Product category:
Communications ICs (Wired)
News Release from: Intersil | Subject: ISL4486 and ISL81486
Edited by the Electronicstalk Editorial
Team on 16 April 2004
Serial transceivers speed to Profibus
applications
The ISL4486 and ISL81486 are new ultra-high-speed Linearlink RS485/422 serial data transceivers.
The ISL4486 and ISL81486 are new ultra-high-speed Linearlink RS485/422 serial data transceivers Both ICs are half-duplex configurations that operate from a nominal 5V supply over a wide +/-10% tolerance voltage range of +4.5 to +5.5V, which relaxes supply requirements and reduces costs
This article was originally published on Electronicstalk on 8 Oct 2008 at 8.00am (UK)
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The ISL4486 provides an ultra-fast 40Mbit/s datarate and an industry-leading 2.5V differential signal into a 54ohm load.
The ISL81486 delivers 30Mbit/s and a 2.3V differential output voltage.
The ISL4486 and ISL81486 are rated as 0.6-unit load transceivers that allow 50 nodes on a bus compared to the usual single-unit load allowance of only 32 nodes.
Applications for these half-duplex transceivers include, but are not limited to, Profibus DP or FMS for factory automation, SCSI "Fast 40" and "Fast 20" drivers and receivers, fieldbus networks, security networks, process control, plant environmental control and remote sensing and metering.
The ultrahigh datarates and large differential output voltages make these new transceivers ideal for Profibus applications where speed, reach and data integrity are essential.
The low data skewing and part-to-part performance consistency make them ideal for parallel applications such as high-speed SCSI systems.
The ISL4486 and ISL81486 are half-duplex transceivers whose receive (Rx) and transmit (Tx) functions are multiplexed, reducing package size and pin count to only eight leads.
Rx inputs feature a fail-safe-if-open design, which ensures a logic high Rx output if Rx inputs are floating.
This prevents the Rx output from chattering, and accidentally generating interrupts, if the receiver becomes disconnected from the bus.
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.
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