MC44BS374T1 MC44BS374T1A Freescale Semiconductor, Inc. SO16N
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MC44BS374T1/374T1A Rev. 11/2003 Tuned Audio/Video High Integration Modulator
MC44BS374T1 MC44BS374T1A
Freescale Semiconductor, Inc.
SO16NB Package
Ordering Information
Device MC44BS374T1D,R2 MC44BS374T1AD,R2 Temp Range +70°C +70°C Package SO16NB SO16NB
NOTE: tape reel, suffix.
Contents
1Features Comparing MC44BS374T1/374T1A MC44BC374T1 Descriptions Functional Overview Maximum Ratings Thermal Ratings Electrostatic Discharge Electrical Characteristics Mapping Programming Modulator High Frequency Characteristics Video Characteristics Audio Characteristics Characterization Measurement Conditions Modes Operation High Speed Compatible Circuit Schematics Application Diagrams Evaluation Board Schematic Layout Packaging Instructions Marking Instructions31
MC44BS374T1 MC44BS374T1A audio video modulator VCRs, set-top boxes, similar devices. These products next generation MC44BC374T1 with following features: output level 82dBuV typical MC44BS374T1A, dBuV MC44BS374T1 3.3V compatible Logic Output Port (pin available
Figure shows connections.
GNDD VCCD PLLFLT TVOVCC TVOUT VCCA VIDEO
XTAL
PREEM AUDIO SPLFLT
SO16 package
Figure MC44BS374T1 MC44BS374T1A Connections
This document contains information product under development. Motorola reserves right change discontinue this product without notice. Motorola, Inc., 2003. rights reserved.
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Features
Features
MC44BS374T1/374T1A PAL/NTSC Modulator with integrated VCO. channel on-chip high-speed compatible receiver. Phase-Locked Loop tunes modulator over full range. modulator incorporates sound subcarrier oscillator uses second derive 4.5, 5.5, 6.0, subcarrier frequencies. These frequencies selectable bus. picture-to-sound ratio adjusted using bus. addition, on-chip video test pattern generator switched with audio test signal. MC44BS374T1/374T1A have following features: Integrated on-chip programmable oscillator external varicaps diodes inductor tuned components Extremely external components count Channel 21-69 operation range possible internal dividers (30MHz-450MHz) Boosted output level dBuV typical) MC44BS374T1A output level dBuV typical MC44BS374T1 High speed read write I2C-bus compatible (800kHz) I2C-bus 3.3V compatible Fixed video modulation depth (82% typical) Peak White Clip disabled Programmable picture/sound carrier ratio Integrated on-chip programmable sound subcarrier oscillator (4.5, 5.5, MHz) external varicaps On-chip video test pattern generator with sound test signal (1kHz) Low-power programmable modulator standby mode Transient output inhibit during Lock-up power-ON Logical Output Port controlled Start-up channel `71' (871.25 MHz) protection, minimum
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Comparing MC44BS374T1 MC44BS374T1A MC44BC374T1
Compared MC44BC374T1 devices, MC44BS374T1/374T1A following improvements: Higher output level MC44BS374T1A dBuV versus 74.5 dBuV) Higher Video signal noise MC44BS374T1A I2C-bus 3.3V compatible Lower power consumption normal standby modes
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device powered down without holding lines down
Descriptions
Switch between integrated VCO's controlled directly frequency divider MHz) external standby more required lines hold down when device powered standby replaced Logic Ouput Port (pin Lower second harmonic spurious higher third harmonic spurious. application easier filter third harmonics spurious than second harmonics these frequencies always band. Unfortunately second harmonic fall back into same band (for instance channel second harmonic). this reason almost impossible have good rejection second harmonic with external pass filter. This reason design been optimized maximum second harmonic rejection spite increase third harmonic.
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Descriptions
Table SO16 Package Descriptions
number Name XTAL PREEMP AUDIO SPLFLT VIDEO VCCA TVOUT TVOVCC PLLFLT VCCD GNDD clock data Logical output port controlled Crystal Ground Pre-emphasis capacitor Audio input Sound loop filter Video input Main analog supply voltage Analog ground output signal output stage supply voltage loop filter Digital supply voltage Digital ground Description
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Functional Overview
Functional Overview
Figure shows simplified block diagram MC44BS374T1/374T1A device. MC44BS374T1/374T1A device three main sections: high speed I2C-compatible section section synthesize output channel frequency (from integrated oscillator, divided output) modulator section, which accepts audio video inputs, then uses them modulate UHF/VHF carrier on-chip video test pattern generator with audio test signal included. MC44BS374T1/374T1A operates multi-standard modulator handle following systems using same external circuit components:
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High frequency BiCMOS technology allows integration tank circuit certain filtering functions.
Peak White Clip VIDEO SPLLFLT MODULATOR SECTION
Video Modulator
Clamp
31.25
Sound Sound Oscillator Modulator Audio Amplifier
AUDIO PREEM
TVOVCC TVOUT
Prog Divider
VCCA
Sound Modulator SECTION
Dividers
SECTION
High Speed Receiver
Prescaler/8 Prog Divider
Phase Comp
Divider /128
4MHz
31.25KHz PLLFLT XTAL
VCCD
GNDD
Figure MC44BS374T1/374T1A Simplified Block Diagram
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Maximum Ratings
Maximum Ratings
Tamin Tamax Supply voltage Minimum operating ambient temperature Maximum operating ambient temperature Parameter Value Unit
This device contains protection circuitry guard against damage high static voltage electric fields. However, precautions must taken avoid applications voltage higher than maximum rated
voltages this high impedance circuit. proper operation, input output voltages should constrained ranges indicated Recommended Operating Conditions.
Tstgmin Minimum storage temperature Tstgmax Maximum storage temperature Junction Temperature
Note: Maximum ratings those values beyond which damage device occur. functional operation, values should restricted Recommended Operating Condition.
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Note:
Meets Moisture Sensitivity Level pack required.
Thermal Ratings
Rthja Parameter Thermal resistance from Junction Ambient Value Unit °C/W
Electrostatic Discharge
Electrostatic Discharge tests done
Parameter (Machine Model) 883C method 3015-7 (Human Body Model) 883C method 3015-7
4000
Unit
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Electrical Characteristics
Electrical Characteristics
100% tested 100% Correlation tested Characterized samples Design parameter
Characterization conditions section each type parameter.
Operating Conditions
Unless otherwise stated: Vcc=5.0 Ambient Temperture=25o Video Input 1Vp-p, 10-step grayscale. output into load.
NOTE:
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Specifications only valid envelope demodulation.
Table Operating Conditions
Parameter Operating supply voltage range Total supply current Total standby mode supply current Test pattern sync pulse width Sound comparator charge pump current During locking When locked comparator charge pump current Crystal oscillator stability-negative resistance Logic Output Port Saturation voltage Leakage current Unit sections active OSC=0, SO=1, Section active Notes Type
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Mapping
Mapping
WRITE MODE CA-CHIP ADDRESS C1-High Order Bits C0-Low Order Bits FM-High Order Bits FL-Low Order Bits READ MODE CHIP ADDRESS R-Status Byte Name TPEN SFD1 Description Peak White Clip enable disable oscillator Modulator output attenuated-sound video modulators Sound subcarrier frequency control bits Sound Oscillator Logic Output Port Picture-to-sound carrier ratio Test pattern enable-picture sound Test mode bits-All bits normal operation (see Test Mode tables, page page except "OSC" (normal mode "1") frequency programming bits, steps oscillator out-of-frequency range information oscillator operating range information SFD0
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SFD0, TPEN X5.X0 N0.N11
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Programming
Programming
Sound
Sound Subcarrier Freq (MHz) Picture-to-Sound Ratio (dB) Sound Oscillator Sound oscillator (Normal mode) Sound oscillation disabled (oscillator section bias turned OFF) Modulator Output Attenuation Normal operation Modulator output attenuation (sound video modulators sections bias turned OFF.
Oscillator Normal operation oscillator disabled (oscillator sections bias turned OFF)
Standby Mode
Combination 3-bits Modulator standby mode
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Video
TPEN Peak White Clip Peak White Clip (System Peak White Clip (System Test Pattern Signal Test pattern signal (normal operation) Test pattern signal (picture sound)
Logic Output Port
Description voltage high impedance
WRITE MODE: Test Mode Range
State Normal operation frequency divided frequency testing range: drive applied modulators: Non-inverted video TVOUT drive applied modulators: Inverted video TVOUT Transient output inhibit disabled speed mode) During this speed-up test mode, ATT=0 forces sound current source 1µA, ATT=1 forces 10µA. Description
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WRITE MODE: Test Mode
State Normal operation Description
Programming
Test pattern generator verification (Test pattern test mode available) Program divider test (UHF program divider PLLFILT sound program divider SPLLFIL pin) Reference divider test (UHF reference divider PLLFILT pin) phase comparison, upper source PLLFILT Sound phase comparison upper source SPLLFIL Only valid during transient output inhibit. phase comparison, lower source PLLFILT Sound phase comparison lower source SPLLFIL Only valid during transient output inhibit. Sound phase comparison upper source SPLLFIL valid during transient output inhibit. Sound phase comparison lower source SPLLFIL valid during transient output inhibit.
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NOTE:
Test modes intended manufacturing test purposes only cannot used normal applications, except range (states 1.e).
READ MODE
High active active Normal operation, range range Description range, frequency low, only valid OOR=1 range, frequency high, only valid OOR=1 Description Description
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Freescale Semiconductor, MC44BS374T1A High Frequency Characteristics
Inc.
MC44BS374T1A High Frequency Characteristics
Unless otherwise stated: Vcc=5.0 Ambient Temperture=25o Video Input 1Vp-p, 10-step grayscale. inputs outputs into load.
NOTE:
Specifications only valid envelope demodulation.
Table High Frequency Characteristics
Parameter TVOUT output level oscillator frequency Test Conditions Output signal from modulator section Figure Note From oscillator internally divided During transient output inhibit, when Figure Note Reference picture carrier. Note Unit dBµV Type
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range
TVOUT output attenuation
Sound subcarrier harmonics Second harmonic chroma subcarrier Chroma Sound intermodulation: Fsnd Fchr
Using bar. Note
Using bar.See Note harmonic: CH21 harmonic: CH21 Other channels: Figure NOTE Note From GHz. Note video sound modulation.See Note
(picture carrier) harmonics
dBµV
band (picture carrier) spurious band spurious MHz) Note: Note:
dBµV
Picture carrier harmonics highly dependant layout decoupling capacitors. "Characterization Measurement Conditions" page
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Freescale Semiconductor, Inc. MC44BS374T1 High Frequency Characteristics
Harm onics
Harm onics
Maximum specification
dBuV
Maximum specification
dBuV
Typical
Typical
Frequency (Mhz)
Frequency (Mhz)
Output Level
Output Attenuation
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Maximum specification
Typical
dBuV
Typical Minimum specification
Minimum specification
Frequency (Mhz)
Frequency (Mhz)
Figure Typical High Frequency Performance
MC44BS374T1 High Frequency Characteristics
Unless otherwise stated: Vcc=5.0 Ambient Temperture=25o Video Input 1Vp-p, 10-step grayscale. inputs outputs into load.
NOTE:
Specifications only valid envelope demodulation.
Table High Frequency Characteristics
Parameter TVOUT output level MC44BS374T1A oscillator frequency range From oscillator internally divided During transient output inhibit, when Figure Note Test Conditions Output signal from modulator section Figure Note Unit dBµV Type
TVOUT output attenuation
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Freescale Semiconductor, MC44BS374T1 High Frequency Characteristics
Inc.
Table High Frequency Characteristics
Parameter Sound subcarrier harmonics Second harmonic chroma subcarrier Chroma Sound intermodulation: Fsnd Fchr Test Conditions Reference picture carrier. Note Unit Type
Using bar. Note
Using bar.See Note harmonic: CH21 harmonic: CH21 Other channels: Figure NOTE Note From GHz. Note video sound modulation.See Note
(picture carrier) harmonics
dBµV
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band (picture carrier) spurious band spurious MHz) Note: Note:
dBµV
Picture carrier harmonics highly dependant layout decoupling capacitors. "Characterization Measurement Conditions" page
Harm onics
Harm onics
Maximum specification
dBuV
Maximum specification
dBuV
Typical
Typical
Frequency (Mhz)
Frequency (Mhz)
Output Level
Output Attenuation
Maximum specification
Typical
dBuV
Typical Minimum specification
Minimum specification
Frequency (Mhz)
Frequency (Mhz)
Figure Typical High Frequency Performance
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Video Characteristics
Video Characteristics
Unless otherwise stated: Vcc=5.0 Ambient Temperature=25o Video Input 1Vp-p, 10-step grayscale. output into load.
Note: Specifications only valid envelope demodulation. Table Video Performance Characteristics
Parameter Video bandwidth Video input level Video input current Test Conditions Reference kHz, measured MHz. Note load -1.5 Video Modulation depth video=1.4VCVBS sound modulation,100% white video Video MC44BS374T1A Using CCIR Rec.567 weighting filter Figure Note Unweighted. Note sound modulation,100% white video Video MC44BS374T1 Using CCIR Rec.567 weighting filter Figure Note Unweighted. Note Differential Phase Differential Gain Luma Sync ratio Video modulation depth Note: CCIR Test Line 330, Note CCIR Test Line 330, Note Input ratio Figure Note 90.5 -0.8 97.5 Unit Vcvbs Type
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Video input impedance Peak White Clip
"Characterization Measurement Conditions" page
Video Signal Noise CCIR Weighting filter)
Typical
Minimum specification
Frequency (Mhz)
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Audio Characteristics
Video Modulation Depth
Maximum specification
Typical
Minimum specification
Frequency (Mhz)
Figure Typical Video Performance
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Audio Characteristics
Unless otherwise stated: Vcc=5.0 Ambient Temperture=25o Video Input 1Vp-p, 10-step grayscale. inputs outputs into load.
Note: Specifications only valid envelope demodulation. Table Audio Performance Characteristics
Parameter Picture-to-Sound ratio Test Conditions Unit Type
Using specific pre-emphasis circuit, audio input level mVrms audio frequency modulation 5.5, 100% modulation +/-50 deviation modulation NTSC 100% modulation +/-25 deviation Audio input resistance Reference kHz, using specified pre-emphasis circuit, measure from Depends loop filter components kHz, 100% modulation video 1Khz, modulation (+/-25Khz) color bars Video signal, using CCIR 468.2 weighting filter
Audio modulation depth
Audio Frequency response
-2.0
+2.0
Audio Distortion (THD only) Audio with Sync Buzz Note:
"Characterization Measurement Conditions" page
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Freescale Semiconductor, Inc. Characterization Measurement Conditions
Audio Weighted Signal Noise
Typical
Minimum specification
Frequency (Mhz)
Figure Typical Audio Performance
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Characterization Measurement Conditions
following list shows MC44BS374T1/374T1A default configuration unless otherwise specified. Peak White Clip enabled oscillator Sound video modulators Sound subcarrier frequency Sound Oscillator Logic Output Port Picture-to-sound carrier ratio Test pattern disabled test mode bits Frequency from channel
Inputs Output into 75ohm Load using transformation. Video Input 1Vpp. Audio pre-emphasis circuit enabled.
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Freescale Characterization Measurement Conditions
Semiconductor, Inc.
Table Measurement Conditions
Device Signals Set-up TVOUT output level Measured picture carrier dBuV with HP8596E Spectrum Analyzer using transformation, cables losses transformation pads having been calibrated. Measurement used reference other tests: TVout_Ref Measurement Set-up
Video: steps grey scale audio
TVOUT output attenuation ATT" Video signal Audio signal Measure picture carrier ATT=1 with reference picture carrier ATT=0
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Sound Subcarrier Harmonics Video: steps grey scale Audio signal Measure second third sound harmonics levels reference picture carrier (TVout_Ref).
Picture carrier Sound carrier
Sound harm Sound harm +5.5MHz +11MHz +16.5MHz
Second Harmonics Chroma subcarrier audio Video: 700m sinusoidal signal inserted black level active video area.
Frequency Frequency 100kHz 100Khz
Measure dBc, reference picture carrier (TVout_Ref), second harmonic chroma channel frequency plus times chroma frequency, resulting following spectrum.
Picture carrier 700mVpkpk
700mV pk-pk
Chroma carrier
Sound carrier Chroma Harmonic
+4.43MHz +5.5MHz
+8.86MHz
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Table Measurement Conditions
Device Signals Set-up Measurement Set-up Chroma/Sound Intermodulation audio signal Video: 700m sinusoidal signal inserted black level active video area.This generated using Rohde Schwarz Video Generator inserting required frequency from Signal generator.
Frequency Frequency 100kHz 4.43
Measure dBc, reference picture carrier (TVout_Ref), intermodulation product channel frequency plus sound carrier frequency (+5,5 MHz) minus chroma frequency (-4,43 MHz), resulting following spectrum. Intermodulation product channel frequency +1,07 MHz.
Picture carrier Chroma carrier Chroma/Sound Intermod. Sound carrier
700mVpp
700mV pk-pk
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+1.07MHz
+4.43MHz +5.5MHz
Picture Carrier Harmonics Video signal Audio signal Measure dBc, reference picture carrier (TVout_Ref), second third harmonic channel frequency, resulting following spectrum.
Picture carrier
harmonic
harmonic
Band Spurious Video signal Audio signal Measure dBuV spurious levels 0.25, 0.5, 0.75 times channel frequency, resulting following spectrum Measure from 40MHz 1GHz.
Picture carrier
Spurious
Fo/4
Fo/2 Fo*3/4
Fo*3/2
Band Spurious Video signal Audio signal Measure dBc, reference picture carrier (TVout_Ref), spurious levels falling into video bandwidth starting from +/-100 from picture carrier +/-5MHz.
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Freescale Characterization Measurement Conditions
Semiconductor, Inc.
Table Measurement Conditions
Device Signals Set-up Video Bandwidth Video signal demodulated spectrum analyzer, peak level 100KHz signal measured reference. frequency then swept from 100KHz 5MHz, then difference from 100KHz reference level measured. Measurement Set-up
audio Video: 600mVpp sinusoidal signal inserted black level active video area.
Weighted Video Signal Noise Video: 100% White video signal 1Vpkpk. Audio signal This measured using Rohde Schwarz AMFS Demodulator (using CCIR Rec. weighting network, 100kHz 5MHz band with sound trap envelope detection, Rohde Schwarz Video Analyzer. Video Analyzer measures ratio between amplitude active area video signal (700mV) noise level Vrms video black level which show below.
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VideoS/N calculated log(700
noise level Vrms
Unweighted Video Signal Noise Same above with CCIR filter disabled. Same above.
Video Differential Phase Video: step Grey Scale- 1Vpk-pk. Audio signal This measured using Rohde Schwarz AMFS Demodulator (using CCIR Rec. weighting network, 100kHz 5MHz band with sound trap, envelope detection, Rohde Schwarz Video Analyzer. line CCIR 330, video analyzer measure consists calculating difference Chroma phase black level different chroma subcarrier phase angles each step greyscale. largest positive negative difference indicates distortion.
largest positive negative difference DIFF PHASE phase position 100%
video analyzer method takes worst step from first steps.
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Table Measurement Conditions
Device Signals Set-up Measurement Set-up Video Differential Gain Video: step Grey Scale- 1Vpk-pk. Audio signal This measured using Rohde Schwarz AMFS Demodulator (using CCIR Rec. weighting network, 100kHz 5MHz band with sound trap envelope detection, Rohde Schwarz Video Analyzer. line CCIR shown below, video analyzer measure consists calculating difference Chroma amplitude black level different amplitudes each step greyscale. largest positive negative difference indicates distortion.
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5-step Greyscale with Chroma subcarrier superimposed
(not scale), line CCIR 330.
largest positive negative difference DIFF GAIN amplitude position
100%
video analyzer method takes worst step from first steps. Video Modulation Depth Audio signal Video: step grey scale This measured using HP8596E Spectrum Analyzer with Trigger option, allowing demodulation triggering specified Line. analyzer centred maximum peak Video signal reduced zero Hertz span Linear mode demodulate Video carrier.
6-10mV) A(mV)
B(mV) (0.6 3mV)
Line Demodulated Spectrum Analyzer-BG standard
Modulation Depth calculated (A-B)/A Picture Sound ratio Video signal Audio Signal Measure sound carrier reference picture carrier (TVout_Ref) bit=0 (PS=12dB typical) bit=1 (PS=16dB),
Picture carrier
Sound carrier
+5.5Mhz
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Freescale Characterization Measurement Conditions
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Table Measurement Conditions
Device Signals Set-up Measurement Set-up Audio Modulation Depth Video Black Level Audio signal: 1Khz, 205mVrms. This measured using Rohde Schwarz AMFS Demodulator HP8903A Audio Analyzer 1kHz audio signal 205mV 1kHz supplied Audio Analyzer, demodulated signal deviation indicated Demodulator peak. This value then converted deviation, based specified standards. Audio Frequency response audio signal 1KHz 100mVrms supplied Audio Analyzer, demodulated Demodulator audio analyzer measures amplitude this demodulated audio signal: this value taken reference (0dB). audio signal then swept from 50Hz 15KHz, demodulated amplitude measured relative 1KHz reference. Audio pre-emphasis de-emphasis circuits engaged, audio analyzer filters switched OFF. Audio Distortion Audio: 1Khz, adjustable level Video Black Level This measured using Rohde Schwarz AMFS Demodulator HP8903A Audio Analyzer 1kHz. output level Audio analyzer varied obtain deviation 50kHz indicated Demodulator. input arms detector Audio Analyzer converts level combined signal noise distortion then removes fundamental signal (1kHz) after having measured frequency. output detector converts residual noise distortion voltmeter measures both signals calculates ratio signals. ADist Distorsion Noise Distorsion Noise Signal Audio Signal Noise Audio Analyzer alternately turns it's internal audio source make measure Audio signal plus noise then another measure only noise. measurement made using internal CCIR468-2 Filter Audio Analyzer together with internal 30+/-2kHz (60dB/decade) Lowpass filters. AMFS demodulator uses quasi-parallel demodulation case normal set. this mode Nyquist filter bypassed video carrier used without added delay effectuate intercarrier conversion. this mode phase noise information fully cancels true measured. Signal Noise Noise
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Video Black Level Audio signal: 50Hz 15KHz, 100mVrms This measured using Rohde Schwarz AMFS Demodulator HP8903A.
Audio: 1Khz, adjustable level Video: Color Bars This measured using Rohde Schwarz AMFS Demodulator HP8903A Audio Analyzer 1kHz. output level Audio analyzer varied obtain Modulation Deviation 25kHz indicated AMFS Demodulator.
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Modes Operation
Modes Operation
16.1 Power Settings
power-ON, MC44BS374T1/374T1A configured follows:
Table Power Settings
WRITE MODE C1-High Order Bits C0-Low Order Bits FM-High Order Bits
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FL-Low Order Bits Note: Note: Note: Note: Note:
have oscillator channel 871.25 Peak White Clip Sound frequency MHz. Logic Output Port voltage Picture sound ratio
16.2 Power Supply
three device Vccs (pins must applied same time ensure internal blocks correctly biased. bias other before applied MC44BS374T1/374T1A. When Vccs switched pins high impedance.
16.3 Standby modes
During standby mode, modulator switched power consumption. That sound oscillator, oscillator, video sound modulator section's bias internally turned OFF. section remains active. MC44BS374T1/374T1A standby mode with combination bits: OSC=0, SO=1 ATT=1
16.4 Transient Output Inhibit
minimize risk interference other channels while acquiring lock desired frequency, Sound Video modulators turned during time period each following cases: Power-ON from zero i.e., switched from oscillator power-ON from state i.e., switched from
There time-out 263ms until output enabled. This lets settle programmed frequency. During 263ms time-out, sound current source typical speed locking time. After 263ms time-out, current source switched care when selecting loop filter components, ensure loop transient does exceed this delay.
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Modes Operation
test purposes, possible disable 263ms delay using Test Mode 1-State (this called speed mode).
16.5 Oscillator-VHF range
oscillator fully integrated does require external components. frequency testing range operation test mode states oscillator internally divided
16.6 Section
reference divider fixed divide-by-128, resulting reference frequency 31.25 with crystal.
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prescaler fixed divide-by-8 permanently engaged. programmable divider division-ratio controlled state control bits N11. divider-ratio desired frequency MHz) given
with:
2048 1024
NOTE:
Programming division-ratio allowed.
16.7 Logic Output Port (LOP)
controls logic function. primary applications control external attenuator external switch, between antenna input output. typical attenuator application with diode shown Figure switches attenuator depending signal strength Antenna Input. This reduces risks intermodulation certain areas. also used position bypass switch other logic functions application.
Antenna Input
Figure Typical Attenuator Application with Diode
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16.8 Video Section Peak White Clip
MC44BS374T1/374T1A requires following proper video functionality: composite video input with negative going sync pulses nominal level
Modes Operation
This signal AC-coupled video input where sync level clamped. video signal then passed Peak White Clip (PWC) circuit. circuit function soft-clips video waveform, sync amplitude peak white clip goes high. This avoids carrier over-modulation video. Clipping disabled software.
16.9 Test Pattern Generator
Freescale Semiconductor, Inc.
generates simple test pattern, which switched under control permit receiver easily tune modulator output. pattern consists white vertical bars black background audio test signal.
7/10
3/10
2830
TIME
Figure Test Pattern Generator
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Modes Operation
16.10 Sound Section
oscillator fully integrated does require external components. internal low-pass filter matched structure provide very harmonics levels. sound modulator system consists modulator incorporating sound subcarrier oscillator. audio input signal AC-coupled into amplifier, which then drives modulator. audio preemphasis circuit high-pass filter with external capacitor internal resistor Ohms typical recommended capacitor value standard (with time constant recommended capacitor value standard (with time constant increase audio bandwidth frequencies possible change sound loop filter. recommended values increase bandwidth frequencies (lower than possible larger loop filter capacitor values. This will give lower frequency. this case necessary calculate values loop filter according required factor loop bandwidth. This described following figure:
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Sound loop filter calculation
Loop filter equation
Kosc with
frequency Phase detector current Kosc 5MHz/V sound oscillator slope fact Kosc=40MHz/prescaler divider This gives MHz/V sound divider ratio quality factor added minimize glitches, usually tenth size Example Fref=31.25KHz N=5.5MHz 31.25KHz Assuming then rad, 57Hz depends desired frequency response Choosing starting point, then resistance acts directly factor quality adjusted create peaking frequency range. recommended adjust value experimentally depending application requirements. proposed application schematic value been chosen.
Figure Sound Loop Filter Calculation
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Freescale Semiconductor, Inc. Compatible High Speed
High Speed Compatible
17.1 Specification Conditions
Unless otherwise specified,
Electrical Characteristics output current input level high input level SDA/SCL input current input level from 0.4V 0.3Vcc SDA/SCL input level SDA/SCL capacitance output level sinking current) output level sinking current) Timing Characteristics clock frequency free time between stop start Setup time start condition Hold time start condition Data setup time Data hold time Setup time stop condition Hold time stop condition Acknowledge propagation delay fall time sink 130pF load fall time sink 400pF load rise time fall/rise time Pulse width spikes suppressed input filter Tbuf Tsu;sta Thd;sta Tsu;dat Thd;dat Tsu;sto Thd;sto Tack;low Symbol Symbol Vcc+0,3 Unit Unit Type Type
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17.2 Timing Definitions
Stop Tbuf Start Chip Address
Start
Stop
SSDA SSCL
Tsu;sto Thd;sta
Tsu;dat
Thd;dat
Tack:low
Tsu;sta
Thd;sto
Figure SSDA/SSCL Timing
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Freescale High Speed Compatible
17.3 Level Definitions
Semiconductor, Inc.
SDA/SCL high levels designed compatible with 0-5V 0-3.3V signals.
dead band
Figure SDA/SCL Levels
17.4 High Speed Compatible Format
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Chip Address ($CA)
First Data Byte
Data
Stop
Figure Timing
17.5 Write Mode Format Receiver
receiver operates compatible data format. chip address follows.
Table Chip Address (I2C Bus)
(ACK) write mode
write mode, each ninth data bits acknowledge (ACK) during which sends logic Modulator circuit answers data line pulling low. Besides chip address, circuit needs four data bytes operation. following sequences data bytes permitted incoming information:
Table Permitted Data Bytes (Incoming Information)
Example Example Example Example Note: Start condition Chip Address
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Freescale Semiconductor, Inc. Compatible High Speed
Table Permitted Data Bytes (Incoming Information)
Frequency information, high order bits Control information, high order bits Stop condition Frequency information, order bits Control information, order bits
After chip address, four data bytes received. three data bytes received, third ignored. five more data bytes received, fifth following ones ignored, last pulse sent fourth data byte.
Freescale Semiconductor, Inc.
first third data bytes contain function bit, which lets distinguish between frequency information control information. function logic following bytes contain control information. first data byte after chip address, byte byte bytes frequency information preceded logic
17.6 Read Mode Format
chip address
Table Chip Address (I2C Read Mode)
(ACK) read mode
incoming information consists read mode chip address byte. device then answers with followed byte containing three bits status information. acknowledge answered modulator after this byte.
MOTOROLA
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Circuit Schematics
Circuit Schematics
VCCD VCCD VCCD VCCD
1.5K
XTAL
Freescale Semiconductor, Inc.
PREM
11.8k
AUDIO
audio
SPLLFLT
TVOVCC
PLLFLT
VIDEO
Figure Circuit Schematics
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MOTOROLA
Application Diagram
Application Diagram
This document contains information product under development. Motorola reserves right change discontinue this product without notice.
Note
2.2k
GNDD
22nF
Note 10nF
VCCD
4MHz
Note 470pF
PLLFLT
XTAL
TVOVCC
47nF
TVOUT Note 10nF
TVOUT
Freescale Semiconductor, Inc.
Pre-em
PREEM
AUDIO
VCCA
SPLLFLT
VIDEO
100nF 22nF
220nF
10nF
Video
100nF
Audio
Note: Note: Note:
value depends crystal characteristics. Motorola application board. Loop Filter components must close possible Vccd Supply voltage decoupling capacitors must close possible ground.
MOTOROLA
Figure Proposed Application Schematic
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Freescale Evaluation Board Layout Schematic
Semiconductor, Inc.
Evaluation Board Layout Schematic
20.1 Evaluation Board Layout
Freescale Semiconductor, Inc.
Figure Evaluation Board Layout
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MOTOROLA
Freescale Semiconductor, Inc. Layout Schematic Evaluation Board
20.2 Evaluation Board Schematic
Freescale Semiconductor, Inc.
Figure Evaluation Board Schematic
MOTOROLA
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Packaging Instructions
Packaging Instructions
Tape reel packaging 12MRH00360A issue with following conditions applicable Dual InLine (SOIC) package.
Figure Dual In-line (SOIC)
Freescale Semiconductor, Inc.
Component Orientation: Arrange parts with side closest tape's round sprocket holes tape's trailing edge.
Marking Instructions
marked part across package. width mils, length least four times width. placement extend across chamfer dimple areas. Dimple line: MCBS374T1 (Part number coded digits) line: Assembly site code digits) followed wafer code digit), year digit) work week digits)
MCBS374T1
AWLYWW
marked part across package. width mils, length least four times width. placement extend across chamfer dimple areas. Dimple
MCBS374T1A
AWLYWW
line: MCBS374T1A (Part number coded digits) line: Assembly site code digits) followed wafer code digit), year digit) work week digits)
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MOTOROLA
Case Outline
Freescale Semiconductor, Inc.
Millimeters 1.35 0.35 0.19 0.25 1.75 0.25 0.49 0.25 1.25
Inches 0.054 0.004 0.385 0.229 0.150 0.014 0.008 0.016 0.010 0.068 0.009 0.393 0.244 0.157 0.019 0.009 0.049 0.019
Note: Dimensions Tolerances ASME Y14.5M, 1994. Note: Controlling dimension: Millimeters. Note: Dimension include mold protrusion. Note: side. Maximum mold protrusion 0.15 0.006
Note: Dimension does include Dambar protrusion. Allowable Dambar protrusion shall 0.127 0.005 total excess dimension maximum material condition.
1.27
0.050
Figure SO16NB package
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Freescale Semiconductor, Inc.
REACH USA/EUROPE/LOCATIONS LISTED: Motorola Literature Distribution; P.O. 5405, Denver, Colorado 80217 1-303-675-2140 1-800-441-2447 JAPAN: Motorola Japan Ltd.; SPS, Technical Information Center, 3-20-1, Minami-Azabu Minato-ku, Tokyo 106-8573 Japan 81-3-3440-3569 ASIA/PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Centre, King Street, Industrial Estate, N.T., Hong Kong 852-26668334 TECHNICAL INFORMATION CENTER: 1-800-521-6274 HOME PAGE:
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