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1
Multimedia ICs
Video signal switcher
BA7604N
The BA7604N is a switching IC developed for use in VCRs. It has two-channel analog multiplexers, and features
wide dynamic range, and wide operating frequency range, and is suitable for switching audio and video signals.
•
Applications
VCRs and TVs
•
Features
1) Two 2-input / 1-output switches.
2) 5V power supply.
3) Low power consumption (42mW Typ.).
4) Excellent frequency characteristics
(10MHz, 0dB, Typ.).
5) Wide dynamic range (3.0V
P-P Typ.).
6) High input impedance (20kΩ Typ.).
7) Fast switching speed (50ns Typ.).
•
Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol Limits Unit
9V
mW
°C
°C
500
∗
VCC
Topr
Pd
Tstg
– 40 ~ + 85
– 55 ~ + 125
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
∗
Reduced by 5.0mW for each increase in Ta of 1°C over 25°C.
•
Block diagram
Sa Sb
12345678910
IN1a
VCCIN2a
CTLa
OUTa
OUTb
CTLb
IN2b
GND
IN1b
L IN2
H IN1
CTL Output
Sa, Sb: Non-clamped
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Multimedia ICs BA7604N
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Equivalent circuits
R3
13.6k
R4
200
R5
33k
R17
12k
I1
0.6mA
I2
0.3mA
I4
0.6mA
I5
1mA
R7
100
R10
100
R11
100
R13
100
R14
100
R9
200
R6
20k
R12
200
R16
200
R15
200
R2
2.2k
R1
1k
Q4
Q5
Q7 Q8 Q10 Q11
Q12
Q9
Q3
Q2
Q1
OUT
V
CC
IN
Sa, Sb
R3
400
R4
400
R5
25k
R2
200
Q3
Q1
Q5
Q6
Q2 Q4
CTL
R6
25k
R1
50k
V
CC
I2
0.6mA
I1
0.25mA
I3
0.06mA
CTL
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Multimedia ICs BA7604N
•
Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 5.0V)
Parameter Symbol Typ. Max. Unit Conditions
V
CC 4.5 5.0 5.5 V —
I
CC — 8.4 13.0 mA —
2.7 3.0 — f = 1kHz, THD = 0.5%
G
V – 0.5 0 dB
C
T — – 65 — dB
– 3 0 dB
THD — 0.007 — %
V
TH 2.0 2.5 3.0 V —
14 20 26 kΩ —Z
IN
Gf
Vom
f = 1MHz, VIN = 1VP-P
f = 4.43MHz, VIN = 1VP-P
f = 1MHz, VIN = 1VP-P
10MHz / 1MHz, VIN = 1VP-P
0.5
1
V
P-P
Min.
Note: Refer to the measurement circuit given in Fig. 1.
Operating voltage
Supply current
Maximum output level
Voltage gain
Interchannel crosstalk
Frequency characteristic
Total-harmonic distortion
CTL pin switch level
Input impedance
•
Reference data
Pin DC voltages (reference values)
1 2.48
90
2 5.00
10 2.48
3 2.48
4 4.91
5 1.76
6 1.76
7 4.91
8 2.48
Pin No. DC voltage DC voltagePin No.
Units: Vdc
Electrical characteristics
Parameter
— 20k — Ω
—30— Ω
Min. Typ. Max. Unit
Input impedance (no clamp)
Output impedance
The input coupling capacitor values should be 0.1µF to 1µF.
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Multimedia ICs BA7604N
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Measurement circuit
V V
A1
1
2345
678910
VCC
223
47µ
S1a S2a S3a S3b S2b S1b
321321321321321321
VCCVCC
VIN2b VIN1b
OSC OSC
RR
OSC OSC
RR
R = 75Ω
105
105
105
105
VIN2aVIN1a
105
105
105
105
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Multimedia ICs BA7604N
S1a S2a S3a S1b S2b S3b
ICC 222222
I
N1a
IN2a
IN1b
IN2b
Vom
Vom
Vom
Vom
3
2
2
2
2
3
2
2
2
3
2
2
2
2
3
2
2
2
2
3
2
2
2
3
I
N1a
IN2a
IN1b
IN2b
GV
GV
GV
GV
3
2
2
2
2
3
2
2
2
3
2
2
2
2
3
2
2
2
2
3
2
2
2
3
I
N1a
IN2a
IN1b
IN2b
2
3
2
2
3
2
2
2
2
3
2
2
2
2
2
3
2
2
3
2
2
2
2
3
I
N1a
IN2a
IN1b
IN2b
Gf
Gf
Gf
Gf
3
2
2
2
2
3
2
2
2
3
2
2
2
2
3
2
2
2
2
3
2
2
2
3
CTLa
CTLb
V
TH
VTH
3
2
2
2
1
2
2
3
2
2
2
1
I
N1a
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
I
N1a
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
C
T
CT
CT
CT
Note 1
Ammeter
Note 2
Note 3
Note 4
Note 5
Note 6
Note 7
Parameter Symbol
Switch settings
Measurement
method
Current dissipation
Maximum
output
level
Voltage
gain
Interchannel
crosstalk
Frequency
characteristic
CTL pin
switching level
Totalharmonic
distortion
Input
impedance
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 (V
P-P).
Note 2: Input a 1V
P-P, 1MHz sine wave. The voltage gain is given by GV = 20 log (VOUT / VIN).
Note 3: Input a 1V
P-P, 4.43MHz sine wave. The interchannel crosstalk is given by CT = 20 log (VOUT / VIN).
Note 4: Input 1V
P-P, 1MHz and 10MHz sine waves. The frequency characteristic is given by Gf = 20 log (VOUT (f =
10MHz) / V
OUT (f = 1MHz)).
Note 5: Input a 1V
P-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 V
OUT level drops below 20mVP-P.
Note 6: Input a 1V
P-P, 1kHz sine wave and measure the total-harmonic distortion of the output using a total-harmonic dis-
tortion meter.
Note 7: Measure the input pin voltage V
IN50 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 = (V
IN50 - VIN0) / 50 × 10
-6
[Ω].
•
Measurement conditions
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Multimedia ICs BA7604N
SIP10
2.8 ± 0.2
25.2
± 0.2
10.5 ± 0.5
0.6
1.3
10
2.54
3.5 ± 0.5
1
5.8
±
0.2
1.2
0.3 ± 0.1
0.8
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External dimensions (Units: mm)
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