DS1691A

Features:

 Dual RS-422 line driver with mode pin low, or quadRS-423 line driver with mode pin high
  TRI-STATE outputs in RS-422 mode
  Short circuit protection for both source and sink outputs
  Outputs will not clamp line with power off or inTRI-STATE
  100Ω transmission line drive capability
  Low ICC and IEE power consumption
RS-422: I_CC = 9 mA/driver typ
RS-423: I_CC = 4.5 mA/driver typ:
             I _EE = 2.5 mA/driver typ
  Low current PNP inputs compatible with TTL, MOS andCMOS
  Pin compatible with AM26LS30


Specifications

Supply Voltage
V_CC............................................................... 7V
V_EE ...............................................................−7V
Maximum Power Dissipation (Note 1) at .......25˚C
Cavity Package ...................................1509 mW
Molded DIP Package........................... 1476 mW
SO Package....................................... .1051 mW
Input Voltage ..............................................15V
Output Voltage (Power OFF) ....................±15V
Storage Temperature ..............−65 to + 150
Lead Temperature
(Soldering, 4 seconds)........................... .. 260


Description

The DS1691A/DS3691 are low power Schottky TTL line driv-ers designed to meet the requirements of EIA standardsRS-422 and RS-423. They feature 4 buffered outputs withhigh source and sink current capability with internal short cir-cuit protection. A mode control input provides a choice of op-eration either as 4 single-ended line drivers or 2 differentialline drivers. A rise time control pin allows the use of an exter-nal capacitor to slow the rise time for suppression of nearend crosstalk to other receivers in the cable. Rise time ca-pacitors are primarily intended for waveshaping output sig-nals in the single-ended driver mode. Multipoint applicationsin differential mode with waveshaping capacitors is not al-lowed.

With the mode select pin low, the DS1691A/DS3691 aredual-differential line drivers with TRI-STATE outputs. Theyfeature ±10V output common-mode range in TRI-STATEmode and 0V output unbalance when operated with ±5Vsupply.