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 •1)Features 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 Limits Unit VCC 13.5 V Pd 1100∗ (DIP) 500∗ (SOP) mV Operating temperature Topr – 25 ~ + 70 °C Storage temperature Tstg – 55 ~ + 125 °C Applied voltage Power dissipation Symbol ∗ 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 Limits Unit VCC 4.5 ~ 13.0 V 1 Multimedia ICs BA7631 / BA7631F •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 3 IN5 SW2 3 4 VCC BF 4 1 2 IN4 5 3 SW1 GND2 6 IN1 7 4 5 1 2 CTL1 8 BA7631 2 SW3 Multimedia ICs BA7631 / BA7631F Truth table •OUT1 SW1 block •Pin descriptions CTL1 CTL2 CTL5 SELECT L L L IN1 L H L IN2 H L L IN3 H H L MUTE ∗ ∗ H IN5 Function 1 OUT1 Output 1 2 CTL4 Control 4 IN5 Input 5 4 VCC Power supply 5 IN4 Input 4 6 GND2 7 IN1 8 CTL1 9 IN2 SELECT 10 GND1 IN3 OUT2 SW2 block CTL5 Pin name 3 ∗ Don't care CTL3 Pin No. GND (GND1 common) Input 1 Control 1 Input 2 GND (GND2 common) L L IN1 11 H L IN3 12 CTL2 Control 2 OUT3 Output 3 Input 3 L H IN5 13 H H IN3 14 CTL3 Control 3 15 CTL5 Control 5 16 OUT2 Output 2 OUT3 SW3 block CTL4 SELECT L IN2 H IN4 3 Multimedia ICs BA7631 / BA7631F •Input / output circuits VCC VCC Q1 N 1 50 2 8 12 14 15 14k 10k 36k 30k 1.8mA 3, 5, 7, 9, 11 VCC VCC 25 30µA 13 16 100 1.8mA 65k 6.0V 4 125µA Multimedia ICs BA7631 / BA7631F •Electrical characteristics (unless otherwise noted, Ta = 25°C and V Parameter CC = 12V) 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 f = 1MHz, THD = 0.5% Voltage gain GV – 0.5 0 0.5 dB f = 1kHz, VIN = 3.0dBm 0.1 % f = 1kHz, VIN = 3.0dBm – 60 dB f = 10kHz, VIN = 3.0dBm µVrms 30kHz LPF, Rg = 2.2kΩ Conditions Total harmonic distortion THD — 0.005 Interchannel crosstalk CTM — – 75 Input conversion noise voltage VMin. — 20.0 CTL switch level VTH 1.0 2.0 3.0 V — Input impedance ZIN 48.5 65 80.5 kΩ — 40.0 䊊Not designed for radiation resistance. operation •TheCircuit 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 BF BF 16 22µF + To DECODER IN 1 CTL4 for SW3 from EXT OUT 2 22µF + VCC 47µ 4 22µF + + BF 1 5 22µF 14 CTL3 for SW2 13 To TV IN SW1 CTL2 for SW1 12 3 4 11 22µF + from TV OUT 5 1 7 2 CTL1 for SW1 SW2 CTL5 for SW2 2 6 from VTR TUNER OUT 3 3 15 4 + from VTR OUT 2 10 SW3 9 8 + 22µF from DECODER OUT Fig.1 5 Multimedia ICs BA7631 / BA7631F VTR TUNER IN OUT 22µF + DECODER IN OUT 22µF + 7 SW1 1 9 2 BF 22µF + 1 3 22µF + 22µF + 22µF + TV 4 11 5 8 3 12 CTL2 5 14 CTL3 15 CTL5 SW2 IN OUT 1 2 3 BF 16 4 (AUX) EXT CTL1 1 SW3 OUT BF 13 22µF + 22µF + 2 2 CTL4 Fig.2 6 Multimedia ICs BA7631 / BA7631F VCC = 12.0 (V) f = 1 (kHz) 5.0 Max. OUTPUT LEVEL (Vrms) TOTAL HARMONIC DISTORTION (%) •Electrical characteristic curves 0.100 0.010 0.001 0 1.0 2.0 3.0 4.0 3.0 2.0 VCC = 12.0 (V) f = 1 (kHz) THD = 0.5 (%) 1.0 4.0 0 INPUT VOLTAGE: (Vrms) 5 10 15 POWER SUPPLY VOLTAGE: (V) Fig. 3 Distortion characteristics Fig. 4 Power supply voltage vs. dynamic range characteristics •External dimensions (Units: mm) BA7631 BA7631F 10.0 ± 0.2 19.4 ± 0.3 9 0.3 ± 0.1 0.5 ± 0.1 0.11 7.62 2.54 9 1 8 1.27 0.4 ± 0.1 0.15 ± 0.1 6.2 ± 0.3 8 16 4.4 ± 0.2 1 1.5 ± 0.1 0.51Min. 3.2 ± 0.2 4.25 ± 0.3 6.5 ± 0.3 16 0.3Min. 0° ~ 15° 0.15 DIP16 SOP16 7