Monolithic Linear LA7357 PAL/SECAM Discrimination Circuit VC

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Monolithic Linear LA7357 PAL/SECAM Discrimination Circuit VC

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Ordering number EN5654
Monolithic Linear
LA7357
PAL/SECAM Discrimination Circuit VCRs
Overview
LA7357 used PAL/SECAM discrimination Since ceramic resonator tank circuit required, only small number external components used, LA7357 contribute reduced mounting areas lower system costs.
Package Dimension
unit: 3098B-DIP10S
[LA7357]
Specifications
Maximum Ratings 25°C
Parameter Maximum supply voltage Allowable power dissipation Operating temperature Storage temperature Symbol Topr Tstg Conditions
SANYO: DIP10S
Ratings +125 Unit
Operating Conditions 25°C
Parameter Supply voltage Operating voltage range Symbol Conditions Ratings Unit
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, JAPAN
73097HA(OT) 5654-1/6
LA7357 Operating Characteristics 25°C,
Parameter Symbol ICC1 ICC2 Conditions ground, influx current: output VCC, influx current: output voltage when output appears when slowly raising voltage applied from input signal should mVp-p: output voltage when output appears when slowly lowering voltage applied from input signal should mVp-p: output Stipulated output ratio when mVp-p amplitude sine wave input output Measure output amplitude when mVp-p amplitude sine wave input output level when switches from high when slowly raising from output level when switches from high when slowly lowering from output With load: output With load: output Ratings 10.0 10.5 13.0 13.5 Unit
Current drain
threshold level
SYNC threshold level
Input limiter amplifier gain
LIMG
Input limiter amplifier level
LIMD
mVp-p
Comparator hysteresis high-level voltage
Comp
Comparator hysteresis low-level voltage DET-OUT output high-level voltage DET-OUT output low-level voltage
Comp DETH DETL
Switching Conditions
Input signal Symbol ICC1 ICC2 LIMG LIMD Comp Comp DETH DETL signal signal Sig.1 signal Sig.1 Sig.1 signal signal Sig.2 Sig.3 signal signal signal1 Sig.1 signal signal signal signal Sig.1 Sig.1 signal signal Input pulse signal signal Variable level Variable level Variable level Variable level Applied voltage Switch states
5654-2/6
LA7357 Block Diagram
Test Circuit
5654-3/6
LA7357 Functions
Functions Equivalent circuit
CHROMA-IN
Chrominance signal input. This handle burst unmodulated carrier SECAM input) signal amplitudes between mVp-p.
HPF.MONI
High-pass filter output monitor avoid interference between this should connected during normal operation.
FILTER
Phase comparator output This signal smoothed with external capacitor. smoothed level will lower higher SECAM MESECAM.
SYNC input input level 1.0- 2.0-V rising pulse during SYNC period, 3.0- 4.5-V rising pulse during period. Note that since SYNC+BGP combined C.SYNC pulse output from when LA7357 used combination with Sanyo single-chip (any LA7430, LA7435, LA71520) external component will required
DET-ADJ
Discrimination sensitivity adjustment discrimination shifted towards voltage increased, towards SECAM voltage lowered. This normally left open.
Continued next page.
5654-4/6
LA7357
Continued from preceding page.
Functions Equivalent circuit
FSC-IN
(4.43 MHZ) input This handle inputs with amplitude between about mVp-p.
AFP.MONI
output monitor This must connected prevent interference between pins
DET-OUT
Discrimination output This outputs high level (4.2 SECAM MESECAM inputs, level (close inputs.
5654-5/6
LA7357 Test Input Signals Pulses
sine wave
SECAM color signal
color signal
products described contained herein intended surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment like, failure which directly indirectly cause injury, death property loss. Anyone purchasing products described contained herein above-mentioned shall: Accept full responsibility indemnify defend SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees, jointly severally, against claims litigation damages, cost expenses associated with such use: impose responsibility fault negligence which cited such claim litigation SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees jointly severally. Information (including circuit diagrams circuit parameters) herein example only; guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties. This catalog provides information July, 1997. Specifications information herein subject change without notice. 5654-6/6

Monolithic Linear LA7357 PAL/SECAM Discrimination Circuit VC

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