|
ROHM Semiconductor |
Multimedia ICs
Video signal switcher for AV amplifiers
BA7626 / BA7626F
The BA7626 and BA7626F are video signal switches that contain two five-channel analog multiplexers for switching
chroma and audio signals, and two wide-band 6dB amplifiers. By simply adding transistor buffers to the outputs, it is
possible to construct a record / playback switch for two record / playback VCRs, and three video playback machines
(eg. laser desk players). Input switching and VCR record switching can be done independently. The inputs are termi-
nated with 20kΩ resistors, and are suitable for switching chroma and audio signals.
•Applications
AV amplifiers (audio signals and S-pin chroma signals) and video selectors
•Features
1) 5-input / 3-output switches.
2) 20kΩ input impedance.
3) Built-in 6dB amplifiers.
4) 5V supply voltage.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Power supply voltage
VCC
Power dissipation
Pd
Operating temperature
Topr
Storage temperature
Tstg
∗ Reduced by 5.0mW for each increase in Ta of 1°C over 25°C.
Limits
9
500∗
– 25 ~ +70
– 55 ~ +125
Unit
V
mW
°C
°C
1
Multimedia ICs
•Block diagram
Monitor OUT 1
GND 2
IN5 3
GND 4
IN4 5
CTL E 6
IN3 7
CTL D 8
6dB
logic
6dB
logic
16 IN1
15 CTL A
14 VCC
13 VCC
12 IN2
11 CTL B
10 VOUT2
9 CTL C
BA7626 / BA7626F
•Truth table
ABE
LL∗
HL∗
LH∗
HH L
Monitor OUT
IN1
IN2
IN3
IN4
HHH
IN5
∗Note 1: indicates "don't care" (H or L).
CDE
LL∗
HL∗
LH∗
HH L
HHH
VOUT1
—
IN2
IN3
IN4
IN5
CDE
LL∗
HL∗
LH∗
HH L
HHH
VOUT2
IN1
—
IN3
IN4
IN5
2
|