BA7207AS Datasheet, PDF (1/17 Pages) Rohm – SECAM chroma signal processor for VHS VCRs

Video ICs
SECAM chroma signal processor for
VHS VCRs
BA7207AS / BA7207AK
The BA7207AS and BA7207AK are LSI components that incorporate the contain circuitry required for SECAM chro-
ma signal processing. The ICs have both recording and playback systems and each includes a bell filter, a band-
pass filter, a limiter amplifier, a multiply-by-four circuit, a divide-by-four circuit, and a sync-gate circuit.
•^Applications
SECAM and VHS format video cassette recorders and
camcorders
•^Features
1) All filters required for SECAM chroma signal pro-
cessing are provided.
2) Built-in chroma killer circuit.
3) Built-in switch circuit for selecting PAL chroma or
SECAM chroma for the PB / REC system output.
•^{Absolute maximum ratings (Ta = 25°C)}
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
Power dissipation
BA7207AS
Pd
BA7207AK
7
V
1400 (SDIP32)^∗1
mW
850 (QFP44)^∗2
Operating temperature ^BA7207AS _Topr
– 25 ~ + 75
°C
BA7207AK
– 25 ~ + 65
Storage temperature
Tstg
– 55 ~ + 125
°C
∗1 Reduced by 14mW for each increase in Ta of 1°C over 25°C .
∗2 When mounted on a 70mm × 70mm, t = 1.6mm glass epoxy board, reduced by 8.5W for each
increase in Ta of 1°C over 25°C.
•^{Recommended operating conditions (Ta = 25°C)}
Parameter
Symbol Min. Typ. Max.
Unit
Operating power supply voltage VCC
4.5
5.0
5.5
V
1