ISL3179EIBZ

Intersil’s ISL3179E and ISL3180E are high ESD Protected 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each device has low bus currents (+220µA/-150µA), so it presents a “1/5 unit load” to the RS-485 bus. This allows up to 160 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters. Receiver (Rx) inputs feature a “full fail-safe” design, which ensures a logic high Rx output if Rx inputs are floating, shorted, or terminated but undriven. The ISL3179E half duplex version multiplexes the Rx inputs and Tx outputs to allow a transceiver with an output disable function in 8 Ld packages.

• 3.3V powered
• Specified for 125°C operation
• Full failsafe receiver
• Current limiting and thermal shutdown for driver overload protection
• Three-state Rx and Tx outputs
• 1/5 unit-load (up to 160 nodes on the bus)
• Hot plug - Tx and Rx outputs remain three-state during power-up
• 4mA maximum low quiescent current
• 1µA maximum low current shutdown mode