ISL32277EFRZ

Overview

The ISL32277EFRZ is a quad receiver RS-422/RS-485 interface integrated circuit manufactured by Renesas Electronics. It operates within a supply voltage range of 3 V to 5.5 V and supports data rates up to 20 Mb/s. The device features four receivers housed in a QFN-EP-24 package, designed for surface mount installation. It provides robust electrostatic discharge protection rated at ±15 kV. The component functions reliably across an extended temperature range from -40 °C to +125 °C, with a typical operating supply current of 5.5 mA.

Feature Summary

• Quad differential receiver architecture supporting RS-422 and RS-485 communication standards
• High-speed data transmission capability reaching 20 megabits per second
• Integrated ±15 kilovolt electrostatic discharge protection on all signal lines
• Extended industrial temperature operation spanning negative forty to positive one hundred twenty-five degrees Celsius

Applications

• Industrial automation control networks requiring reliable multi-drop communication
• Building automation systems utilizing RS-485 bus topologies
• Factory equipment interfaces demanding high ESD immunity
• Data acquisition modules operating in electrically noisy environments

Procurement Notes

This component is officially designated as obsolete or end-of-life by the manufacturer. Verification of availability requires checking authorized distributors for remaining stock or surplus channels. Engineering teams must initiate replacement part qualification immediately due to discontinuation status. Supply chain risk is high; alternative sourcing strategies should be evaluated against production timelines.

Selection Notes

Designers requiring this specific quad receiver configuration must account for the discontinued status during the selection phase. Verify that the 20 Mb/s speed and 3 V to 5.5 V voltage range meet system requirements. Confirm compatibility with the QFN-EP-24 footprint if retaining the existing board layout. Evaluate successor devices from the same family or competitive equivalents that offer similar pinouts and electrical characteristics.

Part Context

The ISL32277EFRZ belongs to the ISL32277E series of RS-422/RS-485 interface components. This series focuses on providing multiple receivers in compact packages for complex bus architectures. The 'EFRZ' suffix indicates the specific tape-and-reel or tube packaging variant and lead-free compliance status defined by Renesas. It serves as a critical node interface in legacy industrial designs.

Replacement Considerations

Consult the official Renesas product change notification documents for confirmed substitute part numbers. Direct replacements must maintain the QFN-24 package and quad receiver functionality. Verify thermal performance and ESD ratings match the original specifications before finalizing any cross-reference.