Single Transmitter/Receiver RS-422/RS-485 14-Pin MSOP T/R

The ISL31490E is 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 ±60V. Additionally, the extended common mode range allows these transceivers to operate in environments with common mode voltages up to ±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 54O load. This yields better noise immunity than standard RS-485 ICs, or allows up to six 120O terminations in star network topologies. Receiver (Rx) inputs feature a “Full Fail-safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. Rx outputs have high drive levels - typically 15mA at VOL = 1V (for opto-coupled, isolated applications). Half duplex (Rx inputs and Tx outputs multiplexed together) and full duplex pinouts are available.

• Fault protected RS-485 bus pins up to ±60V
• Extended common mode range ±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 ±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
• Low quiescent supply current 2.3mA
• Ultra low shutdown supply current 10µA
• Pb-free (RoHS compliant)