ROHM BA7654F Datasheet
1
Multimedia ICs
2-input, 1-output video signal
switcher
BA7654F
The BA7654F is video signal switch consisting of two input pins (IN1 and IN2), one CTL pin (CTL), and one output
pin (OUT). The inputs are sync-tip clamped (synchronous edge of the video input signals are aligned to the same
voltage), and as the input impedance is extremely large, it is possible to use a small value for the clamp capacitor
(the recommended capacitor is 0.01µF (FZ) ceramic).
•
Applications
VCRs, TVs, and other equipment using video signals
•
Features
1) Small clamp capacitors can be used (ceramic,
3000pF (Min.), 0.01µF (FZ) (recommended)).
2) Low supply voltage operation possible supply voltage range is 3.7V to 7.7V.
3) Superimposition used for fast switching speed with
low switching noise (70ns Typ.).
4) Low power consumption
(when V
CC = 5V, 25mW Typ.).
5) Wide dynamic range (when V
CC = 5V, 3.1VP-P Typ.).
6) Excellent frequency characteristics (10MHz, 0dB
Typ.).
7) Low interchannel crosstalk (– 70dB Typ.).
8) Voltage can be applied to the control pins even
when V
CC is not applied.
•
Selected output mode setting table
CTL OUT
L IN1
H IN2
•
Absolute maximum ratings (Ta = 25°C)
Parameter Symbol Limits
9
500
∗
– 25 ~ + 75
– 55 ~ + 125
Unit
V
mW
°C
°C
V
CC
Pd
Topr
Tstg
Applied voltage
Power dissipation
Operating temperature
Storage temperature
∗
Reduced by 50mW for each increase in Ta of 1°C over 25 °C.
•
Recommended operating conditions (Ta = 25°C)
Parameter Symbol Limits
4.0
~ 7.0
Unit
VV
CCOperating power supply voltage
䊊Not designed for radiation resistance.
2
Multimedia ICs BA7654F
•
Block diagram
1IN1 GND8
2CTL OUT7
3IN2 VCC6
4GND Open.5
Logic
3
Multimedia ICs BA7654F
•
Input / output circuits (1 / 2)
Vcc
IN1
100
50µA
Pin
No.
Pin name
Reference voltage
(V
CC = 5V)
Input/output
impedance
1 1.65VIN 1 10MΩ or more
2—CTL —
3 1.65VIN 2 10MΩ or more
4—GND —
Equivalent circuit
Vcc
CTLa
1.9V
50k
2.3V
Vcc
IN1
100
50µA
GND
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