1 Features

• 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

• Pin Compatible With AM26LS31, MC3487, and

μA9638

• Cold Sparing for Space and High-Reliability

Applications Requiring Redundancy

2 Applications

• Wireless Infrastructure

• Telecom Infrastructure

• Printers

3 Description

The SN55LVDS31, SN65LVDS31, SN65LVDS3487,

and SN65LVDS9638 devices are differential line

drivers that implement 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. Any of the four current-mode drivers

will deliver a minimum differential output voltage

magnitude of 247 mV into a 100-Ω load when

enabled.