DATASHEET
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491
5V, Low Power, High Speed or Slew Rate Limited, RS-485/R...
DATASHEET
ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491
5V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
FN6046 Rev 9.00 February 16, 2016
The Intersil RS-485/RS-422 devices are Bi
CMOS 5V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Unlike competitive devices, this Intersil family is specified for 10% tolerance supplies (4.5V to 5.5V).
The ISL8483, ISL8488, and ISL8489 utilize slew rate limited drivers which reduce EMI, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications.
Data rates up to 5Mbps are achievable by using the ISL8485, ISL8490, or ISL8491, which feature higher slew rates.
All devices present a “single unit load” to the RS-485 bus, which allows up to 32 transceivers on the network.
Receiver (Rx) inputs feature a “fail-safe if open” design, which ensures a logic high Rx output if Rx inputs are floating.
Driver (Tx) outputs are short circuit protected, even for
voltages exceeding the power supply
voltage. Additionally, on-chip thermal shutdown circuitry disables the Tx outputs to prevent damage if power dissipation becomes excessive.
The ISL8488 - 91 are configured for full duplex (separate Rx input and Tx output pins) applications. The ISL8488 and ISL8490 are offered in space saving 8 lead packages for applications not requiring Rx and Tx output disable functions (e.g., point-to-point). Half...