1
Multimedia ICs
Audio / video switch for CANAL - Plus
decoder
BH7634AS
The BH7634AS is one-chip IC that contains audio and video switches that support 21-pin SECAM and PAL connec-
tors.
The I
2
C BUS for switch control simplifies applications, while the two expansion ports allow up to two external inputs.
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Applications
VCRs
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Features
1) I
2
C BUS control.
2) Video input is sync tip clamped, and includes a
small-capacity (0.022m F) input capacitor.
3) Three FSCOUT values.
4) Two expansion ports.
5) Audio mute function.
6) 75W driver output (pins 20 and 23) requires no
attached capacitor.
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Absolute maximum ratings (Ta = 25°C)
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
*
Reduce by 12mW for each increase in Ta of 1°C over 25°C.
Parameter Symbol Limits Unit
VCC 13.5 V
Pd 1200 mW
Topr – 25 ~ + 60 °C
Tstg – 55 ~ + 125 °C
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Recommended operating conditions (Ta = 25°C)
Parameter
VCC 8.5 13 V12
Symbol Min. Typ. Max. Unit
Operating power supply voltage