ISL3179E

Description

Intersils ISL3179E and ISL3180E are high ESD Protected (see Table 1 below), 3.3V powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. Each device has low bus currents (+220A/-150A), 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 specifications 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 ISL3180E is configured for full duplex applications. 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. Hot Plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state while the power supply stabilizes.