±16.5kV ESD Protected, +125 °C, 3.0V to 5.5V, SOT-23 Package, 20Mbps, Full Fail-safe, Low Power, RS-485/RS-422 Receivers

The ISL3280E is a ±16. 5kV IEC 61000 ESD protected, 3.0V to 5.5V powered, single receiver that meets both the RS-485 and RS-422 standards for balanced communication. This receiver has very low bus currents (+125µA/-100µA), so it presents a true “1/8 unit load” to the RS-485 bus. This allows up to 256 receivers on the network without violating the RS-485 specification's 32-unit load maximum and without using repeaters. Receiver inputs feature a “Full Fail-Safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven. The ISL3280E features an always-enabled Rx and is offered in industrial and extended industrial (-40 °C to +125 °C) temperature ranges. This device also features a logic supply pin (VL) that sets the VOH level of the RO output (and the switching points of the RE/RE input) to be compatible with another supply voltage in mixed voltage systems. For companion single RS-485 transmitters in micro packages, please see the ISL3293E datasheet.