March 2007 Rev 4 1/17
17
TSH343
280MHz single-supply triple video buffer
Features
■ Bandwidth: 280MHz
■ 5V single-supply operation
■ Internal input DC level shifter
■ No input capacitor required
■ 6dB internal gain for a matching between 3
channels
■ Very low harmonic distortion
■ Slew rate: 780V/μs
■ Specified for 150Ω and 100Ω loads
■ Min. and max. data tested during production
Applications
■ High-end video systems
■ High definition TV (HDTV)
■ Broadcast and graphic video
■ Multimedia products
Description
The TSH343 is a triple single-supply video buffer
featuring an internal gain of 6dB and a large
280MHz bandwidth.
The main advantage of this circuit is that its input
DC level shifter allows for video signals on 75Ω
video lines without damage to the synchronization
tip of the video signal, while using a single 5V
power supply with no input capacitor. The DC
level shifter is internally fixed and optimized to
keep the output video signals between low and
high output rails in the best position for the
greatest linearity.
This datasheet provides information on using the
TSH343 as a Y-Pb-Pr driver for video DAC output
on a video line. See the TSH344 datasheet for R-
G-B signals.
The TSH343 is available in the compact SO8
plastic package for optimum space-saving.
Top View
OUT2
1
IN2
OUT1
+Vcc
2
3
7
8
OUT3
IN1
4
6
IN3
GND
SO8
Pin1 identification
5
DC Shifter
6dB
6dB
6dB
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