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