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PDF BA7631F Data sheet ( Hoja de datos )
| Número de pieza | BA7631F | |
| Descripción | Video switch for CANAL-Plus decoder | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Multimedia ICs
Video switch for CANAL-Plus decoder
BA7631 / BA7631F
The BA7631 and BA7631F are audio-switching ICs for decoders for scrambled pay channels used in France and
other countries. 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.
•Applications
Video cassette recorders
•Features
1) All the audio-switching functions required for SECAM
CANAL -plus decoder integrated onto one chip.
2) Inputs terminated with 65kΩ resistors.
3) Built-in output buffer.
4) Wide supply voltage range (4.5V to 13.0V).
5) Low total harmonic distortion (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
Parameter
Symbol
Limits
Applied voltage
Power dissipation
Operating temperature
VCC
Pd
Topr
13.5
1100∗ (DIP)
500∗ (SOP)
– 25 ~ + 70
Storage temperature
Tstg – 55 ~ + 125
∗ Reduced by 11mW (DIP) or 5mW (SOP) for each increase in Ta of 1°C over 25°C.
Unit
V
mV
°C
°C
•Recommended operating conditions (Ta = 25°C)
Parameter
Symbol
Limits
Power supply voltage
VCC
4.5 ~ 13.0
Unit
V
1
1 page  
Multimedia ICs
BA7631 / BA7631F
•Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 12V)
Parameter
Symbol Min. Typ. Max. Unit
Recommended operating voltage
VCC
4.5 12.0 13.0
V
Circuit current
ICC
—
14.9 24.0
mA
Maximum output level
Vom
3.1 3.6
— Vrms
Voltage gain
GV – 0.5 0 0.5 dB
Total harmonic distortion
THD
— 0.005 0.1
%
Interchannel crosstalk
Input conversion noise voltage
CTM
VMin.
— – 75 – 60
dB
—
20.0
40.0
µVrms
CTL switch level
VTH 1.0 2.0 3.0 V
Input impedance
ZIN 48.5 65 80.5 kΩ
᭺Not designed for radiation resistance.
Conditions
—
—
f = 1MHz, THD = 0.5%
f = 1kHz, VIN = 3.0dBm
f = 1kHz, VIN = 3.0dBm
f = 10kHz, VIN = 3.0dBm
30kHz LPF, Rg = 2.2kΩ
—
—
•Circuit operation
The BA7631 and BA7631F make 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.
•Application example
To VTR IN
22µF
+
1
CTL4 for SW3
22µF
+
from EXT OUT
VCC
47µ+
from VTR OUT
22µF
+
2
3
4
5
from VTR
TUNER OUT
CTL1 for SW1
22µF
+
6
7
8
BF
SW1
BF
1
2
3 SW2
4
1 BF
2
3
4
5
1
2 SW3
22µF
+
16
To DECODER IN
15 CTL5 for SW2
14 CTL3 for SW2
13 To TV IN
12
22µF
+
11
CTL2 for SW1
from TV OUT
10
9
+
22µF
from
DECODER OUT
Fig.1
5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet BA7631F.PDF ] | |
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