TSH173 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

TSH173

Triple video buffer with filter for SD video

STMicroelectronics 

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

5th order

6dB

IN2 2

8.2MHz

5th order

6dB

IN3 3

8.2MHz

5th 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

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