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BA7603/F-E
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
Video cassette recorders and televisions
• Features
1) Three 2-input / 1-output switches.
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
Symbol
Limits
Unit
V
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
*
V CC
9
500 *
Pd
mW
Topr
Tstg
– 40 ~ + 85
– 55 ~ + 125
° C
° C
Reduced by 5.0mW for each increase in Ta of 1
C over 25
°
C.
• Block diagram
IN2a
1
16
IN1a
CTLa
2
15
GND
OUTa
3
14
IN2b
GND
4
13
V CC
OUTb
5
12
CTLb
CTL
Output
OUTc
6
11
IN1b
L
H
IN 2
IN 1
CTLc
7
10
GND
IN2c
8
9
IN1c
SW a , SW b , SW c : pedestal-clamped input
1
°
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Multimedia ICs
BA7603 / BA7603F
• Equivalent circuits
SWa, SWb, SWc
IN
V CC
R3
22k
I2
0.3mA
R12
200
R16
200
Q5
R7
100
R2
4k
Q9
Q6
R9
200
Q7 Q8
Q10 Q11
R15
200
Q3
R10
100
R11
100
R13
100
R14
100
Q2
Q12
Q1
OUT
R1
1k
R8
25k
I1
0.6mA
R17
12k
I4
0.6mA
I5
1mA
CTL
V CC
R1
50k
R6
25k
R2
200
I2
0.6mA
CTL
Q1
Q6
Q3
Q5
Q2 Q4
R5
25k
I1
0.25mA
R3
400
R4
400
I3
0.06mA
2
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Multimedia ICs
BA7603 / BA7603F
• Electrical characteristics (unless otherwise noted Ta = 25°C and V CC = 5V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Operating voltage
Supply current
Maximum output level
Voltage gain
Interchannel crosstalk
Frequency characteristics
CTL pin switch level
*
V CC
4.5
5.0
5.5
V
—
—
I CC
—
13.0
20.0
mA
V om
2.7
2.9
—
V P-P
f = 1kHz, THD = 0.5%
G V
– 0.5
0
0.5
dB
f = 1MHz, V IN = 1V P-P
C T
—
– 65
—
dB
f = 4.43MHz, V IN = 1V P-P
G f
– 3
0
1
dB
10MHz / 1MHz, V = 1V P-P
V TH
2.0
2.5
3.0
V
—
Refer to the measurement circuit given in Fig. 1.
• Reference data
Pin DC voltages (reference values)
Units: Vdc
Pin No.
DC voltage
Pin No.
DC voltage
1
2.05
9
2.05
2
4.91
10
0
3
0.65
11
2.05
4
0
12
4.91
5
0.65
13
5.00
6
0.65
14
2.05
7
4.91
15
0
8
2.05
16
2.05
Electrical characteristics
Parameter
Min.
Typ.
Max.
Unit
Sync tip clamp level
Input impedance (with clamp)
Output impedance
The input coupling capacitor values should be 0.1
0.49
0.65
0.80
Vdc
—
1.7M
—
W
—30
—
W
m F to 1 m F.
3
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Multimedia ICs
BA7603 / BA7603F
• Measurement circuit
OSC
50
W
50
W
V CC
V
V
105
V
105
123
105
123
123
105
223
47 / 16
S 2b
S 3b
S 1b
V CC
A
16
15
14
13
12
11
10
9
S 1a
S 1c
V
123 105
105
1
2
3
4
5
6
7
8
V
123 105
105
V OUTa
V OUTb
V OUTc
OSC
V
V
V
OSC
50
W
50
W
S 2a
S 3a
S 2C
123 105
105
12 3
S 3c
123 105
105
V
V
V
12 3
OSC
V CC
OSC
V
50
W
50
W
V CC
Fig.1
4
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Multimedia ICs
BA7603 / BA7603F
• Measurment conditions
Switch settings
Measurement
method
Parameter
Symbol
S 1a
S 2a
S 3a
S 1b
S 2b
S 3b
S 1c
S 2c
S 3c
Current dissipation
I CC
2
2
2
2
2
2
2
2
2
I N1a
I N2a
I N1b
I N2b
I N1C
I N2C
V om
V om
V om
V om
V om
V om
3
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
3
f = 1kHz,
Maximum
output
level
THD = 0.5%
Note 1
I N1a
I N2a
I N1b
I N2b
I N1c
I N2c
G V
G V
G V
G V
G V
G V
3
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
3
f = 1kHz,
V = 1V P-P
Voltage
gain
Note 2
Inter-
channel
crosstalk
I N1a
I N2a
I N1b
I N2b
I N1c
I N2c
C T
C T
C T
C T
C T
C T
2
3
2
2
2
2
3
2
2
2
2
2
2
3
2
2
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
3
2
2
2
2
3
2
2
2
2
2
2
3
f = 4.43MHz,
V = 1V P-P
Note 3
I N1a
I N2a
I N1b
I N2b
I N1c
I N2c
G f
G f
G f
G f
G f
G f
3
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
2
3
2
2
2
2
2
3
f = 10MHz / f = 1MHz,
Frequency
character-
istic
V = 1V P-P
Note 4
CTL pin
switching
level
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 .
CTLa
CTLb
CTLc
V TH
V TH
V TH
1
2
2
2
2
2
1
2
2
2
1
2
2
2
2
2
1
2
2
2
1
2
2
2
2
2
1
Note 5
5
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