Rohm BA7603 Video signal switcher Datasheet

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
•1)Features
Three 2-input / 1-output switches.
5) Excellent frequency characteristics
(10MHz, 0dB Typ.).
6) Wide dynamic range (2.9VP-P Typ.).
7) Fast switching speed (50ns Typ.).
2) Sync-tip clamped inputs.
3) 5V power supply.
4) Low power consumption (62.5mW Typ.).
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
9
V
Power dissipation
Pd
500∗
mW
Operating temperature
Topr
– 40 ~ + 85
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
∗ Reduced by 5.0mW for each increase in Ta of 1°C over 25°C.
•Block diagram
1
16 IN1a
CTLa
2
OUTa
3
14 IN2b
GND
4
13 VCC
OUTb
5
OUTc
6
CTLc
7
IN2c
8
SWa
IN2a
15 GND
SWb
12 CTLb
SWc
11 IN1b
CTL
L
H
Output
IN 2
IN 1
10 GND
9
IN1c
SWa, SWb, SWc: pedestal-clamped input
1
Multimedia ICs
BA7603 / BA7603F
•Equivalent circuits
SWa, SWb, SWc
IN
VCC
I2
0.3mA
R3
22k
Q5
R12
200
R16
200
R7
100
Q9
R2
4k
Q6
R9
200
Q7
Q8
R15
200
Q10 Q11
Q3
R10
100
R11
100
R13
100
R14
100
Q2
Q12
Q1
OUT
I1
0.6mA
R8
25k
R1
1k
I4
0.6mA
R17
12k
I5
1mA
CTL
VCC
R1
50k
R6
25k
R2
200
CTL
I1
0.25mA
2
I2
0.6mA
Q1
Q6
R3
400
Q3
Q5
Q2
Q4
R5
25k
R4
400
I3
0.06mA
Multimedia ICs
BA7603 / BA7603F
•Electrical characteristics (unless otherwise noted Ta = 25°C and V
Parameter
Operating voltage
CC
= 5V)
Symbol
Min.
Typ.
Max.
Unit
Conditions
VCC
4.5
5.0
5.5
V
—
Supply current
ICC
—
13.0
20.0
mA
—
Maximum output level
Vom
2.7
2.9
—
VP-P
f = 1kHz, THD = 0.5%
Voltage gain
GV
– 0.5
0
0.5
dB
f = 1MHz, VIN = 1VP-P
Interchannel crosstalk
CT
—
– 65
—
dB
f = 4.43MHz, VIN = 1VP-P
Frequency characteristics
Gf
–3
0
1
dB
10MHz / 1MHz, V = 1VP-P
CTL pin switch level
VTH
2.5
3.0
V
2.0
—
∗ Refer to the measurement circuit given in Fig. 1.
data
•PinReference
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
0.49
0.65
0.80
Vdc
Input impedance (with clamp)
—
1.7M
—
Ω
Output impedance
—
30
—
Ω
Sync tip clamp level
The input coupling capacitor values should be 0.1µF to 1µF.
3
Multimedia ICs
BA7603 / BA7603F
•Measurement circuit
OSC
50Ω
50Ω
VCC
V
V
105
1
105
V
2
3
105
1
2
1
3
2
3
105
223
S2b
47 / 16
VCC
S1b
S3b
A
16
15
14
13
12
11
9
10
S1a
1
2
S1c
3 105
1
105
V
1
2
3
4
VOUTa
OSC
5
VOUTb
V
V
6
V
V
OSC
50Ω
S3a
S2a
2
S2C
1
3 105
105
2
3
S3c
1
50Ω
2
3 105
V
2
VCC
OSC
1
105
V
V
3
OSC
V
50Ω
VCC
Fig.1
4
3 105
VOUTc
50Ω
1
2
105
8
7
Multimedia ICs
BA7603 / BA7603F
•Measurment conditions
Switch settings
Parameter
Symbol
Current dissipation
IN1a
IN2a
Maximum
IN1b
output
IN2b
level
IN1C
IN2C
IN1a
IN2a
IN1b
Voltage
IN2b
gain
IN1c
IN2c
IN1a
IN2a
InterIN1b
channel
IN2b
crosstalk
IN1c
IN2c
IN1a
IN2a
Frequency
IN1b
characterIN2b
istic
IN1c
IN2c
CTL pin
CTLa
switching
CTLb
CTLc
level
ICC
Vom
Vom
Vom
Vom
Vom
Vom
GV
GV
GV
GV
GV
GV
CT
CT
CT
CT
CT
CT
Gf
Gf
Gf
Gf
Gf
Gf
VTH
VTH
VTH
S1a
S2a
S3a
S1b
S2b
S3b
S1c
S2c
S3c
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
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
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
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
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
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
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
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
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 = 1VP-P
Note 2
f = 4.43MHz,
V = 1VP-P
Note 3
f = 10MHz / f = 1MHz,
V = 1VP-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 Vom (VP-P).
Note 2: Input a 1VP-P, 1MHz sine wave. The voltage gain is given by GV = 20 log (VOUT / VIN).
Note 3: Input a 1VP-P, 4.43MHz sine wave. The interchannel crosstalk is given by CT = 20 log (VOUT / VIN).
Note 4: Input 1VP-P, 1MHz and 10MHz sine waves. The frequency characteristic is given by Gf = 20 log (VOUT (f = 10MHz) / VOUT (f = 10MHz)).
Note 5: Input a 1VP-P, 1MHz sine wave. Reduce the CTL pin voltage from VCC.
The CTL pin switching level (VTH) is the CTL pin voltage at which the VOUT level drops below 20mVP-P.
5
Multimedia ICs
BA7603 / BA7603F
•External dimensions (Units: mm)
BA7603
BA7603F
10.0 ± 0.2
19.4 ± 0.3
8
0.51Min.
0.11
6.2 ± 0.3
0.3 ± 0.1
0.5 ± 0.1
1.5 ± 0.1
3.2 ± 0.2 4.25 ± 0.3
7.62
2.54
9
1
8
1.27
0.4 ± 0.1
0.15 ± 0.1
1
16
4.4 ± 0.2
9
6.5 ± 0.3
16
0.3Min.
0° ~ 15°
0.15
DIP16
6
SOP16

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