', BALLOON, true, ABOVE, true)" title="ELECTROMAGNETIC">ELECTROMAGNETIC interference) sensitive designs, or to allow longer bus lengths. These devices also feature a logic supply voltage pin (VL) that sets the VOH level of logic outputs and the switching points of logic inputs, to be compatible with another supply voltage in mixed voltage systems.

When any port on each of the devices is in RS-232 mode, an on-board charge pump generates compliant ±5V output levels. Each transceiver is RS-232 compliant with the Rx outputs handling up to ±25V and the Tx output handling ±8V. In RS-485 mode, each transceiver supports RS-485 and RS-422 differential communication standards. The RS-485 receiver features full failsafe operation so output remains high even if inputs are open or shorted. The RS-485 transmitter supports as many as three data rates; two are slew-rate limited. Charge pumps are disabled when both ports on the dual port ICs are in RS-485 mode, to save POWER, minimize noise and eliminate pump capacitors.

Applications include single-board computers, factory automation systems, security networks, industrial and process control networks, point-of-sale equipment, gaming, and level transistors.

The ISL3331 and ISL3333 are available in small 40-pin QFN packages. The ISL3330 is available in a 20-lead SSOP and the ISL3332 is available in a 28-lead SSOP package, says the company.

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