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| GL3812 GL3812 AUDIO/VIDEO SWITCH FOR TV, VCR Functions * Audio Signal Switching * Video Signal Switching * Input Signal Selecting Logic AUDIO-IN LCH(V1) 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 AUDIO-IN, LCH(TV) AUDIO-IN, RCH(TV) VCC2 VIDEO-IN(TV) AUDIO-OUT LCH AUDIO-OUT RCH VIDEO-OUT MODE-OUT TV/LOW MODE-OUT, V3/HIGH MODE-IN(C1) VIDEO-IN(V3) Pin Configuration Features * Possible to Switch 4 Channel Video Signals * Possible to Switch 4 Channel L & R Audio Signals Absolute Maximum Ratings ( T A Supply Voltage Power Dissipation Operating Temperature Storage Temperature AUDIO-IN, LCH(V2) AUDIO-IN, LCH(V3) AUDIO-IN, RCH(V1) AUDIO-IN, RCH(V2) AUDIO-IN, RCH(V3) VIDEO-IN(V1) = 25C ) 15V 310mW -20 to -55 to GL3812 17 16 15 14 13 12 VCC1 VCC 2 PD TOPR TSTG VCC VIDEO-IN(V2) GND MODE-IN(C0) +70C +125C 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 PIN17 RCH(TV) RCH( V1 ) RCH( V2 ) RCH( V3 ) AUDIO AUDIO AUDIO AUDIO PIN18 LCH(TV) LCH( V1 ) LCH( V2 ) LCH( V3 ) 1 Block Diagram 14 15 8 20 VIDEO -IN, V1 8 BUFFER VIDEO AMP BUF FER 16 12 19 11 7 VIDEO OUT VIDEO -IN, V2 VIDEO -IN, V3 VIDEO -IN, TV MOD E-IN(CO) MODEIN INTERFACE DECODER AUDIO -IN, V1 2 BUFFER 3 22 AUDIO AMP(LCH) 1 1 LCH AUDIO -IN, V2 13 MODE -IN(C1) 2 4 5 6 21 BUFFER AUDIO AMP(RCH) 10 GND AUDIO -IN, V3 AUDIO -IN, TV BUFFER 18 -OUT, LCH AUDIO -IN, V1 RCH AUDIO -IN, V2 BUFFER AUDIO -IN, V3 17 AUDIO -OUT, RCH AUDIO -IN, TV GL3812 GL3812 Electrical Characteristics: PARAMETER Current Dissipation Video Channel Bandwidth Video Signal Voltage Gain Video Signal Input Dynamic Range Video Channel PSRR Video Channel Input Impedance Video Channel Output Impedance Video Channel Crosstalk Video Channel S/N Audio Channel Bandwidth Audio Signal Voltage Gain Audio Signal Input Dynamic Range Audio Channel PSRR Audio Channel Input Impedance Audio Channel Output Impedance Audio Channel Crosstalk Audio Channel S/N Audio Signal THD Input Mode Selection Threshold Voltage PIN 14 ( V3 /H) Low Level Voltage PIN 14 ( V3 /H) High Level Voltage PIN 15 (TV/L) Low Level Voltage PIN 15 (TV/L) High Level Voltage VH ,TV VL, TV TV mode selection V1 or V2 or V3 1 mode selection VMTH TV or V1 or V2 1 mode selection V3 mode selection 10 -- -- V Da DV TA = 25C, VCC = 12 V SYMBOL ICC1,2 FV AV CONDITIONS MIN 10 5 5.0 TYP 15 10 6.0 MAX 20 -- 7.0 UNIT mA MHz dB VCC1 = VCC2 = 12V -3dB Frequency f=500 kHz, f=500 kHz, THD < 1 % VCC1 = 12V + 1Vp.p Sine Wave (50Hz/60Hz) VIN = 1Vp.p 1.7 2.0 -- Vp.p PS V R IV R OV CTV SN V FA Aa 15 10 -- 20 15 200 50 60 -- 12 1.0 -- 20 -- -- -- -- 14 -- DB K DB DB KHz DB Vp.p f=3.58 MHz, VIN = 1Vp.p Vout = 2Vp.p -3dB frequency f=1 kHz, VIN = 0.5Vp.p f=1 kHz 40 50 100 10 0.7 THD < 1 % VCC2 = 12 V + 1Vp.p Sine Wave (50Hz/60Hz) 10 -- f=1 kHz VOUT = 2Vp.p f=1 kHz, VOUT = 2Vp.p 50 60 -- 2.0 15 200 60 70 0.5 2.3 20 -- -- -- 1.5 2.6 15 20 -- PS a R ia R oa CTa SN a THD a DB K DB DB % V VL, V3 -- -- 0.5 V VH , V 3 -- -- 0.5 V 10 -- -- V 3 GL3812 Pin Description No. 1 2 3 Name AUDIO-IN ( L1 ) AUDIO-IN ( L 2 ) AUDIO-IN ( L 3 ) Explanation Input of L-Ch Audio Signal for Video ( V1 ). Input of L-Ch Audio Signal for Video ( V2 ). Input of L-Ch Audio Signal for Video ( V3 ). No. 13 14 Name MODE-IN (C1) MODE-OUT ( V3 /H) Explanation Input for Mode Selection Output Voltage of this Pin Becomes High State, Only when V3 is Selected Else Low State 15 MODE-OUT (TV/L) Output Voltage of this Pin Becomes Low State, Only when TV is selected. Else High State. 16 17 18 19 20 21 VIDEO-OUT AUDIO-OUT(R) AUDIO-OUT (L) VIDEO-IN (TV) Output of Selected Video Signal Output of Selected R-CH Audio Signal Output of Selected L-CH Audio Signal Input of TV Video Signal Power Supply for Audio Block Input of R-CH Audio Signal for Video (TV). 22 AUDIO-IN (L-TV) Input of L-CH Audio Signal for Video (TV). 4 AUDIO-IN ( R 1 ) AUDIO-IN ( R 2 ) AUDIO-IN ( R 3 ) VIDEO-IN ( V1 ) Input of R-Ch Audio Signal for Video ( V1 ). 5 6 7 8 9 10 11 Input of R-Ch Audio Signal for Video ( V2 ). Input of R-Ch Audio Signal for Video ( V3 ). Input of V Video Signal. Power Supply for Video and Logic Block. Input of video Signal. VCC1 VIDEO-IN ( V2 ) GND MODE-IN (C0) VCC 2 AUDIO-IN (R-TV) Input for Mode Selection. 12 VIDEO-IN ( V3 ) Input of V Video Signal. 4 Test Circuit 5V F/50V F/50V 10Kx3 1K + + x2 75 1K F/50V 22 21 20 19 18 17 16 10F/50V 15 14 13 12 + F/50V F/50V 75 1F/50V + 50 F/50V F/50V + + AUDIO SIGNAL IN LCH 35K + 75 1F/50V F/50V 35K 75 + GL3812 10F/50V 7 10F/50V 50 + 8 9 10 11 + 1 2 5 50 5 50 GL3812 GL3812 Application Circuit 1M 35K 1iF + 1 22 1iF + 35K 1M 1M 35K 1iF + 2 21 1iF + 35K 1M 1M 35K 1i + 3 20 10iF 75 1M 35K 1iF + 4 19 + 1M 35K 1iF + 5 18 1M 35K 1i + 6 GL3812 17 75 1i + 7 16 8 10iF 15 75 + 9 14 10 13 75 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 |
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