ISL3179EIRZ-T

Overview

The ISL3179EIRZ-T is a half-duplex RS-485/RS-422 transceiver manufactured by Renesas Electronics. It operates on a single 3.3V supply with a maximum voltage of 3.6V and supports data rates up to 40 Mb/s. The device features high ESD protection, meeting IEC-61000 standards, and includes full fail-safe receiver inputs that ensure a logic high output when inputs are floating or undriven. It utilizes a DFN-EP-10 surface-mount package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• High electrostatic discharge (ESD) protection compliant with IEC-61000 standards for robust signal integrity.
• Full fail-safe receiver design guarantees a defined logic high state during input disconnection or termination errors.
• Low bus current consumption allows connection of up to 160 transceivers on a single network without repeaters.

Applications

• Industrial automation networks requiring reliable half-duplex communication.
• Building automation systems utilizing RS-485 bus topologies.
• Data acquisition systems needing high ESD immunity in electrically noisy environments.

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration. Confirm the 'E' designation aligns with extended temperature ranges if required for the application environment. Ensure compatibility with the DFN-EP-10 footprint during PCB layout verification.

Selection Notes

Select this component for applications requiring 3.3V operation with high-speed data transmission up to 40 Mbps. The half-duplex architecture suits bidirectional bus systems. Consider the thermal performance of the exposed pad DFN package for heat dissipation requirements in enclosed industrial enclosures.

Part Context

This part belongs to the ISL3179E series of high ESD protected transceivers. It shares functional similarities with the ISL3180E but differs in duplex capability, offering half-duplex operation compared to the full-duplex variant. Both devices support the same low unit load specifications for extensive network daisy-chaining.

Replacement Considerations

ISL3179EIBZ-T

FAQ

What is the maximum number of transceivers supported on the bus?

The device presents a 1/5 unit load, allowing up to 160 transceivers on the network without violating RS-485 specifications.

How does the fail-safe feature function?

The receiver ensures a logic high output if the differential inputs are floating, shorted, or terminated but undriven.