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THS7374IPWR Datasheet(PDF) 24 Page - Texas Instruments |
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THS7374IPWR Datasheet(HTML) 24 Page - Texas Instruments |
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24 / 37 page  Low-Cost SCART System TVCVBS/ SyncOut 75 W R' R G' R1 B' R1 CVBS/Sync R1 1 2 3 4 5 6 7 14 13 12 11 10 9 8 CH1OUT CH2OUT CH3OUT CH4OUT V S+ BYPASS NC CH1IN CH2IN CH3IN CH4IN GND DISABLE NC THS7374 ToGPIOController orGND Left R2 TVR'Out 75 W TVG'Out 75 W TVB'Out 75 W +3Vto+5V Right SOC PCM17xx R2 Amp LPFBias Amp LPFBias NE5532 DRV600 DRV601 A B C INH VEE VSS +12V +12V 100 W +V BIAS 47 F m 100 W 47 F m 100kW 100kW + 330 F m (1) VCRCVBS/ SyncOut 75 W + 330 F m (1) + 330 F m (1) + 330 F m (1) + 330 F m (1) 20 18 16 14 12 10 8 6 4 2 19 17 15 13 11 9 7 5 3 1 AudioLeftOut 470 W 47 F m AudioRightOut 470 W 47 F m AudioLeftOut 470 W 47 F m 0.1 F m AudioRightOut 470 W 47 F m NC NC NC NC NC NC NC NC 75 W 1kW 470 W 1kW FastBlank RGB/CVBS (FromGPIO) TVSCART 10kW 1.5kW 1.5kW STBY/TV (FromGPIO) 16:9/4:3 (FromGPIO) 21 20 18 16 14 12 10 8 6 4 2 19 17 15 13 11 9 7 5 3 1 NC NC NC 220 W VCRSCART 75 W VCRCVBSIn VCRMode 22kW 22kW 22kW 21 CD4053 THS7374 SLOS590 – JULY 2008....................................................................................................................................................................................................... www.ti.com of this switch is acceptable in this configuration, because the input impedance of the THS7374 is 800 The THS7374 is an ideal device for use in low-cost k Ω and the audio signal impedance requirement is SCART systems. SCART is used primarily throughout less than 1 k Ω. Obviously, other switches and Europe and requires four video channels to support methods could be used, but this alternative is very the RGB and timing channel. The timing channel is low cost compared to fairly expensive SCART also utilized for CVBS signals for systems that do not switching ICs. It does not support all possible modes have separate RGB video signals. The connector and configurations, but it is a good fit to meet many also adds audio and several other functions. system requirements. Figure 42 shows a low-cost application that allows for a commonly-used SCART switching interface with a simple CD4053 switch. The relatively high impedance (1) These capacitors are optional. Figure 42. Low-Cost SCART Switching System Circuit 24 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Link(s): THS7374 |
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