Rohm BA7632 Video switch for canal-plus decoder Datasheet

Multimedia ICs
Video switch for CANAL-Plus decoder
BA7632AF
The BA7632AF is an audio-switching ICs for decoders for scrambled pay channels used in France and other contries. The ICs include a five-input multiplexer, a four-input multiplexer and a two-input multiplexer, and allow decoder
audio switching to be done with a single IC. When used in combination with the BA7630S common logic control can
be used for audio and video switching.
䊊The BA7632AF has larger termination resistors on the inputs than the BA7631 and BA7631F.
Applications
•Video
cassette recorders
•1)Features
All the audio-switching functions required for SECAM
CANNAL-plus decoder integrated onto one chip.
2) Inputs terminated with 140kΩ resistors.
3) Built-in output buffer.
4) Wide supply voltage range (4.5V to 13.0V).
5) Low total harmonic distortion (Max. 0.005% Typ.).
6) Wide dynamic range (3.6Vrms, VCC = 12V).
7) Same control logic as for the BA7630S can be used.
•Absolute maximum ratings (Ta = 25°C)
Parameter
Symbol
Limits
Unit
Applied voltage
VCC
13.5
V
Power dissipation
Pd
500∗
mV
Operating temperature
Topr
– 25 ~ + 70
°C
Storage temperature
Tstg
– 55 ~ + 125
°C
∗ Reduced by 5mW for each increase in Ta of 1°C over 25°C.
•Recommended operating conditions (Ta = 25°C)
Parameter
Power supply voltage
Symbol
Limits
Unit
VCC
4.5 ~ 13.0
V
1
Multimedia ICs
BA7632AF
•Block diagram
OUT1
1
CTL4
2
BF
BF
1
16
OUT2
15
CTL5
14
CTL3
13
OUT3
12
CTL2
11
IN3
10
GND1
9
IN2
2
IN5
3
3
SW2
4
VCC
4
IN4
5
GND2
6
BF
1
2
3
SW1
4
5
IN1
1
7
SW3
2
CTL1
8
BA7632AF
Truth table
•OUT1
SW1
•Pin descriptions
Pin No.
Pin Name
CTL1
CTL2
CTL5
SELECT
1
OUT1
Output 1
L
L
L
IN1
2
CTL4
Control 4
L
H
L
IN2
3
IN5
Input 5
H
L
L
IN3
4
VCC
Power supply
H
H
L
MUTE
5
IN4
∗
∗
Input 4
H
IN5
6
GND2
∗ Don't care
7
IN1
OUT2 SW2
8
CTL1
Function
GND (GND1 common)
Input 1
Control 1
CTL3
CTL5
SELECT
9
IN2
L
L
IN1
10
GND1
H
L
IN3
11
IN3
L
H
IN5
12
CTL2
Control 2
H
H
IN3
13
OUT3
Output 3
OUT3 SW3
14
CTL3
Control 3
CTL4
SELECT
15
CTL5
Control 5
L
IN2
16
OUT2
Output 2
H
IN4
2
Input 2
GND (GND2 common)
Input 3
Multimedia ICs
BA7632AF
•Input / output circuits
VCC
VCC
2
8
12
14
15
1
50
14k
10k
36k
1.8mA
30k
3, 5, 7, 9, 11
VCC
VCC
30µA
100
25
13
16
140k
1.8mA
6.0V
•Electrical characteristics (unless otherwise noted, Ta = 25°C and V
Parameter
Recommended operating voltage
CC
125µA
= 12V)
Symbol
Min.
Typ.
Max.
Unit
Conditions
VCC
4.5
12.0
13.0
V
—
Supply current
ICC
—
14.9
24.0
mA
Maximum output level
Vom
3.1
3.6
—
Vrms
f = 1MHz, THD = 0.5%
GV
– 0.5
—
0
0.5
dB
f = 1kHz, VIN = 3.0dBm
THD
—
0.005
0.1
%
f = 1kHz, VIN = 3.0dBm
Interchannel crosstalk
CTM
—
– 75
– 60
dB
f = 10kHz, VIN = 3.0dBm
Input conversion noise voltage
VMin.
—
20.0
40.0
µ Vrms
30kHz LPF, Rg = 2.2kΩ
CTL switch level
VTH
1.0
2.0
3.0
V
—
Input impedance
ZIN
110
140
165
kΩ
—
Voltage gain
Total harmonic distortion
䊊Not designed for radiation resistance.
operation
•TheCiruitBA7632AF
makes it easy to construct a decoder
for the scrambled pay channels. They have been
designed specifically for audio signal decoding. As
shown in the application examples in Figs. 1 and 2,
there are inputs for TV, VCR, decoder, and AUX, to
cover a wide range of applications. When the AUX
input is not used, by setting CTL5 to “L”, the system
construction becomes the same as that of the
BA7630S, and the BA7630S switching logic can be
used as is.
3
Multimedia ICs
BA7632AF
•Application examples
22µF
+
to VTR IN
22µF
1
BF
BF
16
+
to DECODER IN
1
2
CTL4 for SW3
2
22µF
from EXT OUT
+
VCC
47µ
3
3
15
CTL5 for SW2
14
CTL3 for SW2
13
to TV IN
4
+
4
1
22µF
+
from VTR OUT
5
12
3
11
+
from TV OUT
5
1
7
10
2
22µF
SW3
9
8
CTL1 for SW1
CTL2 for SW1
22µF
4
6
22µF +
BF
2
SW1
from VTR
TUNER OUT
SW2
from
DECODER OUT
+
Fig.1
VCR
TUNER
IN
OUT
22µF
+
DECODER
IN
OUT
7
SW1
1
22µF
+
9
2
11
3
4
5
22µF
+
22µF
BF
+
1
8
CTL1
3
12
CTL2
5
14
CTL3
15
CTL5
22µF
+
22µF
+
TV
1
IN
OUT
SW2
2
3
22µF
BF
16
BF
13
+
4
(AUX)
EXT
22µF
1 SW3
OUT
+
2
2
Fig.2
4
CTL4
Multimedia ICs
BA7632AF
MAX OUTPUT LEVEL (Vrms)
TOTAL HARMONIC DISTORTION (%)
•Electrical characteristic curves
0.100
0.010
VCC = 12.0 (V)
f = 1 (kHz)
0.001
0
1.0
2.0
3.0
4.0
5.0
4.0
3.0
2.0
0
INPUT VOLTAGE (Vrms)
VCC = 12 (V)
f = 1 (kHz)
THD = 0.5 (%)
1.0
5
10
15
POWER SUPPLY VOLTAGE (V)
Fig. 3 Distortion characteristics
Fig. 4 Power supply voltage vs.
dynamic range characteristics
•External dimensions (Units: mm)
1
8
4.4 ± 0.2
9
1.27
0.4 ± 0.1
0.15 ± 0.1
1.5 ± 0.1
0.11
6.2 ± 0.3
10.0 ± 0.2
16
0.3Min.
0.15
SOP16
5
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