The DS3691 is a low power Schottky TTL line driver designed to meet the requirements of
EIA standards RS-422 and RS-423. It features 4 buffered outputs with high source and sink current
capability with internal short circuit protection. A mode control input provides a choice of
operation either as 4 single-ended line drivers or 2 differential line drivers. A rise time control
pin allows the use of an external capacitor to slow the rise time for suppression of near end
crosstalk to other receivers in the cable. Rise time capacitors are primarily intended for
waveshaping output signals in the single-ended driver mode. Multipoint applications in differential
mode with waveshaping capacitors is not allowed.
With the mode select pin low, the DS3691 are dual-differential line drivers with
TRI-STATE outputs. They feature ±10V output common-mode range in TRI-STATE mode and 0V output
unbalance when operated with ±5V supply.
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