DS34C87T

Features:

TTL input compatible
Typical propagation delays: 6 ns
Typical output skew: 0.5 ns
Outputs won't load line when V_CC = 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




Pinout






Specifications

If Military/Aerospace specified devices are required,pleasecontacttheNationalSemiconductorSalesOffice/Distributors for availability and specifications.
Supply Voltage (V_CC ) -0.5 to 7.0V
DC Voltage (V_IN ) -1.5 to V_CC+1.5V
DC Output Voltage (V_OUT ) -0.5 to 7V
Clamp Diode Current (I_IK ,I_OK ) ±20 mA
DC Output Current, per pin (I_OUT) ±150 mA
DC V_CC or GND Current (I_CC ) ±150 mA
Storage Temperature Range (T_STG) -65 to +150
Maximum Power Dissipation (P_D) @ 25 (Note 3)
Plastic "N" Package 1736 mW
SOIC Package 1226 mW
Lead Temperature (TL)(Soldering 4 sec) 260
This device does not meet 2000V ESD rating. (Note 12)




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 spe-cial 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 of DS34C87T are protected against damage due to electrostatic discharge by diodes to V_CC and ground.