September 2005
LMH6574
4:1 High Speed Video Multiplexer
General Description
Features
n 500 MHz, 500 mV −3 dB bandwidth, AV = 2
™
The LMH 6574 is a high performance analog multiplexer
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 VPP output signal levels. Multimedia
and high definition television (HDTV) applications can ben-
efit from the LMH6574’s 0.1 dB bandwidth of 150 MHz and
its 2200 V/µs slew rate.
n 400 MHz, 2VPP −3 dB bandwidth, AV = 2
n 8 ns channel switching time
@
n 70 dB channel to channel isolation 10 MHz
n 0.02%, 0.05˚ diff. gain, phase
n 0.1 dB gain flatness to 150 MHz
n 2200 V/µs slew rate
n Wide supply voltage range: 6V ( 3V) to 12V ( 6V)
@
n −68 dB HD2 5 MHz
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
@
n −84 dB HD3 5 MHz
75Ω load. An 80 mA linear output current is available for Applications
driving multiple video load applications.
n Video router
The LMH6574 gain is set by external feedback and gain set
resistors for maximum flexibility.
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
The LMH6574 is available in the 14 pin SOIC package.
Connection Diagram
Truth Table
A1
A0
EN
0
SD
0
OUT
CH 3
14-Pin SOIC
1
1
1
0
0
0
CH2
0
1
0
0
CH1
0
0
0
0
CH 0
X
X
X
X
1
0
Disable
Shutdown
X
1
20119705
Top View
Ordering Information
Package
Part Number
LMH6574MA
LMH6574MAX
Package Marking
LH6574MA
Transport Media
55 Units/Rail
NSC Drawing
14-Pin SOIC
M14A
2.5k Units Tape and Reel
™
LMH is a trademark of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation
DS201197
www.national.com