Multimedia ICs
Video signal switcher
BA7603 / BA7603F
The BA7603 and BA7603F are switching ICs developed for use in VCRs. Each contains three two-channel analog
multi-plexers. The switches have sync-tip clamped inputs and are ideal for switching video signals.
•
Applications recorders and televisions
Video cassette
•
Features / 1-output switches.
1) Three 2-input
2) Sync-tip clamped inputs.
3) 5V power supply.
4) Low power consumption (62.5mW Typ.).
5) Excellent frequency characteristics
(10MHz, 0dB Typ.).
6) Wide dynamic range (2.9V
P-P
Typ.).
7) Fast switching speed (50ns Typ.).
•
Absolute maximum ratings (Ta = 25°C)
Parameter
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
Symbol
V
CC
Pd
Topr
Tstg
Limits
9
500
∗
– 40 ~ + 85
– 55 ~ + 125
Unit
V
mW
°C
°C
∗
Reduced by 5.0mW for each increase in Ta of 1°C over 25°C.
•
Block diagram
IN2a
CTLa
OUTa
GND
OUTb
OUTc
CTLc
IN2c
1
SWa
2
3
4
SWb
5
6
7
8
16 IN1a
15 GND
14 IN2b
13 V
CC
12 CTLb
11 IN1b
10 GND
9
IN1c
CTL
L
H
Output
IN 2
IN 1
SWc
SW
a
, SW
b
, SW
c
:
pedestal-clamped input
1
Multimedia ICs
BA7603 / BA7603F
•
Equivalent circuits
SWa, SWb, SWc
IN
V
CC
R3
22k
Q5
R2
4k
R7
100
Q9
Q6
I2
0.3mA
R12
200
R16
200
R9
200
Q7
Q8
Q10 Q11
R15
200
Q3
R10
100
Q2
Q12
Q1
OUT
R1
1k
R8
25k
I1
0.6mA
R17
12k
I4
0.6mA
I5
1mA
R11
100
R13
100
R14
100
CTL
V
CC
R1
50k
I2
0.6mA
Q1
Q6
R6
25k
R2
200
CTL
Q3
Q5
Q2
Q4
R5
25k
I1
0.25mA
R3
400
R4
400
I3
0.06mA
2
Multimedia ICs
BA7603 / BA7603F
CC
•
Electrical characteristics (unless otherwise noted Ta = 25°C and V
Parameter
Operating voltage
Supply current
Maximum output level
Voltage gain
Interchannel crosstalk
Frequency characteristics
CTL pin switch level
Symbol
V
CC
I
CC
V
om
G
V
C
T
G
f
V
TH
Min.
4.5
—
2.7
– 0.5
—
–3
2.0
Typ.
5.0
13.0
2.9
0
– 65
0
2.5
Max.
5.5
20.0
—
0.5
—
1
3.0
= 5V)
Conditions
—
—
f = 1kHz, THD = 0.5%
f = 1MHz, V
IN
= 1V
P-P
f = 4.43MHz, V
IN
= 1V
P-P
10MHz / 1MHz, V = 1V
P-P
—
Unit
V
mA
V
P-P
dB
dB
dB
V
∗
Refer to the measurement circuit given in Fig. 1.
•
Reference data(reference values)
Pin DC voltages
Pin No.
1
2
3
4
5
6
7
8
DC voltage
2.05
4.91
0.65
0
0.65
0.65
4.91
2.05
Pin No.
9
10
11
12
13
14
15
16
Units: Vdc
DC voltage
2.05
0
2.05
4.91
5.00
2.05
0
2.05
Electrical characteristics
Parameter
Sync tip clamp level
Input impedance (with clamp)
Output impedance
Min.
0.49
—
—
Typ.
0.65
1.7M
30
Max.
0.80
—
—
Unit
Vdc
Ω
Ω
The input coupling capacitor values should be 0.1
µ
F to 1
µ
F.
3
Multimedia ICs
BA7603 / BA7603F
•
Measurement circuit
OSC
50Ω
V
CC
V
105
50Ω
V
V
3
105
1
2
3
1
105
1
2
2
3
105
223
47 / 16
V
CC
A
S
2b
S
3b
S
1b
16
15
14
13
12
11
10
9
S
1a
S
1c
1
V
OSC
105
2
3 105
1
2
3
V
OUTa
V
50Ω
4
5
V
OUTb
V
V
OUTc
V
OSC
6
7
8
V
1
105
2
3 105
50Ω
S
2a
S
3a
S
2C
1
105
V
OSC
2
3 105
V
1
2
3
S
3c
V
1
2
3
OSC
V
1
105
2
3 105
V
CC
50Ω
50Ω
V
CC
Fig.1
4
Multimedia ICs
BA7603 / BA7603F
•
Measurment conditions
Switch settings
Parameter
Current dissipation
I
N1a
I
N2a
Maximum
I
N1b
output
I
N2b
level
I
N1C
I
N2C
I
N1a
I
N2a
I
N1b
Voltage
I
N2b
gain
I
N1c
I
N2c
I
N1a
I
N2a
Inter-
I
N1b
channel
I
N2b
crosstalk
I
N1c
I
N2c
I
N1a
I
N2a
Frequency
I
N1b
character-
I
N2b
istic
I
N1c
I
N2c
CTL pin
CTLa
switching
CTLb
CTLc
level
Symbol
I
CC
V
om
V
om
V
om
V
om
V
om
V
om
G
V
G
V
G
V
G
V
G
V
G
V
C
T
C
T
C
T
C
T
C
T
C
T
G
f
G
f
G
f
G
f
G
f
G
f
V
TH
V
TH
V
TH
S
1a
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
3
2
2
2
2
2
1
2
2
S
2a
2
2
3
2
2
2
2
2
3
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
2
2
S
3a
2
2
3
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
1
2
2
S
1b
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
3
2
2
2
2
1
2
S
2b
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
S
3b
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
1
2
S
1c
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
3
2
2
2
1
S
2c
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
S
3c
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
3
2
2
1
Measurement
method
f = 1kHz,
THD = 0.5%
Note 1
f = 1kHz,
V = 1V
P-P
Note 2
f = 4.43MHz,
V = 1V
P-P
Note 3
f = 10MHz / f = 1MHz,
V = 1V
P-P
Note 4
Note 5
Note 1: Connect a distortion meter to the output, and input a f = 1kHz sine wave. Adjust the output level until the output distortion is 0.5%.
This output voltage at this time is the maximum output level V
om
(V
P-P
).
Note 2: Input a 1V
P-P
, 1MHz sine wave. The voltage gain is given by G
V
= 20 log (V
OUT
/ V
IN
).
Note 3: Input a 1V
P-P
, 4.43MHz sine wave. The interchannel crosstalk is given by C
T
= 20 log (V
OUT
/ V
IN
).
Note 4: Input 1V
P-P
, 1MHz and 10MHz sine waves. The frequency characteristic is given by G
f
= 20 log (V
OUT
(f = 10MHz) / V
OUT
(f = 10MHz)).
Note 5: Input a 1V
P-P
, 1MHz sine wave. Reduce the CTL pin voltage from V
CC
.
The CTL pin switching level (V
TH
) is the CTL pin voltage at which the V
OUT
level drops below 20mV
P-P
.
5
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