ROHM BA7649A

Multimedia ICs
Video signal switcher
BA7649A / BA7649AF
The BA7649A and BA7649AF are five-channel analog multiplexers (the IN5 pin can be used a mute input) designed
for use in video cassette recorders. They feature large dynamic range, and wide operating frequency range, and
have sync-tip inputs which are ideal for switching video signals.
Applications
•Video
cassette recorders and televisions
•1)Features
5-input / 1-output switches.
6) Excellent frequency characteristics
(10MHz, 0dB Typ.).
7) Wide dynamic range (3.5VP-P Typ.).
8) Low interchannel crosstalk
( – 65dB Typ., f = 4.43MHz).
9) DIP / SOP 14 pin package.
2) Built-in mute (the IN5 pin can be use a mute input).
3) Sync-tip clamp inputs.
4) Wide operating supply voltage range
(4.5V to 13.0V).
5) Low power consumption (48mW Typ.).
Absolute maximum ratings (Ta = 25°C)
•BA7649A
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
13.5
V
Allowable current
Pd
1100∗
mW
Operating temperature
Topr
– 25 ~ + 75
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
∗ Reduced by 11.0mW for each increase in Ta of 1°C over 25°C.
BA7649AF
Parameter
Power supply voltage
Symbol
Limits
Unit
VCC
13.5
V
mW
Pd
450∗
Operating temperature
Topr
– 25 ~ + 75
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
Allowable current
∗ Reduced by 4.5mW for each increase in Ta of 1°C over 25°C when mounted on a 50mm × 50mm PCB board.
1
Multimedia ICs
BA7649A / BA7649AF
•Truth table
L (OPEN)
IN2
L (OPEN)
L (OPEN)
IN3
H
H
L (OPEN)
IN4
H
MUTE (IN5)
IN3
H
H
GND
IN1
IN4
OUT
VCC
CTLC
L (OPEN)
IN5
CTLB
L (OPEN)
GND
CTLA
VOUT
•Block diagram
L (OPEN)
14
13
12
11
10
9
8
L (OPEN)
∗
∗
∗ Either "L (open)" or "H".
3
4
5
GND
CTL A
CTL B
CTL C
6
7
GND
2
IN2
1
IN1
Logic
•Equivalent circuits
CLAMP INPUT
IN
Input clamp voltage 2.1V (VCC = 5V, Typ.)
Input bias current 1µA [Typ.]
Input impedance over 1MΩ
D1
OUTPUT
D2
Vcc
Vcc
Q1 R2
Q1
100
D1
Q2
0.8µA
OUT
Output impedance 20Ω [Typ.]
Output DC voltage 0.55V (VCC = 5V, Typ.)
100µA
2mA
D2
CTLA / CTLB
CTLC
Vcc
Vcc
R4
R1
R2
100
50k
CTLA / B
Q3
R3
D2
2
R4
20k
R1
R2
100
45k
CTLC
30k
Q3
R3
34k
D2
29k
Multimedia ICs
BA7649A / BA7649AF
•Electrical characteristics (unless otherwise noted, Ta = 25°C and V
Parameter
CC
= 5V)
Symbol
Min.
Typ.
Max.
Unit
Conditions
VCC
4.5
—
13.0
V
—
Operating voltage
Supply current
ICC
—
9.5
14.5
mA
Maximum output level
Vom
3.0
3.5
—
VP-P
f = 1kHz, THD = 0.5%
Voltage gain
GV
– 0.5
0
0.5
dB
f = 1MHz, VIN = 1.0VP-P
Interchannel crosstalk
CT
—
—
dB
f = 4.43MHz,
VIN = 1.0VP-P
Frequency characteristics
Gf
– 3.0
0
1.0
dB
f = 10MHz / 1MHz,
VIN = 1.0VP-P
CTL pin switching level A
VTH-A
1.0
2.0
3.0
V
—
CTL pin switching level B
VTH-B
1.0
2.0
3.0
V
—
CTL pin switching level C
VTH-C
1.0
2.0
3.0
V
—
– 65
—
䊊Not designed for radiation resistance.
•Measurement circuit
1µF
~
50Ω
1µF
~
50Ω
OSC
1µF
OSC
1µF
1
2
1µF
~
50Ω
OSC
1
2
SW5
1µF
2
SW4
1
SW3
VCC
A
+
V
47µF
14
13
12
11
10
9
8
5
6
7
0.022µF
Logic
1
2
3
4
SW1
1
SW2
1
2
1µF
2
1µF
OSC
OSC
~
50Ω
~
1µF
SW6
1
2 3
VCC
SW7
1
2 3
VCC
50Ω
1µF
SW8
1
2 3
VCC
Fig. 1
3
Multimedia ICs
BA7649A / BA7649AF
•Measurement conditions
Switch settings
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
Measurement
method
ICC
2
2
2
2
2
3
3
3
Ammeter
IN 1
IN 2
IN 3
IN 4
IN 5
Vom
Vom
Vom
Vom
Vom
1
2
2
2
2
2
1
2
2
2
2
2
1
2
2
2
2
2
1
2
2
2
2
2
1
3
3
2
2
∗
3
2
3
2
∗
3
3
3
3
2
f = 1kHz,
THD = 0.5%
Note 1
IN 1
IN 2
IN 3
IN 4
IN 5
GV
GV
GV
GV
GV
1
2
2
2
2
2
1
2
2
2
2
2
1
2
2
2
2
2
1
2
2
2
2
2
1
3
3
2
2
∗
3
2
3
2
∗
3
3
3
3
2
f = 1MHz,
VIN = 1VP-P
Note 2
IN1→1N2
IN1→1N3
IN1→1N4
IN1→1N5
IN2→1N3
IN2→1N4
IN2→1N5
IN3→1N4
IN3→1N5
IN4→1N5
CT
CT
CT
CT
CT
CT
CT
CT
CT
CT
1
1
1
1
2
2
2
2
2
2
2
2
2
2
1
1
1
2
2
2
2
2
2
2
2
2
2
1
1
2
2
2
2
2
2
2
2
2
2
1
2
2
2
2
2
2
2
2
2
2
3
2
2
2
3
2
3
3
3
2
3
3
2
3
2
2
f = 4.43MHz,
VIN = 1VP-P
Note 3
Frequency
characteristic
IN 1
IN 2
IN 3
IN 4
IN 5
Gf
Gf
Gf
Gf
Gf
1
2
2
2
2
2
1
2
2
2
2
2
1
2
2
2
2
2
1
2
2
2
2
2
1
CTL pin
switching level
CTLA
CTLB
CTLC
VTH
VTH
VTH
2
2
2
2
1
2
1
2
2
2
2
2
2
2
1
Parameter
Symbol
Current dissipation
Maximum
output level
Voltage gain
Interchannel
crosstalk
∗
∗
∗
∗
∗
∗
∗
∗
3
3
2
2
∗
3
2
3
2
∗
3
3
3
3
2
f = 10MHz,
f = 1MHz,
VIN = 1VP-P
Note 4
1
3
3
1
3
3
1
Note 5
2
2
3
2
2
2
∗
∗
∗ Anywhere is possible.
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 = 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.
•Electrical characteristic curves
20
10
4
VCC = 12V
7
VCC = 9V
6
5
4
VCC = 5V
3
2
0
–2
2
0
0
– 20
– 40
– 60
–4
1
1
2
3
4
5
6
7
8
9
INPUT VOLTAGE: VIN (VP-P)
Fig. 2 VIN vs. VOUT (f = 1kHz)
4
0
CROSSTALK: CT (dB)
8
VOLTAGE GAIN: Cf (dB)
OUTPUT VOLTAGE: VOUT (VP-P)
9
10
100k
300k
1M
3M
10M
30M
100M
FREQUENCY: f (Hz)
Fig. 3 Frequency characteristics
– 80
100k
300k
1M
3M
10M
30M
FREQUENCY: f (Hz)
Fig. 4 Interchannel crosstalk
100M
Multimedia ICs
BA7649A / BA7649AF
•External dimensions (Units: mm)
BA7469A
BA7649AF
19.4 ± 0.3
0.3 ± 0.1
2.54
14
8
1
7
1.27
0.15 ± 0.1
4.4 ± 0.2
6.2 ± 0.3
1.5 ± 0.1
7.62
0.11
7
0.51Min.
4.25 ± 0.3
1
3.2 ± 0.2
8.7 ± 0.2
8
6.5 ± 0.3
14
0.4 ± 0.1
0.3Min.
0.5 ± 0.1 0° ~ 15°
0.15
DIP14
SOP14
5