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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
DESCRIPTION
M52745SP semiconductor integrated circuit display monitor. includes blanking, mixing, retrace blanking, wide band amplifer, brightness control, uniformity function. Main/sub contrast adjust function controlled bus.
CONFIGURATION (TOP VIEW)
BRIGHTNESS IN(R) IN(B) IN(G)
12V(R) OUTPUT(R) FEED BACK(R) 12V(B) OUTPUT(B) FEED BACK(B)
FEATURES
INPUT(R) INPUT(B)
Frequency band width: RGB.200MHz -3dB) OSD.80MHz Input :RGB.0.7V (typ.) OSD.3VP-P minimum (positive) (for OSD).3VP-P minimum (positive) Retrace BLK.3VP-P minimum (positive) Output :RGB.5.5V (max.) OSD.5V (max.) Main contrast contrast controlled bus. Include internal external pedestal clamp circuit
M52745SP
12V(G) OUTPUT(G) FEED BACK(G) RETRACE
INPUT(G) INPUT(SOG)
STRUCTURE
Bipolar silicon monolithic
CLAMP PULSE
APPLICATION
display monitor
RECOMMENDED OPERATING CONDITION
Supply voltage range.11.5 12.5V (V7, V12, V25, V29,V32) 5.5V (V17) Rated supply voltage.12.0V (V7, V12, V25, V29,V32) 5.0V (V17)
Outline 32P4B
MAJOR SPECIFICATION
controlled video pre-amp with mixing function retrace blanking function
12V(R) BRIGHTNESS RETRACE
BLOCK DIAGRAM
INPUT
OUTPUT
CLAMP
CONTRAST MAIN CONTRAST
RETRACE BLANKING
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CLAMP
FEED BACK
12V(B) OUTPUT
INPUT
CLAMP
CONTRAST MAIN CONTRAST RETRACE BLANKING
CLAMP
FEED BACK
12V(G) CONTRAST MAIN CONTRAST RETRACE BLANKING OUTPUT
INPUT
CLAMP
Main CONTRAST 8bit
LEVEL 4bit
CLAMP
FEED BACK
INPUT (SOG)
Sync GreenSep
CONT 8bit CONT 8bit CONT 8bit
M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
CLAMP PULSE
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
Symbol Topr Tstg Vopr Vopr' Parameter Supply voltage Power dissipation Ambient temperature Storage temperature Recommended supply Voltage range Ratings 13.0 2358 +150 12.0 10.5 12.5 Unit
ELECTRICAL CHARACTERISTICS (VCC=12V, Ta=25°C, unless otherwise noted)
Test point 6,9,11
Input
2,3,4
voltage
Bri-
Main cont cont cont cont
Limits Unit Min. Typ. Max. VP-P VP-P
Symbol
Parameter
ICC1 ICC2 Vomax Vimax VSC1 VSC1 VSC2 VSC2 VSC3 VSC3
Circuit current1 Circuit current2
Output dynamic range
Maximum input Maximum gain Relative maximum gain
Main contrast control characteristics1 Main contrast control relative characteristics1 Main contrast control characteristics2 Main contrast control relative characteristics2 Main contrast control characteristics3 Main contrast control relative characteristics3 contrast control characteristics1 contrast control relative characteristics1
contrast
Vari able
Variable
17.1 17.7 19.4
15.0 16.5 18.0
10.5 12.0
VP-P
15.5 16.5 18.0
control characteristics2 contrast control relative characteristics2 contrast control characteristics3 contrast control relative characteristics3
11.0 12.5
VP-P
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M52742SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
ELECTRICAL CHARACTERISTICS (cont.)
Symbol Parameter Test point 6,9,11
Input
2,3,4
voltage
Bri-
Main cont cont cont cont
Limits Unit Min. Typ. Max. -0.3 -0.3 -0.3 -2.0 -1.0 VP-P VP-P VP-P
VMSC
VMSC
Main/sub contrast control characteristics
Main/sub contrast control relative characteristics
ABL1 ABL1 ABL2 ABL2 FC1' FC1' C.T.1 C.T.1' C.T.2 C.T.2' C.T.3 C.T.3'
control characteristics1
control relative characteristics1
control characteristics2
control relative characteristics2
Brightness control characteristics1 Brightness control relative characteristics1 Brightness control characteristics2 Brightness control relative characteristics2 Brightness control characteristics3 Brightness control relative characteristics3 Frequency characteristics1 (f=50MHz)
Frequency relative characteristics1 (f=50MHz)
Vari able
Frequency characteristics1 (f=200MHz)
Frequency relative characteristics1 (f=200MHz)
Vari able
-3.0 -1.0
Frequency characteristics2 (f=200MHz)
Frequency relative characteristics2 (f=200MHz)
Vari able
-3.0 -1.0
Crosstalk (f=50MHz) Crosstalk (f=200MHz) Crosstalk (f=50MHz) Crosstalk (f=200MHz) Crosstalk (f=50MHz) Crosstalk (f=200MHz)
2bSG3 OUT(29) OUT(32) 2bSG3 OUT(29) OUT(32) OUT(29) 6bSG3 OUT(35) OUT(29) 6bSG3 OUT(35) OUT(32) OUT(35) 11bSG3 OUT(32) OUT(35) 11bSG3
Vari able Vari able Vari able Vari able Vari able Vari able
IMINAR PREL
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
ELECTRICAL CHARACTERISTICS (cont.)
Test point 6,9,11
Input
2,3,4
voltage
Bri-
Main cont cont cont cont
Limits Unit Min. Typ. Max. -0.8 -0.8
Symbol
Parameter
VthCP PDCH PDCL Oaj1 Oaj1 Oaj2 Oaj2 OBLK
OBLK
Pulse characteristics1 (4VP-P) Relative pulse characteristics1 Pulse characteristics2 (4VP-P) Relative pulse characteristics2
Variable
Vari able
Vari able
Vari able
Vari able Vari Vari able able
Clamp pulse threshold voltage Clamp pulse minimum width
Pedestal voltage temperature characteristics1 Pedestal voltage temperature characteristics2
Variable
-0.15 -0.15
0.15 0.15
VP-P VP-P VP-P VP-P VP-P
pulse characteristics1 pulse characteristics2
adjust control characteristics1 adjust control relative characteristics1 adjust control characteristics2 adjust control relative characteristics2 adjust control characteristics3 adjust control relative characteristics3
-0.1 -0.3
-0.15
0.15 0.03
input VthOSD1 threshold voltage1 input VthOSD2 threshold voltage2
Variable Variable
VthBLK threshold
voltage
input
Variable
Ohaj1 Ohaj2
half adjust control characteristics1 half adjust control characteristics2
SonG Sync
Retrace
VthRET input threshold
voltage
Variable
SS-NV
SS-SV
input maximum noise voltage minimum input voltage Sync output level
Variable
SonG Sync
Variable
VP-P
Sync
IMINAR PREL
Symbol
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
ELECTRICAL CHARACTERISTICS (cont.) TDS-F TDS-R lccps Parameter Test point 6,9,11
Sync
Input
2,3,4
voltage
Bri-
Main cont cont cont cont
Limits Unit Min. Typ. Max.
Sync output level Sync output delay time1 Sync output delay time2 Power save circult current Spot killer voltage
Sync
Sync
system voltage
10.0 10.4
ELECTRICAL CHARACTERISTICS TEST METHOD
ICC1 Circuit current1 Measuring conditions listed supplementary Table. Measured with current meter test point ICC2 Circuit current2 Measuring conditions listed supplementary Table. Measured with current meter test point Vomax Output dynamic range Decrease gradually, measure voltage when waveform output distorted. voltage called VOL. Next, increase gradually, measure voltage when waveform output distorted. voltage called VOH. Voltage Vomax calculated equation below: Vomax VOH-VOL
Maximum gain Input SG1, read amplitude output (24, 31). amplitude called VOUT (24, 31). Maximum gain calculated equation below: GV=20Log Relative maximum gain Relative maximum gain calculated equation bellow: VOUT (24)/VOUT (28), VOUT (28)/VOUT (31), VOUT (31)/VOUT (24) Main contrast control characteristics1 Measuring amplitude output (24, 31). measured value called VOUT (24, 31). Main contrast control characterics calculated equation bellow: VOUT (dB) VC1=20Log Main contrast control relative characteristics1 VOUT (dB)
Waveform output
Relative characteristics calculated equation bellow: VC1=VOUT (24)/VOUT (28), VOUT (28)/VOUT (31), VOUT (31)/VOUT (24) Main contrast control characteristics2 Measuring condition procedure same described VC1. Main contrast control relative characteristics2 Measuring condition procedure same described VC1.
Vimax Maximum input Increase input signal (SG2) amplitude gradually, starting from 700mVP-P. Measure amplitude input signal when output signal starts becoming distorted.
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LIMINA
M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
Main contrast control characteristics3 Measuring amplitude output (24, 31). measured value called VOUT (24, 31). Main contrast control relative characteristics3 Measuring condition procedure same described VC1.
ABL1 control characteristics1 Measure amplitude output (24,28,31). measured value called VOUT (24,28,31), treated ABL1. ABL1 control relative characteristics1 Relative characteristics ABL1 calculated equation below: ABL1= VOUT (24)/VOUT (28), VOUT (28)/VOUT (31), VOUT (31)/VOUT (24)
VSC1 contrast control characteristics1 Measure amplitude output (24,28,31). measured value called VOUT (24, 31). contrast control characteristics VSC1 calculated equation below: VSC1=20Log VOUT (dB)
ABL2 control characteristics2 Measuring condition procedure same described ABL1. ABL2 control relative characteristics2 Measuring condition procedure same described ABL1.
VSC1 contrast control relative characteristics1 Relative characteristics VSC1 calculated equation below: VSC1=VOUT (24)/VOUT (28), VOUT (28)/VOUT (31), VOUT (31)/VOUT (24). VSC2 contrast control characteristics2 Measuring condition procedure same described VSC1. VSC2 contrast control relative characteristics2 Measuring condition procedure same described VSC1. VSC3 contrast control characteristics3 Measuring amplitude output (24,28,31). measured value called VOUT (24, 31). VSC3 contrast control relative characteristics3 Measuring condition procedure same described VSC1. VMSC Main/sub contrast control characteristics Measure amplitude output (24, 31). measured value called VOUT (24, 31). Main/Sub contrast control characteristics VMSC calculated equation below: VMSC =20Log VOUT (dB)
Brightness control characteristics1 Measure voltage (24, with voltmeter. measured value called VOUT (24, 31), treated Brightness control relative characteristics1 Relative characteristics calculated difference output between channels. VB1= VOUT (24)-VOUT (28), VOUT (28)-VOUT (31), VOUT (31)-VOUT (24)
Brightness control characteristics2 Measuring condition procedure same described VB1. Brightness control relative characteristics2 Measuring condition procedure same described VB1.
Brightness control characteristics3 Measuring condition procedure same described VB1. Brightness control relative characteristics3
VMSC Main/sub contrast control relative characteristics Relative characteristics VMSC calculated equation below:
Measuring condition procedure same described VB1.
VMSC VOUT (24)/VOUT (28),
VOUT (28)/VOUT (31), VOUT (31)/VOUT (24)
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
Frequency characteristics1 (f=50MHz) First, 1MHz input signal. Input resister that about offer voltage input pins order that bottom input signal 2.5V. Control main contrast order that amplitude sine wave output 4.0V P-P. Control brightness order that bottom sine wave output 2.0V P-P. same way, measure output amplitude when 50MHz input signal. measured value called VOUT (24, 31). Frequency characteristics (24, calculated equation below: VOUT VP-P FC1=20log (dB) Output amplitude when inputted (1MHz):4V
C.T.2 Crosstalk2 (f=50MHz) Input (50MHz) pin6 only, then measure waveform amplitude output (24, 31). measured value called VOUT (24, 31). Crosstalk C.T.2 calculated equation below: C.T.2=20 VOUT (24, VOUT (28) (dB)
C.T.2' Crosstalk2 (f=150MHz) Measuring condition procedure same described C.T.2, expect 150MHz. C.T.3 Crosstalk3 (f=50MHz) Input (50MHz) pin11 only, then measure waveform amplitude output (24, 31). measured value called VOUT (24, 31). Crosstalk C.T.3 calculated equation below: C.T.3=20 VOUT (28, VOUT (24) (dB)
Frequency relative characteristics1 (f=50MHz) Relative characteristics calculated difference output between channels. FC1' Frequency characteristics1 (f=150MHz) Measuring condition procedure same described table, expect 150MHz. FC1' Frequency relative characteristics1 (f=150MHz) Relative characteristics FC1' calculated difference output between channels. Frequency characteristics2 (f=150MHz) 1MHz input signal. Control main contrast order that amplitude sine wave output 1.0VP-P. same way, measure output amplitude when 150MHz input signal. measured value called VOUT (24, 31). Frequency characteristics (24, calculated equation below: FC2=20log VOUT VP-P (dB) Output amplitude when inputted (1MHz):4V
C.T.3' Crosstalk3 (f=150MHz) Measuring condition procedure same described C.T.3, expect 150MHz. Pulse characteristics1 (4VP-P) Control main contrast (00H) order that amplitude output signal 4.0VP-P. Control brightness (V1) order that Black level output signal 2.0V. Measure time needed input pulse rise from (Tr1) output pulse rise from (Tr2) with active probe. Pulse characteristics calculated equations below [(Tr2)2-(Tr1)2]
Frequency relative characteristics2 (f=150MHz) Relative characteristics calculated difference output between channels. C.T.1 Crosstalk1 (f=50MHz) Input (50MHz) pin2 only, then measure waveform amplitude output (24, 31). measured value called VOUT (24, 31). Crosstalk C.T.1 calculated equation below: C.T.1=20 VOUT (24, VOUT (28) (dB) Relative pulse characteristics1 Relative characteristics calculated difference output between channels.
Pulse characteristics2 (4VP-P) Measure time needed input pulse fall from (Tf1) output pulse fall from (Tf2) with active prove. Pulse characteristics calculated equations below [(Tf2)2-(Tf1)2]
C.T.1' Crosstalk1 (f=150MHz) Measuring condition procedure same described C.T.1, expect 150MHz.
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
Relative pulse characteristics2 Relative characteristics calculated difference output between channels.
100%
Oaj1 adjust control relative characteristics1 Relative characteristics Oaj1 calculated equation below: Oaj1=VOUT (24)/VOUT (28), VOUT (28)/VOUT (31), VOUT (31)/VOUT (24) Oaj2 adjust control characteristics2 Measuring condition procedure same described
Oaj1. Oaj2 adjust control relative characteristics2 Measuring condition procedure same described Oaj1.
VthCP Clamp pulse threshold voltage Turn down input level gradually from 5.0VP-P, monitoring waveform output. Measure level input when output pedestal level start going down unstable. Clamp pulse minimum width Decrease pulse width gradually from monitoring output. Measure input pulse width point 1.5V) when output pedestal voltage turm decrease with unstable. Pedestal voltage temperature characteristic1 Measure pedestal voltage 25°C. measured value called PDC1. Measure pedestal voltage temperature -20°C. measured value called PDC2. Pedestal voltage temperature characteristics calculated equation below: =PDC1-PDC2 Pedestal voltage temperature characteristic2 Measure pedestal voltage 25°C. measured value called PDC1. Measure pedestal voltage temperature 75°C. measured value called PDC3. Pedestal voltage temperature characteristics calculated equation below: =PDC1-PDC3
OBLK adjust control characteristics3 Measuring condition procedure same described Oaj1. OBLK adjust control relative characteristics3 Measuring condition procedure same described Oaj1. VthOSD input threshold voltage Reduce input level gradually, monitoring output. Measure level when output reaches measured value called VthOSD. VthBLK input threshold voltage Confirm that output signal being blanked time. Monitoring output signal, decreasing level SG6. Measure level when blanking period disappeared. measured value called VthBLK.
VthRET Retrace input threshold voltage Confirm that output signal being blanked time. Monitoring output signal, decreasing level SG7. Measure level when blanking period disappeared. measured value called VthRET.
pulse characteristics1 Measure time needed output pulse rise from (OTR) with active prove.
pulse characteristics2 Measure time needed output pulse fall from (OTF) with active prove. Oaj1 adjust control characteristics1 Measure amplitude output (24, 31). measured value called VOUT (24, 31), treated Oaj1.
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
output voltage Measure voltage D/AOUT. measured value treated VOH. output voltage Measure voltage D/AOUT. measured value treated VOL. output current range Electric current flow from output D/AOUT must less than 1.0mA. Electric current flow into output D/AOUT must more than 0.1mA
SS-NV input maximum noise voltage sync's amplitude changed white into black, increase from 0VP-P 0.02VP-P. pulse output permitted. SS-SV minimum input voltage sync's amplitude changed white black, decrease from 0.3VP-P 0.2VP-P. Confirm malfunction produced noise. Sync output level Measure high voltage SyncOUT. measured value treated VSH. Sync output level Measure voltage SyncOUT. measured value treated VSL. TDS-F Sync output delay time1 SyncOUT becomes High with sync part SG4. Measure time needed front edge sync fall from SyncOUT rise from with active prove. measured value treated TDS-F, less than 90nsec. TDS-R Sync output delay time2 Measure time needed rear edge sync rise from SyncOUT fall from with active prove. measured value treated TDS-R, less than 90nsec.
nonlinearity difference differential non-linearity D/AOUT must less than ±1.0LSB.
UNI1 Uniformity characteristics1 UNI1 Uniformity characteristics2 VuniA amplitude output (24, 31), when voltage. VuniB amplitude output (24, 31), when high voltage. moduration ratio (UNI2) calculated equation below; UNI1 (UNI2)=100 (VuniB/VuniA-1)
Pedestal voltage sync (50%) (50%) VuniB VuniA Pedestal voltage SyncOUT TDS-F TDS-R 5VP-P (2.5VP-P)
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
I2C-BUS PROTOCOL
Slave address
=88H
Slave receiver format
SLAVE ADDRESS acknowledge ADDRESS DATA BYTE STOP condition
START condition
address byte data byte format Function Main contrast contrast contrast contrast level Pedestal clamp INT/EXT
Notes) pedestal level INT/EXT
add.
Data byte (top:byte format under:start condition)
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
TIMING REQUIREMENT
Symbol fSCL tBUF tHD:STA tLOW tHIGH tSU:STA tHD:DAT tSU:DAT tSU:STO Parameter Input voltage Input voltage HIGH clock frequency Time must free before transmission start Hold time start condition. After this period first clock pulse generated period clock HIGH period clock time start condition (Only relevant repeated start condition) Hold time devices Set-up time DATA Rise time both Fall time both Set-up time stop condition Min. -0.5 Max. 1000 Unit
TIMING DIAGRAM
tBUF
tHD:STA
tSU:DAT
tHD:DAT
tSU:STA
tSU:STO
tLOW tHIGH
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
INPUT SIGNAL
Signals Pulse with amplitude 0.7VP-P (f=30kHz). Video width 25µs. (75%)
33µs
Video signal
(all white)
0.7VP-P
Video signal (step wave) 0.7VP-P (Amplitude variable.)
Sine wave
(for freq. char.)
Sine wave amplitude 0.7VP-P. f=1MHz, 50MHz, 200MHz (variable)
Video width 25µs. (75%)
Video signal 0.7VP-P
(all white, black)
white black variable.
0.3VP-P Sync's amplitude variable.
Pulse width amplitude variable.
0.5µs
Clamp pulse
5VTTL
pulse
5VTTL 3VTTL
Amplitude variable.
pulse
5VTTL
Amplitude variable.
f=30kHz
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR TEST CIRCUIT
(31)
(28)
(24)
SW22
M52745SP
SonG
sync
100K
3.3µ
0.01µ
(11)
3.3µ 0.01µ
SonG
SYNC SW16
3.3µ 0.01µ
SW11 SW13
MEASURE POINT
Capacitor 0.01µF (unless otherwise specified.)
Units Resistance Capacitance
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
TYPICAL CHARACTERISTICS
THERMAL DERATING
2800 2400 2358 2000 1600 1200 contrast:
MAIN CONTRAST CONTROL CHARACTERISTICS
1226
AMBIENT TEMPERATURE
MAIN CONTRAST CONTROL DATA
CONTRAST CONTROL CHARACTERISTICS
BRIGHTNESS CONTROL CHARACTERISTICS
Main contrast:
CONTRAST CONTROL DATA
BRIGHTNESS CONTROL VOLTAGE
CHARACTERISTICS
ADJUST CONTROL CHARACTERISTICS
Main contrast: contrast
CONTROL VOLTAGE (VDC)
ADJUST CONTROL DATA
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LIMINA
M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
SYNC GREEN INPUT MIN. PULSE WIDTH
(Video duty=75%) Sync separate normal operating range 100k
INPUT SYNC AMPLITUDE (VP-P)
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
APPLICATION EXAMPLE
110V
5VTTL (for retrace)
4.7µ 0.01µ 4.7µ 0.01µ
4.7µ 0.01µ
M52745SP
0.01µ
0.01µ
100K
4.7µ
Sync Clamp Pulse
4.7µ
3.3µ 0.01µ 3.3µ 0.01µ 3.3µ 0.01µ
2.5V 2.5V 2.5V
(for OSD)
0.01µ
4.7µ
INPUT INPUT INPUT INPUT BACK INTERNAL FEED BACK Units Resistance Capacitance
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
DESCRIPTION
Name voltage Peripheral circuit pins Description function
pulses
to1.7V 2.7V
0.4mA
used.
INPUT INPUT INPUT
about 2.5V clamp pulses from impedance.
2.5V 0.3mA
equivalent voltage channels.
pulses
1.5V
3.5V
2.0V
used.
INPUT
When open 2.5V
3.2V
GREEN input sync separation. Sync negative. input signal Pin7, compare with reference voltage internal circuit order separate sync signal. used, OPEN.
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
DESCRIPTION (cont.)
Name voltage Peripheral circuit pins Description function
2.5V
When open 2.5V
1.2k 1.2k
(Automatic Beam Limiter) input pin. Recommended voltage range When function used,
0.5mA
(5V)
signal output pin, Being open collector output type.
pulses
Clamp Pulse
2.2V 0.5V
impedance.
0.15mA
(Serial clock line) VTH=2.3V
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
DESCRIPTION (cont.)
Name voltage Peripheral circuit pins
Description function
(Serial data line) VTH=2.3V
pulses
0.5V
Retrace
2.25V
used.
Feed Back Feed Back Feed Back
Variable
OUTPUT OUTPUT OUTPUT
Variable
resistor needed side. discretionally maximum 15mA, depending required driving capacity. supply power output emitter follower only.
VCC2
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M52745SP
CONTROLLED 3-CHANNEL VIDEO PREAMP DISPLAY MONITOR
DESCRIPTION (cont.)
Name voltage Peripheral circuit pins Description function
Brightness
recommended that used between pedestal voltage
APPLICATION METHOD M52745SP
CLAMP PULSE INPUT Clamp pulse width recommended above 15kHz, 1.0µsec above 30kHz, 0.5µsec above 64kHz, 0.3µsec. clamp pulse circuit ordinary long round about way, beside high voltage, sometimes connected external terminal, very easy affected large surge. Therefore, Fig. shown right recommended.
NOTICE APPLICATION nearest distance between output pull down resistor. pedestal voltage output signal
EXT-FEED BACK case application circuit example lower figure, which seems that black level signal feedbacked from Power when bottom output signal
Power Power INPUT
MAIN BRIGHTNESS DC:1
Black level
M52745SP
Feed back Black level
EXT-FEED BACK APPLICATION CIRCUIT
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