1-Mbps full-duplex 2.5-kVrms isolated RS-485 & RS-422 transceiver with integrated transformer driver

The ISO35T is an isolated differential

line transceiver with integrated oscillator outputs that provide the primary voltage

for an isolation transformer. The device is a full-duplex differential line

transceiver for RS-485 and RS-422 applications that can easily be configured for

half-duplex operation by connecting pin 11 to pin 14, and pin 12 to pin 13.

These devices are ideal for long

transmission lines since the ground loop is broken to allow for a much larger

common-mode voltage range. The symmetrical isolation barrier of the device is tested

to provide 4242V PK of isolation per VDE for 60s between the bus-line

transceiver and the logic-level interface.

Any cabled I/O can be subjected to

electrical noise transients from various sources. These noise transients can cause

damage to the transceiver and/or near-by sensitive circuitry if they are of

sufficient magnitude and duration. The ISO35T can significantly reduce the risk of

data corruption and damage to expensive control circuits.

The ISO35T is specified for use from

–40°C to 85°C.