Power Narrowband includes Oscillator, Mixer, Limiting Amplifier,
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Order this document MC3357/D
Power Narrowband
includes Oscillator, Mixer, Limiting Amplifier, Quadrature Discriminator, Active Filter, Squelch, Scan Control, Mute Switch. MC3357 designed dual conversion communications equipment. Drain Current (3.0 (Typical) Vdc)
MC3357
POWER
SEMICONDUCTOR TECHNICAL DATA
Excellent Sensitivity: Input Limiting Voltage (Typical) Number External Parts Required Recommend MC3372 Replacement/Upgrade
SUFFIX PLASTIC PACKAGE CASE
SUFFIX PLASTIC PACKAGE CASE 751B (SO-16)
Figure Representative Block Diagram
10.245 Oscillator Mixer Crystal Osc. Mixer Output Filter Squelch Trigger With Hysteresis Audio Mute Limiter Input Scan Control Decoupling Limiter Output Quad Input
CONNECTIONS
Input Mute
Audio Scan
10.7 Input
Ground
Control Input
Filter Filter Squelch
Output Input Output
Demodulator
Limiter Active Filter
Noise Detector
Demodulator Quad Coil
Audio
ORDERING INFORMATION
Device MC3357D MC3357P Operating Temperature Range +70°C Package SO-16 Plastic
Motorola, Inc. 1995
MOTOROLA ANALOG DEVICE DATA
MC3357
MAXIMUM RATINGS 25°C, unless otherwise noted)
Rating Power Supply Voltage Operating Supply Voltage Range Detector Input Voltage Input Voltage (VCC Mute Function Junction Temperature Operating Ambient Temperature Range Storage Temperature Range Symbol VCC(max) Tstg Value -0.5 Unit Vp-p VRMS
Volts)
ELECTRICAL CHARACTERISTICS (VCC Vdc, 10.7 MHz, kHz, fmod kHz, 25°C, unless otherwise noted.)
Characteristic Drain Current Squelch Drain Current Squelch Input Limiting Voltage Limiting) Detector Output Voltage Detector Output Impedance Recovered Audio Output Voltage (Vin Filter Gain kHz) (Vin Filter Output Voltage Trigger Hysteresis Mute Function Mute Function High Scan Function (Mute Off) (V12 Vdc) Scan Function High (Mute (V12 Gnd) Mixer Conversion Gain Mixer Input Resistance Mixer Input Capacitance Unit mVrms
10.245 muRata
Figure Test Circuit
Input 10.7
Filter
Output
Filter
Audio 0.01
MOTOROLA ANALOG DEVICE DATA
MC3357
CIRCUIT DESCRIPTION MC3357 power circuit designed primarily voice communication scanning receivers. mixer-oscillator combination converts input frequency (e.g., 10.7 MHz) down kHz, where, after external bandpass filtering, most amplification done. audio recovered using conventional quadrature detector. absence input signal indicated presence noise above desired audio frequencies. This "noise band" monitored active filter detector. squelch trigger circuit indicates presence noise tone) output which used control scanning. same time, internal switch operated which used mute audio. oscillator internally-biased Colpitts type with collector, base, emitter connections Pins respectively. crystal used place usual coil. mixer doubly-balanced reduce spurious responses. input impedance internal biasing resistor capacitance, allowing circuit preceded crystal filter. collector output must connected below which swing After suitable bandpass filtering (ceramic LC), signal goes input five-stage limiter output limiter drives multiplier, both internally directly, externally through quadrature coil, detect output also used supply feedback other side first limiter stage decoupled recovered audio partially filtered, then buffered, giving impedance around signal still requires de-emphasis, volume control further amplification before driving loudspeaker. simple inverting provided with output providing bias (externally) input which referred internally filter made with external impedance elements discriminate between frequencies. With external detector, filtered audio signal checked presence noise above normal audio band, tone signal. This information applied external positive bias sets squelch trigger circuit such that impedance level around audio mute (Pin open circuit. pulled down noise tone detector, will rise approximately below supply where support load current around internally short-circuited ground. There hysteresis prevent jitter. Audio muting accomplished connecting high-impedance ground-reference point audio path between audio amplifier.
MOTOROLA ANALOG DEVICE DATA
Figure Circuit Schematic
MC3357
MOTOROLA ANALOG DEVICE DATA
MC3357
OUTLINE DIMENSIONS
SUFFIX PLASTIC PACKAGE CASE 648-08 ISSUE
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: INCH. DIMENSION CENTER LEADS WHEN FORMED PARALLEL. DIMENSION DOES INCLUDE MOLD FLASH. ROUNDED CORNERS OPTIONAL. INCHES 0.740 0.770 0.250 0.270 0.145 0.175 0.015 0.021 0.040 0.70 0.100 0.050 0.008 0.015 0.110 0.130 0.295 0.305 0.020 0.040 MILLIMETERS 18.80 19.55 6.35 6.85 3.69 4.44 0.39 0.53 1.02 1.77 2.54 1.27 0.21 0.38 2.80 3.30 7.50 7.74 0.51 1.01
SEATING PLANE
0.25 (0.010)
SUFFIX PLASTIC PACKAGE CASE 751B-05 (SO-16) ISSUE
0.25 (0.010)
NOTES: DIMENSIONING TOLERANCING ANSI Y14.5M, 1982. CONTROLLING DIMENSION: MILLIMETER. DIMENSIONS INCLUDE MOLD PROTRUSION. MAXIMUM MOLD PROTRUSION 0.15 (0.006) SIDE. DIMENSION DOES INCLUDE DAMBAR PROTRUSION. ALLOWABLE DAMBAR PROTRUSION SHALL 0.127 (0.005) TOTAL EXCESS DIMENSION MAXIMUM MATERIAL CONDITION.
SEATING PLANE
0.25 (0.010)
MILLIMETERS 9.80 10.00 3.80 4.00 1.35 1.75 0.35 0.49 0.40 1.25 1.27 0.19 0.25 0.10 0.25 5.80 6.20 0.25 0.50
INCHES 0.386 0.393 0.150 0.157 0.054 0.068 0.014 0.019 0.016 0.049 0.050 0.008 0.009 0.004 0.009 0.229 0.244 0.010 0.019
MOTOROLA ANALOG DEVICE DATA
MC3357
Motorola reserves right make changes without further notice products herein. Motorola makes warranty, representation guarantee regarding suitability products particular purpose, does Motorola assume liability arising application product circuit, specifically disclaims liability, including without limitation consequential incidental damages. "Typical" parameters vary different applications. operating parameters, including "Typicals" must validated each customer application customer's technical experts. Motorola does convey license under patent rights rights others. Motorola products designed, intended, authorized components systems intended surgical implant into body, other applications intended support sustain life, other application which failure Motorola product could create situation where personal injury death occur. Should Buyer purchase Motorola products such unintended unauthorized application, Buyer shall indemnify hold Motorola officers, employees, subsidiaries, affiliates, distributors harmless against claims, costs, damages, expenses, reasonable attorney fees arising directly indirectly, claim personal injury death associated with such unintended unauthorized use, even such claim alleges that Motorola negligent regarding design manufacture part. Motorola registered trademarks Motorola, Inc. Motorola, Inc. Equal Opportunity/Affirmative Action Employer.
reach EUROPE: Motorola Literature Distribution; P.O. 20912; Phoenix, Arizona 85036. 1-800-441-2447 MFAX: RMFAX0@email.sps.mot.com TOUCHTONE (602) 244-6609 INTERNET: http://Design-NET.com
JAPAN: Nippon Motorola Ltd.; Tatsumi-SPD-JLDC, Toshikatsu Otsuki, Seibu-Butsuryu-Center, 3-14-2 Tatsumi Koto-Ku, Tokyo 135, Japan. 03-3521-8315 HONG KONG: Motorola Semiconductors H.K. Ltd.; Ping Industrial Park, Ting Road, N.T., Hong Kong. 852-26629298
MC3357/D MOTOROLA ANALOG DEVICE DATA
*MC3357/D*
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