ISL3179EFUZ

Overview

The ISL3179EFUZ is a single RS-485/RS-422 transceiver manufactured by Renesas Electronics. It operates on a single 3.3V supply and supports data rates up to 40 Mb/s. The device features ±15kV IEC61000 ESD protection on the bus pins and full fail-safe receiver inputs that ensure a logic high output when inputs are floating, shorted, or undriven. It utilizes a true 1/8 unit load design, allowing up to 256 devices on the network without repeaters. The component includes hot-plug circuitry to maintain three-state outputs during power-up and offers current limiting with thermal shutdown for driver overload protection. It is housed in an MSOP-8 package.

Feature Summary

• High ESD protection meeting IEC61000 standards on RS-485 I/O pins
• Full fail-safe receiver design for reliable operation under open or short conditions
• True 1/8 unit load capability supporting extensive network node counts
• Hot-plug functionality maintaining high impedance states during power transitions

Applications

• Remote utility meter reading systems requiring high node density
• Industrial automation networks utilizing RS-485 communication
• Building automation and control systems
• Data acquisition systems with multiple sensor nodes

Procurement Notes

Verify the specific suffix 'EFUZ' against official Renesas documentation to confirm the MSOP-8 package and temperature range specifications. Ensure compatibility with system voltage requirements of 3.3V. Confirm lead-free status and RoHS compliance through the manufacturer's datasheet before integration into production designs.

Selection Notes

Select this component for applications requiring robust ESD protection and high noise immunity in half-duplex RS-485 environments. The low quiescent current and small package size make it suitable for space-constrained portable or battery-operated devices. Compare against the ISL3172E if slew-rate limited drivers are needed to reduce EMI.

Part Context

The ISL3179E belongs to the ISL317xE family of high-speed, low-power transceivers designed for balanced communication lines. This series integrates advanced protection features and fail-safe logic to enhance reliability in noisy industrial settings. The EFUZ variant specifically denotes the MSOP-8 packaging option within this product line.

Replacement Considerations

The ISL3172E serves as a functional alternative within the same family, offering similar protection but with slew-rate limited drivers. Verify pinout compatibility and electrical parameters such as data rate and unit load specifications before substituting.