TSH173 Datasheet, PDF (1/13 Pages) STMicroelectronics – Triple video buffer with filter for SD video

TSH173
Triple video buffer with filter for SD video
Features
■ 4.5V to 5.5V single supply operation
■ R-G-B, Y-Pb-Pr, Y-C-CVBS driving
■ 3 channels with 6dB gain buffer
■ 3 video reconstruction filters for SD
■ 3 internal input DC level shifter
■ No input capacitor is required
■ Very low harmonic distortion
■ Each output can drive AC- or DC-coupled
150Ω loads
■ Tested on 5V power supply
■ Data min. and max. are tested during
production
Applications
■ Set top boxes
■ DVD players/recorders
■ High-end video systems
■ Standard definition TV (SD)
■ Multimedia products
Description
The TSH173 is a single supply triple video buffer
featuring an internal gain of 6dB and an internal
low pass filter of 8.2MHz cut-off frequency for
each channel to fit with Standard Definition
requirements for video line interfaces.
Another advantage of the TSH173 is its input DC
level shifter to drive the video signal on a 75Ω
video line without any damage to the
synchronization tip, 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 signal between low and high output
rails in the best position to improve linearity.
Pin connections (top view)
IN1 1
8.2MHz
5^th order
6dB
IN2 2
8.2MHz
5^th order
6dB
IN3 3
8.2MHz
5^th order
6dB
DC Shifter
+Vcc 4
SO8
8 OUT1
7 OUT2
6 OUT3
5 GND
This datasheet gives technical information on
using the TSH173 as a R-G-B, Y-Pb-Pr, or Y-C-
CVBS driver for video DAC outputs on a video line.
The TSH173 is available in SO8 plastic package.
March 2007
Rev 1
1/13
www.st.com
13