GL3812 GL3812 AUDIO/VIDEO SWITCH FOR TV, VCR Functions Pin Configuration • Audio Signal Switching • Video Signal Switching • Input Signal Selecting Logic Features • Possible to Switch 4 Channel Video Signals • Possible to Switch 4 Channel L & R Audio Signals Absolute Maximum Ratings ( T A 1 22 AUDIO-IN, LCH(TV) 2 21 AUDIO-IN, RCH(TV) AUDIO-IN, LCH(V3) 3 20 VCC2 4 19 VIDEO-IN(TV) 5 18 AUDIO-OUT LCH 6 17 AUDIO-OUT RCH AUDIO-IN, RCH(V1) = 25°C ) AUDIO-IN, RCH(V2) AUDIO-IN, RCH(V3) Power Dissipation VCC1 VCC 2 PD Operating Temperature TOPR -20 to +70°C Storage Temperature TSTG -55 to +125°C Supply Voltage AUDIO-IN LCH(V1) AUDIO-IN, LCH(V2) 7 16 VIDEO-OUT 15V 310mW GL3812 VIDEO-IN(V1) VCC 8 15 MODE-OUT TV/LOW VIDEO-IN(V2) 9 14 MODE-OUT, V3/HIGH GND 10 13 MODE-IN(C1) MODE-IN(C0) 11 12 VIDEO-IN(V3) Mode Selection Logic/Output Signal C1 L L H H C0 L H L H PIN 14 L L L H PIN15 L H H H PIN16 VIDEO(TV) VIDEO ( V1 ) VIDEO ( V2 ) VIDEO( V3 ) AUDIO AUDIO AUDIO AUDIO 1 PIN17 RCH(TV) RCH( V1 ) RCH( V2 ) RCH( V3 ) AUDIO AUDIO AUDIO AUDIO PIN18 LCH(TV) LCH( V1 ) LCH( V2 ) LCH( V3 ) 19 1 2 3 22 4 5 6 21 VIDEO-IN, TV AUDIO-IN, V1 AUDIO-IN, V2 AUDIO-IN, V3 AUDIO-IN, TV AUDIO-IN, V1 AUDIO-IN, V2 AUDIO-IN, V3 2 AUDIO-IN, TV BUFFER BUFFER BUFFER GND 10 AUDIO AMP(RCH) AUDIO AMP(LCH) VIDEO AMP 8 20 1 BUFFER BUFFER BUFFER MODE-IN INTERFACE RCH LCH 8 12 VIDEO-IN, V3 7 VIDEO-IN, V2 VIDEO-IN, V1 14 15 17 18 13 11 16 AUDIO-OUT, RCH -OUT, LCH MODE-IN(C1) MODE-IN(CO) VIDEO OUT GL3812 Block Diagram DECODER GL3812 Electrical Characteristics: TA = 25°C, PARAMETER VCC = 12 V SYMBOL CONDITIONS Current Dissipation ICC1,2 VCC1 = VCC2 = 12V Video Channel Bandwidth FV -3dB Frequency Video Signal Voltage Gain AV f=500 kHz, VIN = 1Vp.p f=500 kHz, Video Signal Input Dynamic Range DV Video Channel PSRR PS V Video Channel Input Impedance R IV Video Channel Output Impedance R OV 10 5.0 6.0 1.7 2.0 — Vp.p 15 20 — DB 10 15 — 7.0 THD < 1 % VCC1 = 12V + 1Vp.p MHz dB Sine Wave (50Hz/60Hz) 20 KΩ Ω f=3.58 MHz, VIN = 1Vp.p Vout = 2Vp.p 50 60 — DB FA -3dB frequency 100 — - — KHz Aa f=1 kHz, VIN = 0.5Vp.p 10 12 0.7 1.0 — Vp.p 15 20 — DB 10 15 — 14 DB f=1 kHz Audio Signal Input Dynamic Range Da Audio Channel PSRR PS a Audio Channel Input Impedance R ia Audio Channel Output Impedance R oa THD < 1 % VCC2 = 12 V + 1Vp.p Sine Wave (50Hz/60Hz) — Ω f=1 kHz 60 — DB VOUT = 2Vp.p 60 70 — DB CTa SN a Audio Signal THD THD a f=1 kHz, VOUT = 2Vp.p Input Mode Selection TV or V1 or V2 — 0.5 1.5 % 2.3 2.6 V 0.5 V — 1 mode selection VH , V 3 V3 mode selection VL, TV TV mode selection PIN 15 (TV/L) VH ,TV — 2.0 VMTH PIN 15 (TV/L) KΩ 200 — Audio Channel S/N VL, V3 20 50 Audio Channel Crosstalk High Level Voltage 5 mA DB Audio Signal Voltage Gain Low Level Voltage 20 — Audio Channel Bandwidth High Level Voltage 15 — CTV PIN 14 ( V3 /H) 10 UNIT 50 SN V Low Level Voltage MAX 200 Video Channel S/N PIN 14 ( V3 /H) TYP 40 Video Channel Crosstalk Threshold Voltage MIN V1 or V2 or V3 1 mode selection 3 10 — 10 — — — — 0.5 — V V V GL3812 Pin Description No. 1 2 Name Explanation AUDIO-IN ( L1 ) Input of L-Ch Audio Signal AUDIO-IN ( L 2 ) Input of L-Ch Audio Signal No. Name 13 MODE-IN (C1) 14 MODE-OUT ( V3 /H) for Video ( V1 ). AUDIO-IN ( L 3 ) AUDIO-IN ( R 1 ) Becomes High State, AUDIO-IN ( R 2 ) V3 Only when for Video ( V3 ). Else Low State MODE-OUT (TV/L) is Selected Output Voltage of this Pin Becomes Low State, Only Input of R-Ch Audio Signal when TV is selected. for Video ( V1 ). 5 Output Voltage of this Pin Input of L-Ch Audio Signal 15 4 Input for Mode Selection for Video ( V2 ). 3 Explanation Else High State. Input of R-Ch Audio Signal 16 VIDEO-OUT Output of Selected Video 17 AUDIO-OUT(R) Output of Selected R-CH for Video ( V2 ). Signal 6 AUDIO-IN ( R 3 ) 7 VIDEO-IN ( V1 ) Input of V Video Signal. 18 AUDIO-OUT (L) Output of Selected L-CH 8 VCC1 Power Supply for Video 19 VIDEO-IN (TV) Input of TV Video Signal 9 VIDEO-IN ( V2 ) 20 VCC 2 Power Supply for Audio 21 AUDIO-IN (R-TV) Input of R-Ch Audio Signal for Video ( V3 ). Audio Signal Audio Signal and Logic Block. Input of video Signal. Block 10 GND 11 MODE-IN (C0) 22 12 VIDEO-IN ( V3 ) Input of R-CH Audio Signal for Video (TV). Input for Mode Selection. AUDIO-IN (L-TV) Input of L-CH Audio Signal for Video (TV). Input of V Video Signal. 4 75 35K 75 µF/50V 1µF/50V µF/50V + 35K 1µF/50V + 5 + AUDIO SIGNAL IN LCH µF/50V + 75 + µF/50V + µF/50V + 75 + µF/50V 1 2 5 GL3812 50 7 22 21 20 19 18 17 16 10K×3 8 9 10 + µF/50V 11 15 14 13 12 ×2 5V 1K 1K 10µF/50V + 10µF/50V 10µF/50V µF/50V 50 50 50 GL3812 Test Circuit GL3812 Application Circuit 1M 35K 1M 35K 1M 35K 1M 35K 1M 35K 1M 75 75 * 35K 1ìF 1ìF 1ì 1ìF 1ìF 1ì 1ì 10ìF + + + + + + + + 1 22 2 21 3 20 4 19 5 18 6 GL3812 35K 1M 1ìF + 35K 1M + 10ìF 75 17 7 16 8 15 9 14 10 13 11 12 In case of not using Pin 14 or 15, Connect to Ground. In case of not using Pin 11, Connect to VCC. In case of not using Pin 13, Connect to Ground. 6 1ìF + + 75