BA7653AF Datasheet, PDF (1/6 Pages) Rohm – Video signal switcher, 1 x 3-channel with clamped-input

Multimedia ICs
Video signal switcher, 1 × 3-channel
with clamped-input
BA7653AF
The BA7653AF is a video-signal switching IC that contains a three-channel clamped-input multiplexer. 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
Video cassette recorders, television and camcorders
•^Features
1) Small clamp capacitors can be used (ceramic,
3000pF (Min.), 0.01µF (FS) (recommended)).
2) Low supply voltage operation possible. Supply volt-
age range is 3.7V to 7.7V.
3) Superimposition used for fast switching speed with
low switching noise (70nsec. Typ.).
4) Low power consumption (when VCC = 5V, 25mW
Typ.).
5) Wide dynamic range (3.1VP-P Typ. for VCC = 5V).
6) Excellent frequency characteristics (10MHz, 0dB
Typ.).
7) Low interchannel crosstalk ( – 70dB Typ.).
8) Voltage can be applied to the control pins even
when VCC is not applied.
•^{Absolute maximum ratings (Ta = 25°C)}
Parameter
Symbol
Limits
Unit
Applied voltage
Power dissipation
VCC
9
V
Pd
500^∗
mW
Operating temperature
Topr
– 25 ~ + 75
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
∗ When mounted on a 50mm × 50mm board, reduced by 5mW for each increase in Ta of 1°C over 25°C.
•^{Recommended operating conditions (Ta = 25°C)}
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
4.0 ~ 7.0
V
1