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Quad receivers deliver 16.5kV ESD protection

Posted: 18 May 2010 ?? ?Print Version ?Bookmark and Share

Keywords:receiver? ESD? network?

ISL3217x, ISL3227x receivers

Intersil Corp. has developed a new family of small-footprint quad 16.5kV ESD-protected RS-485 and RS-422 receivers, featuring wide voltage and temperature ranges.

The new ISL3217x and ISL3227x series feature wide supply-voltage operating ranges of 3V to 5.5V and extended temperature ranges to 125C, making them suitable design choices for motor controllers, encoders, factory automation and process control networks.

The ISL32173E, ISL32175E and ISL32177E are high data-rate receivers that operate at up to 80Mbit/s. A maximum propagation delay skew of 8ns guarantees excellent part-to-part matching.

The ISL32273E, ISL32275E and ISL32277E are reduced supply current versions that operate at data rates up to 20Mbit/s. Each receiver also features low input currents of 200?A, and presents a one-fourth unit load to the RS-485 bus, allowing up to 128 receivers on the bus.

All of the new ICs also feature 16.5kV ESD protection, meeting HBM and IEC61000-4-2 standards on receiver inputs. The new ISL32177 and ISL32277 include a logic VL supply pin. The VL supply sets the switching points of the enable inputs, and the receiver output's VOH, to levels compatible with a lower supply voltage in mixed-voltage systems. This built-in voltage level translation eases operation in mixed-supply systems.

Pairing the quad receivers with Intersil's ISL32172/7/9 or ISL32272/4 quad transmitters enables a full point-to-point four-channel solution.

The ISL3217x and ISL3227x products are available now in 16-lead narrow SOIC and 16-lead TSSOP packages featuring industry-standard group or paired enables. The ISL32177 and ISL32277 come in compact 4mm x 4mm 24-lead QFN packages, with individual channel and group-enable functions. Prices start at $1.23 each in 1,000-piece quantities.

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