LMH6574

4:1 High Speed Video Multiplexer

General Description

optimized for professional grade video and other high fidelity

high bandwidth analog applications. The output amplifier

selects any one of four buffered input signals based on the

state of the two address bits. The LMH6574 provides a 400

MHz bandwidth at 2 V

high definition television (HDTV) applications can benefit

from the LMH6574’s 0.1 dB bandwidth of 150 MHz and its

2200 V/µs slew rate.

The LMH6574 supports composite video applications with its

0.02% and 0.05˚ differential gain and phase errors for NTSC

and PAL video signals while driving a single, back terminated

75

Ω load. An 80 mA linear output current is available for

driving multiple video load applications.

The LMH6574 gain is set by external feedback and gain set

resistors for maximum flexibility.

The LMH6574 is available in the 14 pin SOIC package.

Features

n

500 MHz, 500 mV −3 dB bandwidth, A

n

400 MHz, 2V

n

8 ns channel switching time

n

n

0.02%, 0.05˚ diff. gain, phase

n

0.1 dB gain flatness to 150 MHz

n

2200 V/µs slew rate

n

n

n

Applications

n

Video router

n

Multi input video monitor

n

Instrumentation / Test equipment

n

Receiver IF diversity switch

n

Multi Channel A/D Driver

n

Picture in Picture video switch

Connection Diagram

14-Pin SOIC

20119705

Top View

Truth Table

A1

A0

EN

SD

OUT

1

100

CH 3

1

000

CH2

0

100

CH1

0

000

CH 0

X

X

1

0

Disable

X

X

X

1

Shutdown

Ordering Information

Package

Part Number

Package Marking

Transport Media

NSC Drawing

14-Pin SOIC

LMH6574MA

LH6574MA

55 Units/Rail

M14A

LMH6574MAX

2.5k Units Tape and Reel

November 2004

© 2004 National Semiconductor Corporation

DS201197

www.national.com