ISL3172EIUZ

The Intersil ISL3172EIBZ-T are ±15kV IEC61000 ESD Protected, 3.3V-powered, single transceivers that meet both the RS-485 and RS-422 standards for balanced communication. These devices have very low bus currents (+125mA/-100mA), so they present a true “1/8 unit load” to the RS-485 bus. This allows up to 256 transceivers on the network without violating the RS-485 specification’s 32 unit load maximum, and without using repeaters. For example, in a remote utility meter reading system, individual meter readings are routed to a concentrator via an RS-485 network, so the high allowed node count minimizes the number of repeaters required. The ISL3172EIBZ-T are configured for full duplex (separate Rx input and Tx output pins) applications. The half duplex versions multiplex the Rx inputs and Tx outputs to allow transceivers with output disable functions in 8 Ld packages.

• IEC61000 ESD Protection on RS-485 I/O Pins ±15kV
• Class 3 ESD Level on all Other Pins : >7kV HBM
• Full Fail-safe (Open, Short, Terminated/Floating) Receivers
• Hot Plug - Tx and Rx Outputs Remain Three-state During Power-up
• True 1/8 Unit Load Allows up to 256 Devices on the Bus
• Single 3.3V Supply
• High Data Rates : 0.25 Mbps
• Low Quiescent Supply Current : 800 µA (Max)
• Ultra Low Shutdown Supply Current : 10 nA
• -7V to +12V Common Mode Input/Output Voltage Range
• Half and Full Duplex Pinouts
• Three State Rx and Tx Outputs Available
• Current Limiting and Thermal Shutdown for driver Overload Protection
• Tiny MSOP Packages Consume 50% Less Board Space
• Pb-Free (RoHS Compliant)