ISL3179EIUZ

ISL3179EIUZ is a high ESD protected 3.3V powered, single transceiver that meet both the RS-485 and RS-422 standards for balanced communication. Each device has low bus currents, so this present 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. This half duplex version device multiplexes the Rx inputs and Tx outputs to allow a transceiver with an output disable function. Hot plug circuitry ensures that the Tx and Rx outputs remain in a high impedance state while the power supply stabilizes. Application includes motor controller/position encoder systems, factory automation, field bus networks, security networks, building environmental control systems, industrial/process control networks.

• High ESD protection on RS-485 I/O pins, ±16.5kV IEC61000
• <gt/>9kV class 3 HBM level on all other pins
• Half duplex, 3.3VCC, 1.5VOD, 40Mbps data rate
• 5V tolerant logic inputs
• 1/5 unit load allows up to 160 devices on the bus
• Full fail-safe (open, shorted, terminated/undriven) receiver
• Hot plug - Tx and Rx outputs remain three-state during power-up
• 4mA maximum low quiescent current, 1µA maximum low current shutdown mode
• Three-state Rx and Tx outputs, current limiting and thermal shutdown for driver overload protection
• 8 lead MSOP package, operating temperature range from -40°C to +85°C