DS91M125 Datasheet, PDF (1/12 Pages) National Semiconductor (TI) – 125 MHz 1:4 M-LVDS Repeater with LVDS Input

DS91M125
November 9, 2009
125 MHz 1:4 M-LVDS Repeater with LVDS Input
General Description
The DS91M125 is a 1:4 M-LVDS repeater designed for driv-
ing and distributing clock or data signals to up to four multi-
point networks.
M-LVDS (Multipoint LVDS) is a new family of bus interface
devices based on LVDS technology specifically designed for
multipoint and multidrop cable and backplane applications. It
differs from standard LVDS in providing increased drive cur-
rent to handle double terminations that are required in multi-
point applications. Controlled transition times minimize re-
flections that are common in multipoint configurations due to
unterminated stubs.
A single DS91M125 channel is a 1:4 repeater that accepts
M-LVDS/LVDS/CML/LVPECL signals and converts them to
M-LVDS signal levels. Each output has an associated inde-
pendent driver enable pin. The DS91M125 input conforms to
the LVDS standard.
The DS91M125 has a flow-through pinout for easy PCB lay-
out. It provides a new alternative for high speed multipoint
interface applications. It is packaged in a space saving
SOIC-16 package.
Features
■ ^{DC - 125 MHz / 250 Mbps low jitter, low skew, low power}
operation
■ ^{Independent Driver Enable pins}
■ ^{Outputs Conform to TIA/EIA-899 M-LVDS Standard}
■ ^{Controlled transition times minimize reflections}
■ ^{Inputs Conform to TIA/EIA-644-A LVDS Standard}
■ ^{8 kV ESD on M-LVDS output pins protects adjoining}
components
■ ^{Flow-through pinout simplifies PCB layout}
■ ^{Industrial operating temperature range (−40°C to +85°C)}
■ ^{Available in a space saving SOIC-16 package}
Applications
■ ^{Multidrop / Multipoint clock and data distribution}
■ ^{High-Speed, Low Power, Short-Reach alternative to}
TIA/EIA-485/422
■ ^{Clock distribution in AdvancedTCA (ATCA) and MicroTCA}
(μTCA, uTCA) backplanes
Typical Application
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