ROHM BA7631F, BA7631 Datasheet

1

Multimedia ICs

Video switch for CANAL-Plus decoder

BA7631 / BA7631F

The BA7631 and BA7631F are audio-switching ICs for decoders for scrambled pay channels used in France and
other countries. The ICs include a five-input multiplexer, a four-input multiplexer and a two-input multiplexer, and
allow decoder audio switching to be done with a single IC. When used in combination with the BA7630S common
logic control can be used for audio and video switching.

•

Applications

Video cassette recorders

•

Features

1) All the audio-switching functions required for SECAM
CANAL -plus decoder integrated onto one chip.

2) Inputs terminated with 65kΩ resistors.

3) Built-in output buffer.

4) Wide supply voltage range (4.5V to 13.0V).

5) Low total harmonic distortion (0.005% Typ.).

6) Wide dynamic range (3.6Vrms, V

CC = 12V).

7) Same control logic as for the BA7630S can be used.

•

Absolute maximum ratings

Parameter

Symbol

Limits Unit

V

CC

13.5 V
mV

°C
°C

1100

∗

(DIP)

500

∗

(SOP)

– 55 ~ + 125

– 25 ~ + 70

Pd

Topr
Tstg

∗

Reduced by 11mW (DIP) or 5mW (SOP) for each increase in Ta of 1°C over 25°C.

Applied voltage
Power dissipation
Operating temperature

Storage temperature

•

Recommended operating conditions (Ta = 25°C)

Parameter Symbol Limits Unit

V

CC

4.5 ~ 13.0 VPower supply voltage

2

Multimedia ICs BA7631 / BA7631F

•

Block diagram

1

2

3

4

5

6

7

89

10

11

12

13

14

15

16

BF

BF

BF

1
2
3
4

SW2

1
2
3
4
5

SW1

1
2

SW3

BA7631

OUT1

CTL4

IN5

V

CC

IN4

GND2

IN1

CTL1

OUT2

CTL5

CTL3

OUT3

CTL2

IN3

GND1

IN2

3

Multimedia ICs BA7631 / BA7631F

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Truth table

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Pin descriptions

CTL1 CTL2 CTL5 SELECT

LLLIN1
L H L IN2
H L L IN3
H H L MUTE

∗∗H IN5

OUT1 SW1 block

∗

Don't care

CTL3 CTL5 SELECT

LL
HL
LH
HH

IN1
IN3
IN5
IN3

OUT2 SW2 block

CTL4 SELECT

L

H

IN2
IN4

OUT3 SW3 block

1
2
3
4
5
6
7
8

9
10
11
12
13
14
15
16 OUT2

CTL5

CTL3

OUT3

CTL2

IN3

GND1

IN2

CTL1

IN1

GND2

IN4

V

CC

IN5

CTL4

OUT1

Pin No.

FunctionPin name
Output 1
Control 4
Input 5
Power supply
Input 4
GND (GND1 common)
Input 1
Control 1
Input 2
GND (GND2 common)
Input 3
Control 2
Output 3
Control 3
Control 5
Output 2