DATASHEET
ISL4489E, ISL4491E FN6074
Rev.3.00
April 28, 2006 В±15kV ESD Protected, 1/8 Unit Load, 5V, Low Power, High Speed and Slew Rate
Limited, Full Duplex, RS-485/RS-422 Transceivers
The ISL4489E, ISL4491E are ESD protected, “fractional”
unit load, BiCMOS, 5V powered, single transceivers that
meet both the RS-485 and RS-422 standards for balanced
communication. Each driver output and receiver input is
protected against В±15kV ESD strikes, without latch-up.
Unlike competitive versions, these Intersil devices are
specified for 10% tolerance supplies (4.5V to 5.5V). Features Rx inputs and Tx outputs present a “1/8 unit load” to the
RS-485 bus, which allows a total of 256 transmitters and
receivers on the network for large node count systems. High Data Rates (ISL4491E) . up to 15Mbps These devices are configured for full duplex (separate Rx
input and Tx output pins) applications, so they are ideal for
RS-422 networks requiring high ESD tolerance on the bus
pins. Very Low Quiescent Current:
-140пЃA (ISL4489E)
-370пЃA (ISL4491E) Pb-free Available as an Option (RoHS Compliant)
(See Ordering Info) RS-485 I/O Pin ESD Protection пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ пЂ®пЂ п‚±15kV HBM
-Class 3 ESD Level on all Other Pins >7kV HBM 1/8 Unit Load Allows up to 256 Devices on the Bus Slew Rate Limited Version for Error Free Data
Transmission (ISL4489E) -7V to +12V Common Mode Input Voltage Range The ISL4489E utilizes a slew rate limited driver which
reduces EMI, and minimizes reflections from improperly …