Intersil Corp. (Milpitas, CA) announced three new LINEARLINK™ RS-485/422 serial data transceivers, the ISL8487, ISL81483 and ISL81487. All three ICs are half-duplex, fractional-load transceivers that operate from a nominal 5V supply over a wide ±10% tolerance voltage range of +4.5V to +5.5V. The quiescent current for the devices is low and the ISL8487 and ISL81483 become almost invisible in the shutdown mode with a miniscule 1nA drip.
Applications for the fractional-load transceivers include factory automation, security networks, process control, plant environmental control, and remote sensing and metering. The ISL8487, ISL81483 and ISL81487 are half-duplex transceivers whose receive (Rx) and transmit (Tx) functions are multiplexed, reducing package size and pin count to only eight-leads. The Rx inputs feature a fail-safe-if-open design. A lock-out feature on the ISL8487 and ISL81483 keeps the Rx output disabled, when exiting shutdown, until the Rx has determined what state it should go to. Driver outputs are short-circuit protected, even for voltages that exceed the supply voltage. Additionally, on-chip, thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive.
The ISL8487, ISL81483 and ISL81487 are available now. Suggested resale pricing for 100-unit to 999-unit quantities is $1.20 each for either SOIC or PDIP packaging. SOIC packages are available on tape-and-reel.