1FEATURES
2• TTL Input Compatible
• Typical Propagation Delays: 6 ns
• Typical Output Skew: 0.5 ns
• Outputs Won't Load Line When VCC = 0V
• Meets the Requirements of EIA Standard RS-
422
• Operation from Single 5V Supply
• TRI-STATE Outputs for Connection to System
Buses
• Low Quiescent Current
• Available in Surface Mount

DESCRIPTION
The DS34C87T is a quad differential line driver
designed for digital data transmission over balanced
lines. The DS34C87T meets all the requirements of
EIA standard RS-422 while retaining the low power
characteristics of CMOS. This enables the
construction of serial and terminal interfaces while maintaining minimal power consumption.
The DS34C87T accepts TTL or CMOS input levels
and translates these to RS-422 output levels. This
part uses special output circuitry that enables the
individual drivers to power down without loading down
the bus. This device has separate enable circuitry for
each pair of the four drivers. The DS34C87T is pin
compatible to the DS3487T.
All inputs are protected against damage due to
electrostatic discharge by diodes to VCC and ground.