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Part: BA7654F
Category:
Multimedia
Description:
Company: ROHM Electronics
Datasheet: Download BA7654F datasheet File size : 124 kB
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BA7654F
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 VCC=5V, 25mW Typ.). 5) Wide dynamic range (when VCC=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 VCC is not applied.
!Block diagram
IN1
1
8
GND
CTL
2
7
OUT
IN2
3
6
VCC
Logic
GND
4
5
Open.
BA7654F
Multimedia ICs
!Selected output mode setting table
CTL L H OUT IN1 IN2
!Absolute maximum ratings (Ta=25°C)
Parameter Applied voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 9 500 -25 +75 -55 +125 Unit V mW °C °C
Reduced by 50mW for each increase in Ta of 1°C over 25°C.
!Recommended operating conditions (Ta=25°C)
Parameter Operating power supply voltage
Not designed for radiation resistance.
Symbol VCC
Limits 4.0 7.0
Unit V
BA7654F
Multimedia ICs
!Input / output circuits
Pin No. Pin name Reference voltage (VCC = 5V) Input / output impedance
Vcc
Equivalent circuit
1
IN 1
1.65V
10M or more
IN1 100 50µA
Vcc
2.3V
2
CTL
-
-
50k CTLa
1.9V
Vcc
3
IN 2
1.65V
10M or more
IN1 100 50µA
GND
4
GND
-
-
BA7654F
Multimedia ICs
Pin No. Pin name Reference voltage (VCC = 5V) Input / output impedance Equivalent circuit
Vcc
6
VCC
0.5V
-
Vcc
7
OUT
0.95V
26
ImA
OUT
Vcc
8
GND
0V
-
GND
BA7654F
Multimedia ICs
!Electrical characteristics (Unless otherwise noted, Ta=25°C, VCC=5.0V)
Parameter Power supply voltage Circuit current Maximum output level Voltage gain Interchannel crosstalk Frequency characteristics CTL switching voltage Symbol VCC ICC Vom GV Cta Gf VthL VthH Min. 3.7 2.7 2.6 -0.5 - -3.0 - 2.5 Typ. - 5.0 3.1 0 -70 0 - - Max. 7.7 8.2 - +0.5 - +1.0 1.0 - Unit V mA VP-P dB dB dB V Conditions - - f=1kHz, THD=1.0% f=1MHz, VIN=1.0VP-P f=4.43MHz, VIN=1.0VP-P f=10MHz/1MHz, VIN=1.0VP-P
Vcc-CTL Threshold Level
Vth = Vcc-VF × 20 (V) 45
!Guaranteed design parameters (Unless otherwise noted, Ta=25°C, VCC=5V)
Parameter Differential gain Differential phase Symbol DG DP Min. - - Typ. 0 0.5 Max. 0.5 1.0 Unit % deg Conditions VIN=1.0VP-P standard staircase signal VIN=1.0VP-P standard staircase signal
!Measurement circuit
SW7
1
2
1 Clump SW2 2 Clump 1 2
8
V
Vector Scorp
7
Vcc 1.0V 2.5V 3 6 C10 Logic C11
A
0.1µ 47µ
4
5
Open
SW1
SW3
1 C1 C2 3300p
2 C3 3300p
3 C4 3300p 1.0V
1 C5 3300p
2 C6 3300p
3
3300p
SG
OSC OSC
SG
Fig. 1
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