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| 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. The BA7632AF has larger termination resistors on the inputs than the BA7631 and BA7631F. *Applications recorders Video cassette *Features 1) All the audio-switching functions required for SECAM CANNAL-plus decoder integrated onto one chip. 2) Inputs terminated with 140k 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 = 25C) Parameter Applied voltage Power dissipation Operating temperature Storage temperature Symbol VCC Pd Topr Tstg Limits 13.5 500 - 25 ~ + 70 - 55 ~ + 125 Unit V mV C C Reduced by 5mW for each increase in Ta of 1C over 25C. *Recommended operating conditions (Ta = 25C) Parameter Power supply voltage Symbol VCC Limits 4.5 ~ 13.0 Unit V 1 Multimedia ICs BA7632AF *Block diagram OUT1 1 BF BF 16 OUT2 CTL4 2 1 2 15 CTL5 IN5 3 3 4 SW2 14 CTL3 VCC 4 1 BF 13 OUT3 IN4 5 2 3 12 CTL2 GND2 6 SW1 4 5 11 IN3 IN1 7 1 2 SW3 10 GND1 CTL1 8 9 IN2 BA7632AF Truth *OUT1 table SW1 CTL1 L L H H CTL2 L H L H CTL5 L L L L H SELECT IN1 IN2 IN3 MUTE IN5 *Pin descriptions Pin No. 1 2 3 4 5 6 7 8 CTL5 L L H H SELECT IN1 IN3 IN5 IN3 9 10 11 12 13 14 SELECT IN2 IN4 15 16 Pin Name OUT1 CTL4 IN5 VCC IN4 GND2 IN1 CTL1 IN2 GND1 IN3 CTL2 OUT3 CTL3 CTL5 OUT2 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 Function Don't care OUT2 SW2 CTL3 L H L H OUT3 SW3 CTL4 L H 2 Multimedia ICs BA7632AF *Input / output circuits VCC VCC 1 50 2 8 12 14 15 14k 10k 36k 30k 1.8mA 3, 5, 7, 9, 11 VCC VCC 100 30A 25 1.8mA 13 16 6.0V 140k 125A *Electrical characteristics (unless otherwise noted, Ta = 25C and VCC = 12V) Parameter Recommended operating voltage Supply 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 -- -- -- 1.0 110 Typ. 12.0 14.9 3.6 0 0.005 - 75 20.0 2.0 140 Max. 13.0 24.0 -- 0.5 0.1 - 60 40.0 3.0 165 Unit V mA Vrms dB % dB Vrms 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 -- -- *Ciruit operationmakes it easy to construct a decoder The BA7632AF 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 22F to VTR IN CTL4 for SW3 22F from EXT OUT + + 22F 1 2 3 4 4 1 2 5 SW1 6 3 4 5 1 7 2 8 SW3 9 10 22F + BF 1 2 3 SW2 BF 16 15 14 + to DECODER IN CTL5 for SW2 CTL3 for SW2 to TV IN CTL2 for SW1 VCC 47 + BF 13 12 22F 11 + 22F from VTR OUT + from TV OUT from VTR TUNER OUT CTL1 for SW1 22F + from DECODER OUT Fig.1 VCR TUNER IN OUT 22F + 7 SW1 1 9 2 3 4 5 BF 1 22F + DECODER IN OUT 22F + 22F + 11 8 CTL1 22F + 3 12 CTL2 22F + 5 14 CTL3 TV IN OUT 1 2 3 4 SW2 15 CTL5 22F BF 16 + (AUX) EXT OUT 1 SW3 BF 2 13 22F + 2 CTL4 Fig.2 4 Multimedia ICs BA7632AF *Electrical characteristic curves TOTAL HARMONIC DISTORTION (%) 0.100 MAX OUTPUT LEVEL (Vrms) 5.0 4.0 3.0 0.010 VCC = 12.0 (V) f = 1 (kHz) 2.0 VCC = 12 (V) f = 1 (kHz) THD = 0.5 (%) 1.0 0.001 0 1.0 2.0 3.0 4.0 0 5 10 15 INPUT VOLTAGE (Vrms) POWER SUPPLY VOLTAGE (V) Fig. 3 Distortion characteristics Fig. 4 Power supply voltage vs. dynamic range characteristics *External dimensions (Units: mm) 10.0 0.2 16 6.2 0.3 4.4 0.2 9 1 1.5 0.1 8 0.11 1.27 0.4 0.1 0.3Min. 0.15 SOP16 0.15 0.1 5 |
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