LMH0044_09 Datasheet, PDF (1/8 Pages) National Semiconductor (TI) – SMPTE 292M / 259M Adaptive Cable Equalizer

LMH0044
July 15, 2009
SMPTE 292M / 259M Adaptive Cable Equalizer
General Description
The LMH0044 SMPTE 292M / 259M adaptive cable equalizer
is a monolithic integrated circuit for equalizing data transmit-
ted over cable (or any media with similar dispersive loss
characteristics). The equalizer operates over a wide range of
data rates from 125 Mbps to 1.485 Gbps and supports
SMPTE 292M, SMPTE 344M and SMPTE 259M.
The LMH0044 implements DC restoration to correctly handle
pathological data conditions (DC restoration may be by-
passed for low data rate applications). The equalizer may be
driven in either a single ended or differential configuration.
Additional features include separate carrier detect and output
mute pins which may be tied together to mute the output when
no signal is present. A programmable mute reference is pro-
vided to mute the output at a selectable level of signal degra-
dation.
Features
■ ^{SMPTE 292M, SMPTE 344M and SMPTE 259M}
compliant
■ ^{Supports DVB-ASI at 270 Mbps}
■ ^{Data rates: 125 Mbps to 1.485 Gbps}
■ ^{Equalizes up to 200 meters of Belden 1694A at 1.485}
Gbps or up to 400 meters of Belden 1694A at 270 Mbps
■ ^{Manual bypass and output mute with a programmable}
threshold
■ ^{Single-ended or differential input}
■ 50Ω differential outputs
■ ^{Single 3.3V supply operation}
■ ^{208 mW typical power consumption with 3.3V supply}
■ ^{Replaces the GS1574 and GS1574A}
Applications
■ ^{SMPTE 292M, SMPTE 344M, and SMPTE 259M serial}
digital interfaces
■ ^{Serial digital data equalization and reception}
■ ^{Data recovery equalization}
Typical Application
© 2009 National Semiconductor Corporation 201770
20177001
www.national.com