BH7634AS Rohm, BH7634AS Datasheet
BH7634AS
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BH7634AS Summary of contents
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... Multimedia ICs Audio / video switch for CANAL - Plus decoder BH7634AS The BH7634AS is one-chip IC that contains audio and video switches that support 21-pin SECAM and PAL connec- tors. 2 The I C BUS for switch control simplifies applications, while the two expansion ports allow up to two external inputs. ...
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... AUXCTL1 ATUNIN 11 AUXCTRL2 12 AUXCTL2 2 A VSW1 B A VSW2 VSW3 6.0V A REG ASW1 ASW2 ASW3 C AUXCTL1 FOR SW AUXCTL2 BH7634AS 24 CLAMP 6dB 23 DRIVER 22 BUFFER 21 BUFFER 6dB 20 DRIVER 19 18 BUFFER 17 BUFFER 16 BUFFER BUS MUTE CONTROL 13 VVTRIN VEXTOUT VVTROUT VVPSOUT VDECOUT V CC AVTRIN AEXTOUT AVTROUT ...
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... Audio output. 17 AEXTOUT Audio output. 18 AVTRIN Audio input Power supply VDECOUT Composite video signal output. 21 VVPSOUT Composite video signal output. 22 VVTROUT Composite video signal output. 23 VEXTOUT Composite video signal output. 24 VVTRIN Composite video signal input (sink chip clamp). BH7634AS Function (pin 19 BUS. 3 ...
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... V are not connected internally. Audio signal input 50 A For audio signal input. Input impedance is 50k. 1k 50k 12V FS control 6V Three voltages are output 2 via I 5.9V, 0.2V. 50k BH7634AS Pin description is the driver CC is the CC and DRVV BUS control: 11.8V, ...
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... For clock input compliant with the I 1k Audio signal output Outputs the audio signal. ADECOUT and AEXTOUT are respectively for decoder output and external output. Audio signal output Outputs the audio signal. AVRTOUT outputs to the signal processor. 500 A BH7634AS Pin description 2 C BUS BUS. 5 ...
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... equivalent circuits Video signal output Outputs the composite video signal. VDECOUT and VEXTOUT are respectively for decoder output and external output. Video signal output Outputs the composite video signal. VVPSOUT is output for VPS, VVTSOUT outputs to the signal processor. 1mA BH7634AS Pin description ...
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... OF V 3.0 — — — 1.5 L Symbol Min. Typ. Max. CT — – 70 – — – 45 – — – 50 – — – 90 – — – 90 – 70 MTA BH7634AS Unit Conditions mA No signal 10k 10k 10k FSCO 10k 10k 4.43MHz P 100k / 7MHz IN P-P ...
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... LOW 8 Symbol Min. Max 100 SCL t 4.7 — BUF t 4.0 — HD: STA t 4.7 — LOW t 4.0 — HIGH t 4.7 — SU: STA t 250 — SU: DAT t — 1000 R t — 300 F t 4.0 — SU: STO HIGH SU: DAT SU: STA BH7634AS Unit Conditions kHz SU: STO P ...
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... LSB SW2 D8 FSCOUT control External control 2 D0 Note: When D2 is HIGH, only the audio switches are muted MSB 2nd byte SELECT FSC OUT H H LOW H L MIDDLE L H HIGH L L HIGH AUX CTL2 OUT H HIGH L LOW BH7634AS LSB 0 9 ...
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... DRVV SW1 SW3 SG1 SG2 10 SG8 SW18 VCC A SW19 V DRVV 6dB VSW3 ASW1 6.0V REG CLAMP SW5 1 2 SW7 SG3 SG6 Fig. 1 BH7634AS MUTE BUS CONTROL AUXCTL1 FOR SW ASW2 ASW3 CURRENT LIMITER AUXCTL1 SW8 SW9 SW11 SG6 SG7 BUS SG 13 ...
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... Multimedia ICs • Application example CLAMP 6dB VSW1 VSW2 CLAMP CLAMP 6dB VSW3 ASW1 6.0V REG CLAMP Fig. 2 BH7634AS MICROCONTROLLERS MUTE BUS CONTROL AUXCTL1 FOR SW ASW2 ASW3 CURRENT LIMITER AUXCTL1 AUXCTL2 AUXCTL2 12 11 ...
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... Fig. 6 Audio output (pin 16) frequency characteristics • External dimensions (Units: mm) 22.9 0 1.778 0.5 0.1 SDIP24 – 25 100k 1M 10M 100M (Hz) FREQUENCY: f Fig. 4 Video output (pins 21, 22) frequency characteristics 10M 7. BH7634AS 25 0 – 25 100M 1k 10k 100k 1M (Hz) FREQUENCY: f Fig. 5 Audio output (pins 15, 17) frequency characteristics 10M ...