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TSH346 Datasheet(PDF) 1 Page - STMicroelectronics |
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TSH346 Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 18 page  December 2008 Rev 2 1/18 18 TSH346 Triple video buffer/filter for HD video applications Features ■ 6th order filtering of 36 MHz ■ 5 V single-supply operation ■ Internal input DC level shifter ■ No input capacitor required ■ Three matched 6 dB amplifiers ■ AC or DC output-coupled ■ Very low harmonic distortion ■ Specified for 150 Ω loads ■ Minimum and maximum data is tested during production Applications ■ High-end video systems ■ High definition TV (HDTV) ■ Broadcast and graphic video ■ Multimedia products Description The TSH346 is a triple single-supply video buffer featuring an internal gain of 6 dB and a 36 MHz filtering for HD video outputs on 75- Ω video lines. The TSH346 is ideal to drive either YUV, YPbPr or RGB signals from video DAC outputs. The main advantage of this circuit is that its input DC level shifter allows for video signals on 75- Ωvideo lines without damaging the synchronization tip of the video signal, and with no input capacitor, while using a single 5 V power supply. The DC level shifter is internally fixed and optimized to keep the output video signals between low and high output rails. This level is as low as possible to minimize the output DC level in the video line. The TSH346 is available in an SO-8 plastic package for optimum space saving. Top View 1 R out 2 3 7 8 G out R in 6 G in +VCC Pin1 identification DC Shifter 6dB 6dB 6dB 36MHz LPF + + + + + + 4 B in 5 B out GND 36MHz LPF 36MHz LPF SO-8 (plastic package) www.st.com |
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