Rohm BA7609 Video signal switcher Datasheet

Multimedia ICs
Video signal switcher
BA7609 / BA7609F
The BA7609 and BA7609F are switching ICs developed for use in VCRs. Each contains three two-channel analog
multiplexers. As one of the switches has sync-tip clamp inputs and the other two have non-clamped inputs these ICs
are ideal for switching audio, video and chroma signals.
Applications
•Video
cassette recorders and televisions
•1)Features
Three 2-input / 1-output switches (one with sync-
4) Excellent frequency characteristics
(10MHz, 0dB Typ.).
5) Wide dynamic range (clamped input: 2.9VP-P Typ.,
non-clamped input: 3.0VP-P, Typ.).
6) Fast switching speed (50ns Typ.).
clamped inputs, the other two non-clamped).
2) 5V power supply.
3) Low power consumption (62.5mW Typ.).
•Block diagram
IN2a
1
16
IN1a
CTLa
2
15
GND
OUTa
3
14
IN2b
GND
4
13
VCC
OUTb
5
12
CTLb
OUTc
6
11
IN1b
CTLc
7
10
GND
IN2c
8
9
IN1c
CTL
Output
L
IN2
H
IN1
Sa
Sb
SC
Sa, Sb: non-clamped input
Sc: clamped input
1
Multimedia ICs
BA7609 / BA7609F
•Absolute maximum ratings (Ta = 25°C)
Symbol
Parameter
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.
•Equivalent circuits
Sa, Sb
IN
VCC
R3
13.6k
R4
200
I2
0.3mA
R12
200
R16
200
R7
100
Q5
Q9
R2
2.2k
R6
20k
Q4
R9
200
Q7
Q8
R15
200
Q10 Q11
Q3
R10
100
R11
100
R13
100
R14
100
Q2
Q12
Q1
OUT
R1
1k
2
R5
33k
I1
0.6mA
R17
12k
I4
0.6mA
I5
1mA
Multimedia ICs
BA7609 / BA7609F
Sc
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
CTL
I5
1mA
VCC
R1
50k
R6
25k
R2
200
CTL
I1
0.25mA
I2
0.6mA
Q1
Q6
R3
400
2
Q3
2
Q5
Q2
Q4
R5
25k
R4
400
I3
0.06mA
Units
:R=Ω
3
Multimedia ICs
BA7609 / BA7609F
•Electrical characteristics (unless otherwise noted, Ta = 25°C and V
Parameter
Typ.
= 5V)
Symbol
Min.
Operating voltage
VCC
4.5
5.0
Supply current
ICC
—
12.5
Maximum output level 1
Vom
2.6
2.9
—
VP-P
f = 1kHz, THD = 0.5% clamped input
Maximum output level 2
Vom
2.7
3.0
—
VP-P
f = 1kHz, THD = 0.5% non-clamped input
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 characteristic
Gf
0
1
dB
10MHz / 1MHz, VIN = 1VP-P
–3
Max.
CC
Unit
Conditions
5.5
V
—
20.0
mA
—
ZIN
14
20
26
kΩ
non-clamped input
Total-harmonic distortion
THD
—
0.007
—
%
f = 1kHz, 1VP-P non-clamped input
CTL pin switch level
VTH
2.0
2.5
3.0
V
Input impedance
Note: 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
2.48
9
2.05
4.91
10
0
3
1.76
11
2.48
4
0
12
4.91
5
1.76
13
5.00
6
0.65
14
2.48
7
4.91
15
0
8
2.05
16
2.48
Electrical characteristics
Parameter
Sync tip clamp level
Min.
Typ.
Max.
Unit
0.49
0.65
0.80
Vdc
Input impedance (no clamp)
—
20k
—
Ω
Input impedance (with clamp)
—
1.7M
—
Ω
Output impedance
—
30
—
Ω
The input coupling capacitor values should be 0.1µF to 1µF.
4
—
Multimedia ICs
BA7609 / BA7609F
•Measurement circuit
OSC
50Ω
V
105
47 / 16
105
V
1 2 3 105
VCC
50Ω
VCC
V
105
1 2 3
2 3
1
S2b
S1b
S3b
223
A
16
15
14
13
12
11
10
9
S1a
V
S1C
1 2 3
1 2 3
105
105
1
2
3
VOUTa
V
4
5
6
VOUTb VOUTc
V
V
7
8
OSC
50Ω
S2a
S3a
OSC
50Ω
105
50Ω
S2C
1 2 3 105
1 2 3
105
V
VCC
V
105
V
S3C
V
1 2 3
105
105
1 2 3
OSC
V
50Ω
VCC
Fig.1
5
Multimedia ICs
BA7609 / BA7609F
•Measurement conditions
Parameter
Current dissipation
Symbol
Switch settings
Measurement
method
S1a
S2a
S3a
S1b
S2b
S3b
S1c
S2c
S3c
ICC
2
2
2
2
2
2
2
2
2
Ammeter
Maximum
output
level
IN1a
IN2a
IN1b
IN2b
IN1c
IN2c
Vom
Vom
Vom
Vom
Vom
Vom
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
THD = 0.5%
Note 1
Voltage gain
IN1a
IN2a
IN1b
IN2b
IN1c
IN2c
GV
GV
GV
GV
GV
GV
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 = 1MHz
V = 1VP-P
Note 2
Interchannel
crosstalk
IN1a
IN2a
IN1b
IN2b
IN1c
IN2c
CT
CT
CT
CT
CT
CT
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 = 1VP-P
Note 3
Frequency
characteristic
IN1a
IN2a
IN1b
IN2b
IN1c
IN2c
Gf
Gf
Gf
Gf
Gf
Gf
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
V = 1VP-P
Note 4
CTL pin
switching level
CTLa
CTLb
CTLc
VTH
VTH
VTH
3
2
2
2
2
2
1
2
2
2
3
2
2
2
2
2
1
2
2
2
3
2
2
2
2
2
1
Note 5
Input
impedance
IN1a
IN2a
IN1b
IN2b
ZIN
ZIN
ZIN
ZIN
1
2
2
2
2
1
2
2
2
3
2
2
2
2
1
2
2
2
2
1
2
2
2
3
2
2
2
2
2
2
2
2
2
2
2
2
Note 6
IN1a
IN2a
IN1b
IN2b
THD
THD
THD
THD
3
2
2
2
2
3
2
2
2
3
2
2
2
2
3
2
2
2
2
3
2
2
2
3
2
2
2
2
2
2
2
2
2
2
2
2
Note 7
Total-harmonic
distortion
Note 1: Connect a distortion meter to the output, and input a f = 1kHz sine wave. Adjust the input 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 = 1MHz)).
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.
Note 6: Measure the input pin voltage VIN50 when a current of DC50µA is flowing into the input pin. Measure the input pin open-circuit voltage.
The input impedance is given by Z = (VIN50 - VIN0) / 50 × 10-6[Ω].
Note 7: Input a 1VP-P, 1kHz sine wave and measure the total-harmonic distortion of the output using a total-harmonic distortion meter.
6
Multimedia ICs
BA7609 / BA7609F
•External dimensions (Units: mm)
BA7609
BA7609F
10.0 ± 0.2
19.4 ± 0.3
9
0.3 ± 0.1
0.5 ± 0.1
0.11
7.62
2.54
9
1
8
1.27
0.4 ± 0.1
0.15 ± 0.1
6.2 ± 0.3
8
16
4.4 ± 0.2
1
1.5 ± 0.1
0.51Min.
3.2 ± 0.2 4.25 ± 0.3
6.5 ± 0.3
16
0.3Min.
0° ~ 15°
0.15
DIP16
SOP16
7

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