TECHNICAL NOTE
High-performance Video Signal Switchers
Single Circuit
Video Signal Switcher
BA7654F, BA7653AF/AFV ,BA7652AF
Description
The BA7654F, BA7653AF/AFV, or BA7652AF is a video signal (display signal) switch containing one 2-input or 3-input
circuit.
Each of the input pin formats is “sync-tip clamp input” that matches the synchronous tips of video signals (display signals) to
the same potential. The inputs have an high input impedance configuration, in which they can utilize a small clamp capacitor
(0.01 F (FZ) ceramic capacitor is recommended).
Features
1) Low value clamp capacitance can be used (Min. 3000 pF Recommended 0.01 F (FZ) ceramic capacitor)
2) Low voltage operation is possible (Operating range 4.0 7.0V)
3) Superimposed can be applied since switching speed of SW is fast and there is little switching noise (Typ. 70ns)
4) Low power consumption (Typ. 25mW when Vcc=5V)
5) Large dynamic range (Typ. 3.1V
P-P
when Vcc=5V)
6) Good frequency characteristics (Typ. 10 MHz 0 dB)
7) Low interchannel crosstalk (Typ. –70 dB)
8) Voltage can be applied to the CTL pin without a VCC voltage.
9) Built-in mute function (BA7652AF)
Applications
VCR, TV, and other applications that use display signals.
Product lineup
Part No.
BA7654F
BA7653AF/AFV
BA7652AF
Input type
2 in 1 Circuit
3 in 1 Circuit
3 in 1 Circuit
Mute
Supply voltage(V)
4.0
7.0
Aug.2008
Absolute maximum ratings
Ta=25
Limits
BA7653AF
BA7653AFV
9
Parameter
Supply voltage
Symbol
V
CC
BA7654F
BA7652AF
Unit
V
Power dissipation
P
d
500*
1
500*
1
350*
2
500*
1
mW
Operating temperature
T
opr
-25 +75
-30 +80
-30 +80
-30 +80
Storage temperature
T
stg
-55 +125
1
* Reduce by 5.0mW/qC over 25qC, when mounted on a 50mm50mm PCB board.(BA7654F, BA7653AF, BA7652AF)
2
* Reduce by 3.5mW/qC over 25qC, when mounted on a 50mm50mm PCB board.(BA7653AFV)
Operating range
Ta=25
Parameter
Symbol
Limits
Unit
V
Supply voltage
V
CC
4.0
7.0
Note: This IC is not designed to be radiation-resistant.
Electrical characteristics
Unless otherwise noted,
Symbol
I
CC
V
om
G
V
C
ta
C
f
V
TH L
V
TH H
Min.
2.7
2.6
-0.5
-3.0
2.5
Ta=25 , Vcc=5.0V
Typ.
5.0
3.1
0
-70
0
Max.
8.2
+0.5
+1.0
1.0
Unit
mA
V
P-P
dB
dB
dB
V
Conditions
f=1kHz, THD=1.0
f=1MHz, V
IN
=1.0V
P-P
f=4.43MHz, V
IN
=1.0V
P-P
f=10MHz/1MHz, V
IN
=1.0V
P-P
V
TH
=
Vcc-0.75
0.44
Parameter
Circuit current
Maximum output level
Voltage gain
Inter channel crosstalk
Frequency characteristics
CTL switching voltage
Guaranteed design parameters
(Unless otherwise noted, Ta=25 , Vcc=5.0V
Parameter
Differential phase
Differential gain
Symbol
D
G
D
P
Min.
Typ.
0
0.5
Max.
0.5
1.0
Unit
deg
Conditions
V
IN
=1.0V
P-P
, standard staircase signal
V
IN
=1.0V
P-P
, standard staircase signal
2/8
Block diagram
IN1
1
8
GND
CTL
2
7
OUT
IN2
3
Logic
6
V
CC
GND
4
5
Open.
Fig.1
BA7654F
Fig.2
BA7653AF/AFV
Fig.3
BA7652AF
Control Pin Settings
BA7654F
CTL
L
H
OUT
IN1
IN2
CTLa
L
H
L
H
BA7653AF/AFV
CTLb
L
L
H
H
OUT
IN1
IN2
IN3
IN3
CTLa
L
H
L
H
BA7652AF
CTLb
L
L
H
H
OUT
IN1
IN2
IN3
MUTE
3/8
Pin descriptions
1/2 (BA7654F)
BA7654F
Pin No.
Pin name
DC voltage
Vcc=5V
Input/output
impedance
Equivalent circuit
1
(3)
IN1
1.65V
(IN2)
10M
or more
IN1
(IN2)
2
CTL
CTL
4
GND
(8)
0V
5
N.C.
open
open
6
Vcc
5V
7
OUT
0.95V
26
4/8
Pin descriptions
2/2 (BA7653AF/53AFV/52AF)
BA7653AF/53AFV/52AF
Pin No.
Pin name
DC voltage
Vcc=5V
Input/output
impedance
Equivalent circuit
1
(3)
(5)
IN1
(IN2)
(IN3)
1.65V
10M
or more
IN1
(IN2)
(IN3)
2
CTLa
CTLa
4
CTLb
6
Vcc
5.0V
7
OUT
0.95V
26
8
GND
0V
5/8