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Part: BA7631
Category:
Multimedia
Description:
Company: ROHM Electronics
Datasheet: Download BA7631 datasheet File size : 124 kB
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Datasheet text preview:
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. pp cations ·iAeolicassette recorders Vd ur s ·)FAelattheeaudio-switching functions required for SECAM 1l CANAL -plus decoder integrated onto one chip. 2) Inputs terminated with 65k 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 Applied voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 13.5 1100 (DIP) 500 (SOP) 25 ~ + 70 55 ~ + 125 Unit V mV °C °C
Reduced by 11mW (DIP) or 5mW (SOP) for each increase in Ta of 1°C over 25°C.
·Recommended operating conditions (Ta = 25°C)
Parameter Power supply voltage Symbol VCC Limits 4.5 ~ 13.0 Unit V
1
Multimedia ICs
BA7631 / BA7631F
·Block diagram
OUT1 1 BF BF 16 OUT2
CTL4
2
1 2 3
15
CTL5
IN5
3 4
SW2
14
CTL3
VCC
4 1 2
BF
13
OUT3
IN4
5 3 SW1 4 5
12
CTL2
GND2
6
11
IN3
IN1
7
1 2 SW3
10
GND1
CTL1
8
9
IN2
BA7631
2
Multimedia ICs
table ·TrTu1th SW1 block OU
CTL1 L L H H CTL2 L H L H CTL5 L L L L H SELECT IN1 IN2 IN3 MUTE IN5
BA7631 / BA7631F
·Pin descriptions
Pin No. 1 2 3 4 5 6 7 8 Pin name OUT1 CTL4 IN5 VCC IN4 GND2 IN1 CTL1 IN2 GND1 IN3 CTL2 OUT3 CTL3 CTL5 OUT2 Function Output 1 Control 4 Input 5 Power supply Input 4 GND (GND1 common) Input 1 Control 1 Input 2 GND (GND2 common) Input 3 Control 2 Output 3 Control 3 Control 5 Output 2
Don't care
OUT2 SW2 block
CTL3 L H L H CTL5 L L H H SELECT IN1 IN3 IN5 IN3
9 10 11 12 13 14 15 16
OUT3 SW3 block
CTL4 L H SELECT IN2 IN4
3
Multimedia ICs
BA7631 / BA7631F
·Input / output circuits
VCC Q1 N
VCC
1
50
2 8 12 14 15
14k 10k 36k 30k
1.8mA
3, 5, 7, 9, 11
VCC
VCC 25 1.8mA 6.0V
13 16
65k 125µA
30µA 100
4
Multimedia ICs
BA7631 / BA7631F
·Electrical characteristics (unless otherwise noted, Ta = 25°C and VCC = 12V)
Parameter Recommended operating voltage Circuit current Maximum output level Voltage gain Total harmonic distortion Interchannel crosstalk Input conversion noise voltage CTL switch level Input impedance
Not designed for radiation resistance.
Symbol VCC ICC Vom GV THD CTM VMin. VTH ZIN
Min. 4.5 -- 3.1 0.5 -- -- -- 1.0 48.5
Typ. 12.0 14.9 3.6 0 0.005 75 20.0 2.0 65
Max. 13.0 24.0 -- 0.5 0.1 60 40.0 3.0 80.5
Unit V mA Vrms dB % dB µVrms V k
Conditions -- -- f = 1MHz, THD = 0.5% f = 1kHz, VIN = 3.0dBm f = 1kHz, VIN = 3.0dBm f = 10kHz, VIN = 3.0dBm 30kHz LPF, Rg = 2.2k -- --
cuit operation ·hCeirBA7631 and BA7631F make it easy to construct a decoder for the scrambled pay channels. They have been T 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 CTL4 for SW3 from EXT OUT
22µF +
1 2 3 4 5 6
BF 1
BF
16 15
22µF +
To DECODER IN CTL5 for SW2 CTL3 for SW2 To TV IN CTL2 for SW1 from TV OUT
22µF + VCC 47µ
2 3 4 1 2 3 SW1 4 5 1 2 SW3 BF SW2
14 13 12 11 10 9 + 22µF
+
from VTR OUT
22µF +
22µF +
22µF
from VTR TUNER OUT CTL1 for SW1
+
7 8
from DECODER OUT
Fig.1
5
Others parts begin by ba
BA-1 BA-2 BA-3 BA-4 BA-5 BA-6 BA-7 BA-8 BA-9 BA-10 BA-11 BA-12 BA-13 BA-14 BA-15 BA-16 BA-17 BA-18
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