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BA7604N-E
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 (20k
W
• Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Power supply voltage
Power dissipation
Operating temperature
Storage temperature
*
V CC
9
V
mW
° C
° C
Pd
500 *
Topr
– 40 ~ + 85
– 55 ~ + 125
Tstg
Reduced by 5.0mW for each increase in Ta of 1
°
C over 25
°
C.
• Block diagram
S a
S b
1234567 890
CTL Output
L
IN2
S a , S b : Non-clamped
H
IN1
1
Typ.).
7) Fast switching speed (50ns Typ.).
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Multimedia ICs
BA7604N
• Equivalent circuits
Sa, Sb
IN
V CC
R3
13.6k
R4
200
I2
0.3mA
R12
200
R16
200
Q5
R7
100
R2
2.2k
Q9
Q4
R6
20k
R9
200
R15
200
Q7 Q8
Q10 Q11
Q3
R10
100
R11
100
R13
100
R14
100
Q2
Q12
Q1
OUT
R1
1k
R5
33k
I1
0.6mA
R17
12k
I4
0.6mA
I5
1mA
CTL
V CC
R1
50k
R6
25k
R2
200
I2
0.6mA
Q1
Q6
CTL
Q3
Q5
Q2 Q4
R5
25k
I1
0.25mA
R3
400
R4
400
I3
0.06mA
2
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Multimedia ICs
BA7604N
• Electrical characteristics (unless otherwise noted, Ta = 25°C and V CC = 5.0V)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Operating voltage
Supply current
Maximum output level
Voltage gain
Interchannel crosstalk
Frequency characteristic
Total-harmonic distortion
CTL pin switch level
Input impedance
V CC
4.5
5.0
5.5
V
—
I CC
—
8.4
13.0
mA
—
V om
2.7
3.0
—
V P-P
f = 1kHz, THD = 0.5%
G V
– 0.5
0
0.5
dB
f = 1MHz, V IN = 1V P-P
f = 4.43MHz, V IN = 1V P-P
C T
—
– 65
—
dB
G f
– 3
0
1
dB
10MHz / 1MHz, V IN = 1V P-P
THD
—
0.007
—
%
f = 1MHz, V IN = 1V P-P
V TH
2.0
2.5
3.0
V
—
Z IN
14
20
26
k W
—
Note: 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
2.48
6
1.76
2
5.00
7
4.91
3
2.48
8
2.48
4
4.91
9
0
5
1.76
10
2.48
Electrical characteristics
Parameter
Min.
Typ. Max.
Unit
Input impedance (no clamp)
Output impedance
The input coupling capacitor values should be 0.1
—
20k
—
W
—30
—
W
m
F to 1
m
F.
3
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Multimedia ICs
BA7604N
• Measurement circuit
1
2
3
4
5
6
7
8
9
10
V CC
A1
V
V
S 1a
S 2a
S 3a
S 3b
S 2b
S 1b
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
V IN1a
V IN2a
V IN2b
V IN1b
OSC
OSC
V CC
V CC
OSC
OSC
R
R
R
R
R = 75
W
4
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Multimedia ICs
BA7604N
• Measurement conditions
Switch settings
Measurement
method
Parameter
Symbol
S 1a
S 2a
S 3a
S 1b
S 2b
S 3b
Current dissipation
I CC
2
2
2
2
2
2
Ammeter
Maximum
output
level
I N1a
I N2a
I N1b
I N2b
V om
V om
V om
V om
3
2
2
2
2
3
2
2
2
3
2
2
2
2
3
2
2
2
2
3
2
2
2
3
Note 1
Voltage
gain
I N1a
I N2a
I N1b
I N2b
G V
G V
G V
G V
3
2
2
2
2
3
2
2
2
3
2
2
2
2
3
2
2
2
2
3
2
2
2
3
Note 2
Interchannel
crosstalk
I N1a
I N2a
I N1b
I N2b
C T
C T
C T
C T
2
3
2
2
3
2
2
2
2
3
2
2
2
2
2
3
2
2
3
2
2
2
2
3
Note 3
Frequency
character-
istic
CTL pin
switching level
I N1a
I N2a
I N1b
I N2b
G f
G f
G f
G f
3
2
2
2
2
3
2
2
2
3
2
2
2
2
3
2
2
2
2
3
2
2
2
3
Note 4
CTLa
CTLb
V TH
V TH
3
2
2
2
1
2
2
3
2
2
2
1
Note 5
Total-
harmonic
distortion
I N1a
I N2a
I N1b
I N2b
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
Note 6
Input
impedance
I N1a
I N2a
I N1b
I N2b
Z IN
Z IN
Z IN
Z IN
1
2
2
2
2
1
2
2
2
3
2
2
2
2
1
2
2
2
2
1
2
2
2
3
Note 7
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 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 = 1MHz)).
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 .
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 DC50
m
´
10 -6 [
W
].
5
A is flowing into the input pin. Measure the input
pin open-circuit voltage. The input impedance is given by Z = (V IN50 - V IN0 ) / 50
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