NOT RECOMMENDED FOR NEW DESIGNS
FOR EXACT REPLACEMENT SEE
ISL32490E Series Datasheet DATASHEET ISL31490E, ISL31491E, ISL31492E, ISL31493E, ISL31495E,
ISL31496E, ISL31498E
The ISL31490E, ISL31491E, ISL31492E, ISL31493E,
ISL31495E, ISL31496E, ISL31498E are fault protected, 5V
powered, differential transceivers that exceed the RS-485 and
RS-422 standards for balanced communication. The RS-485
transceiver pins (driver outputs and receiver inputs) are
protected against faults up to В±60V. Additionally, the extended
common mode range allows these transceivers to operate in
environments with common mode voltages up to В±25V (>2x the
RS-485 requirement), making this RS-485 family one of the
most robust on the market.
Transmitters deliver an exceptional 2.5V (typical) differential
output voltage into the RS-485 specified 54О© load. This yields
better noise immunity than standard RS-485 ICs, or allows up
to six 120О© terminations in star network topologies. FN7637
Rev 3.00
May 13, 2015 Features Fault protected RS-485 bus pins up to В±60V Extended common mode range В±25V
More than twice the range required for RS-485 1/4 unit load for up to 128 devices on the bus High transient overvoltage tolerance В±80V Full fail-safe (open, short, terminated) RS-485 receivers High Rx IOL for opto-couplers in isolated designs Hot plug circuitry -Tx and Rx outputs remain three-state
during power-up/power-down Choice of RS-485 data rates 250kbps to 15Mbps Receiver (Rx) inputs feature a “Full Fail-safe” design, which
ensures a logic high Rx output if Rx inputs are floating, shorted, …