DS3691  Product Folder

The DS1691A/DS3691 are low power Schottky TTL line drivers designed to meet the requirements of EIA standards RS-422 and RS-423. They feature 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 DS1691A/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.

• Dual RS-422 line driver with mode pin low, or quad RS-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 in TRI-STATE
• 100 Ohm transmission line drive capability
• Low I_CC and I_EE 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 and CMOS
• Pin compatible with AM26LS30