RS-485/RS-422 single receiver delivers superior ESD protection in space-saving packages

The ISL328xE are fully featured receivers that provide 1/8 unit load input resistance (allowing up to 256 devices on the bus) and full fail-safe (open, short, and terminated but undriven), along with enhanced ESD protection on the Rx input pins. These receivers all operate from a wide supply range of 3.0V to 5.5V and at data rates up to 20Mb/s.

This family of receivers has low quiescent supply current (Icc) of 500µA max. – a factor of 30 times less than the value of the nearest competitor – making a significant improvement in power critical applications. Additionally, the devices with an enable pin (ISL3281E, ISL3282E, and ISL3283E) can be put into a low power shutdown mode (Icc = 20µA max) to reduce power consumption further whenever the receiver is disabled. The ISL3281E has an active high enable, while the ISL3282E and ISL3283E feature an active low enable for design flexibility.

The ISL3282E and the ISL3284E have on-board level translators on the enable input and Rx output pins, which simplify the design of mixed voltage systems. The logic supply pin (VL) can be connected to a lower voltage processor supply to level shift the input and output voltages to values compatible with the processor supply. This eliminates the need for external level translators.

The ISL328xE family is available in a variety of configurations: ISL3280E in a 5-lead SOT-23 package; ISL3281E in a 6-lead SOT-23 package; and ISL3283E and ISL3284E both in 6-lead SOT-23 packages. All of these SOT-23 packages occupy a 3mm x 3mm footprint. The ISL3282E is housed in a tiny 2mm x 3mm 8-lead TDFN package for additional board space savings and enhanced thermal performance. All versions are offered in a choice of industrial (-40º to +85ºC) and extended industrial (-40º to +125ºC) temperature ranges, for enhanced overall reliability.