1 Features
1• TTL Input Compatible
• Typical Propagation Delays: 6 ns
• Typical Output Skew: 0.5 ns
• Outputs Will Not Load Line When VCC = 0 V
• DS26C31T Meets the Requirements of EIA
Standard RS-422
• Operation From Single 5-V Supply
• Tri-State Outputs for Connection to System Buses
• Low Quiescent Current
• Available in Surface Mount
• Mil-Std-883C Compliant

2 Applications
Differential Line Driver for RS-422 Applications

3 Description
The DS26C31 device is a quad differential line driver
designed for digital data transmission over balanced lines. The DS26C31T meets all the requirements of
EIA standard RS-422 while retaining the low power
characteristics of CMOS. The DS26C31M is
compatible with EIA standard RS-422; however, one
exception in test methodology is taken(2). This enables the construction of serial and terminal
interfaces while maintaining minimal power
consumption.
The DS26C31 accepts TTL or CMOS input levels and
translates these to RS-422 output levels. This part
uses special output circuitry that enables the drivers to power down without loading down the bus. This
device has enable and disable circuitry common to all four drivers. The DS26C31 is pin compatible to the
AM26LS31 and the DS26LS31.
All inputs are protected against damage due to
electrostatic discharge by diodes to VCC and ground.