1FEATURES

2? DC - 125 MHz / 250 Mbps Low Jitter, Low

Skew, Low Power Operation

? Wide Input Common Mode Voltage Range

Allows up to ±1V of GND Noise

? Conforms to TIA/EIA-899 M-LVDS Standard

? Pin Selectable M-LVDS Receiver Type (1 or 2)

? Controlled Transition Times (2.0 ns typ)

Minimize Reflections multi?

8 kV ESD on M-LVDS I/O pins protects

adjoining components

? Flow-Through Pinout Simplifies PCB Layout

? Small 5 mm x 5 mm WQFN-32 Space Saving

Package

APPLICATIONS

? Multidrop / Multipoint Clock and Data MDistribution

? High-Speed, Low Power, Short-Reach

Alternative to TIA/EIA-485/422

? Clock Distribution in AdvancedTCA (ATCA)

and MicroTCA (μTCA, uTCA) Backplanes

DESCRIPTION

The DS91M040 is a quad M-LVDS transceiver

designed for driving / receiving clock or data signals

to / from up to four multipoint 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 current to

handle double terminations that are required in multi?

point applications. Controlled transition times minimize reflections that are common in multipoint

configurations due to unterminated stubs. M-LVDS

devices also have a very large input common mode

voltage range for additional noise margin in heavily

loaded and noisy backplane environments.

A single DS91M040 channel is a half-duplex

transceiver that accepts LVTTL/LVCMOS signals at

the driver inputs and converts them to differential MDistribution

LVDS signal levels. The receiver inputs accept low voltage differential signals (LVDS, BLVDS, M-LVDS,

LVPECL and CML) and convert them to 3V LVCMOS

signals. The DS91M040 supports both M-LVDS type

1 and type 2 receiver inputs.