TSH346ID datasheet(1/18 Pages) STMICROELECTRONICS

Il numero della parte	TSH346ID

Spiegazioni elettronici	Triple video buffer/filter for HD video applications

PDF	18 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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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

36MHz

LPF

+

4

B in

5

B out

GND

36MHz

LPF

36MHz

LPF

SO-8

(plastic package)

www.st.com

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