DATASHEET
ISL83483, ISL83485, ISL83488, ISL83490, ISL83491 FN6052
Rev 3.00
August 2004 3.3V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers
These Intersil RS-485/RS-422 devices are BiCMOS 3.3V
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 (3V to 3.6V).
The ISL83483 and ISL83488 utilize slew rate limited drivers
which reduce EMI, and minimize reflections from improperly
terminated transmission lines, or unterminated stubs in
multidrop and multipoint applications. Features Operate from a Single +3.3V Supply (10% Tolerance) Interoperable with 5V Logic High Data Rates . up to 10Mbps Single Unit Load Allows up to 32 Devices on the Bus Slew Rate Limited Versions for Error Free Data
Transmission (ISL83483, ISL83488) . .up to 250kbps Data rates up to 10Mbps are achievable by using the
ISL83485, ISL83490, or ISL83491, which feature higher
slew rates. Low Current Shutdown Mode (ISL83483, ISL83485,
ISL83491) . .15nA Logic inputs (e.g., DI and DE) accept signals in excess of
5.5V, making them compatible with 5V logic families. Three State Rx and Tx Outputs (Except ISL83488,
ISL83490) Receiver (Rx) inputs feature a “fail-safe if open” design,
which ensures a logic high output if Rx inputs are floating. All
devices present a “single unit load” to the RS-485 bus, which
allows up to 32 transceivers on the network. 10ns Propagation Delay, 1ns Skew (ISL83485, ISL83490,
ISL83491) Driver (Tx) outputs are short circuit protected, even for …