The low-power, high-speed transceivers of this family are designed for RS-485, RS-422 and RS-423 communication applications. They usually contain one driver and one receiver in half duplex configuration. Each driver output and receiver input is protected against electrostatic discharge up to ± 15 kV and has no latch-up. These transceivers operate with a 5 V supply and draw a very low supply current when unloaded or fully loaded but with disabled drivers.
A SERCOS interface controller for industrial control systems enables real-time communication via optical fiber rings, RS-485 rings and RS-485 buses.

Low-power RS-485 transceiver with selectable data rate and compatible with 1.8 V I/Os
A 3.3 V differential line transceiver for RS-485 data transmissions in half-duplex mode, the STR485LV includes an external slew rate select pin able to switch between a fast data rate up to 20 Mbps or a slow data rate up to 250 kbps for longer cables.
Able to interface directly with voltage logic from 1.8 to 3.3 V, this differential driver/receiver is robust over fast transient burst IEC61000-4-4 Class B conditions and the bus pins withstand over ±8kV contact discharge and ±16kV air discharge conditions without latch-up, exceeding IEC 61000-4-2 specifications.
Available in a small (3 x3 mm) DFN10 package with a temperature range from –40 up to +105 °C, the STR485LV is a perfect fit for a wide range of applications including telecom infrastructure, high-speed data links, and low-voltage microcontroller communications.
- STR485E 3.3V RS485 compatible with 1.8V I/Os and selectable speed 20Mbps or 250kbps
- ST1480US 3.3V powered, 15kV ESD protected, up to 12Mbps true RS-485/RS-422 transceiver
- ST4485EB 3.3 V Powered, 15 kV ESD protected, up to 20 Mbps RS-485/RS-422 transceiver, [-40oC, 105oC] temperature range
- ST3485EC 3.3 V Powered, 15 kV ESD protected, up to 12 Mbps RS-485/RS-422 transceiver, [0oC, 70oC] temperature range
- ST3485EB 3.3 V Powered, 15 kV ESD protected, up to 12 Mbps RS-485/RS-422 transceiver, [-40oC, 85oC] temperature range
- ST3485EIY 3.3 V Powered, 15 kV ESD protected, up to 12 Mbps RS-485/RS-422 transceiver, automotive grade
- ST485ERB 15 kV ESD protected, low-power RS-485/RS-422 transceiver
- ST485EC 15 kV ESD protected, low power RS-485/RS-422 transceiver
- ST485EB 15 kV ESD protected, low power RS-485/RS-422 transceiver
- STR485 3.3V RS485 compatible with 1.8V I/Os and selectable speed 20Mbps or 250kbps
- ST1480AC 3.3V powered, 15kV ESD protected, up to 12Mbps true RS-485/RS-422 transceiver
- ST26C32AB CMOS quad 3-state differential line receiver
- ST26C31B CMOS quad 3-state differential line driver
- ST485C Low power RS-485/RS-422 transceiver
- ST3485EI 3.3 V Powered, 15 kV ESD protected, up to 12 Mbps RS-485/RS-422 transceiver, [-40oC, 125oC] temperature range
- ST485B Low power RS-485/RS-422 transceiver
- ST490AB Low power high speed RS-485/RS-422 transceiver
- SERC816 SERCOS Interface controller
- ST485AB Very high speed low power RS-485/RS-422 transceiver
- ST485EX 15 kV ESD protected, low-power RS-485/RS-422 transceiver
- ST1480AB 3.3V POWERED, 15KV ESD PROTECTED TRANSMIT AT UP TO 12MBPS TRUE RS-485/RS422 TRANSCEIVER, [-40oC, 85oC] TEMPERATURE RANGE