1FEATURES

• QML-V Qualified, SMD 5962-97621

• Meet or Exceed the Requirements of ANSI

TIA/EIA-644 Standard

• Low-Voltage Differential Signaling With Typical

Output Voltage of 350 mV and 100-Ω Load

• Typical Output Voltage Rise and Fall Times of

500 ps (400 Mbps)

• Typical Propagation Delay Times of 1.7 ns

• Operate From a Single 3.3-V Supply

• Power Dissipation 25 mW Typical Per Driver at

200 MHz

• Driver at High Impedance When Disabled or

With VCC = 0

• Bus-Terminal ESD Protection Exceeds 8 kV

• Low-Voltage TTL (LVTTL) Logic Input Levels

• Cold Sparing for Space and High Reliability

Applications Requiring Redundancy

DESCRIPTION

The SN55LVDS31 is a differential line driver that implements the electrical characteristics of low-voltage

differential signaling (LVDS). This signaling technique lowers the output voltage levels of 5-V differential standard

levels (such as TIA/EIA-422B) to reduce the power, increase the switching speeds, and allow operation with a

3.3-V supply rail. This driver will deliver a minimum differential output voltage magnitude of 247 mV into a 100-Ω

load when enabled.

The intended application of this device and signaling technique is both point-to-point and multidrop (one driver

and multiple receivers) data transmission over controlled impedance media of approximately 100 Ω. The

transmission media may be printed-circuit board traces, backplanes, or cables. The ultimate rate and distance of

data transfer is dependent upon the attenuation characteristics of the media and the noise coupling to the

environment.

The SN55LVDS31 is characterized for operation from –55°C to 125°C.