ROHM BA7649A, BA7649AF Datasheet
1
Multimedia ICs
Video signal switcher
BA7649A / BA7649AF
The BA7649A and BA7649AF are five-channel analog multiplexers (the IN5 pin can be used a mute input) designed
for use in video cassette recorders. They feature large dynamic range, and wide operating frequency range, and
have sync-tip inputs which are ideal for switching video signals.
•
Applications
Video cassette recorders and televisions
•
Features
1) 5-input / 1-output switches.
2) Built-in mute (the IN5 pin can be use a mute input).
3) Sync-tip clamp inputs.
4) Wide operating supply voltage range
(4.5V to 13.0V).
5) Low power consumption (48mW Typ.).
6) Excellent frequency characteristics
(10MHz, 0dB Typ.).
7) Wide dynamic range (3.5V
P-P Typ.).
8) Low interchannel crosstalk
( – 65dB Typ., f = 4.43MHz).
9) DIP / SOP 14 pin package.
•
Absolute maximum ratings (Ta = 25°C)
BA7649A
Parameter
Symbol Unit
V
CC 13.5 V
1100
∗
mW
°C
°C
– 25 ~ + 75
– 55 ~ + 125
Topr
Tstg
Pd
Limits
∗
Reduced by 11.0mW for each increase in Ta of 1°C over 25°C.
Power supply voltage
Allowable current
Operating temperature
Storage temperature
BA7649AF
Parameter
Symbol Unit
V
CC 13.5 V
450
∗
mW
°C
°C
– 25 ~ + 75
– 55 ~ + 125
Limits
Pd
Topr
Tstg
Power supply voltage
Allowable current
Operating temperature
Storage temperature
∗
Reduced by 4.5mW for each increase in Ta of 1°C over 25°C when mounted on a 50mm × 50mm PCB board.
2
Multimedia ICs BA7649A / BA7649AF
•
Equivalent circuits
0.8µA 100µA
Vcc
IN
D2
Q1Q2R2
100
D1
Input clamp voltage 2.1V (VCC = 5V, Typ.)
Input bias current 1µA [Typ.]
Input impedance over 1MΩ
2mA
Vcc
Q1
D1
OUT
D2
Output impedance 20Ω [Typ.]
Output DC voltage 0.55V (V
CC = 5V, Typ.)
OUTPUT
CLAMP INPUT
100 50k
20k
34k
Vcc
CTLA / B
R4
R1D2R2
R3
Q3
CTLA / CTLB
100 45k
30k
29k
Vcc
CTLC
R4
R1D2R2
R3
Q3
CTLC
•
Block diagram
1
IN1
2
GND
3
CTL A4CTL B
5
CTL C
6
IN2
7
GND
14
VOUT13GND12IN511VCC10IN49GND8IN3
Logic
•
Truth table
OUT
IN1
H IN2
H IN3
H H IN4
∗∗
H
CTLA CTLB CTLC
L (OPEN)
L (OPEN)
L (OPEN)
L (OPEN)
L (OPEN)
L (OPEN)
L (OPEN)
L (OPEN)
MUTE (IN5)
∗
Either "L (open)" or "H".
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