ISL32277EIRZ

Overview

The ISL32277EIRZ is a quad receiver integrated circuit designed for RS-422 and RS-485 communication standards. Manufactured by Renesas Electronics Corporation, this component operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic levels. It delivers a data rate capability of 20 Mb/s and features four independent receivers. The device incorporates robust electrostatic discharge protection rated at +/-15 kV. It is housed in a QFN-EP-24 surface-mount package and functions reliably across an operating temperature range from -40°C to +85°C.

Feature Summary

• Provides four differential receivers compliant with RS-422 and RS-485 interface specifications.
• Integrates high-level ESD protection rated at +/-15 kV on all bus pins.

Applications

• Industrial communication networks requiring RS-422/RS-485 connectivity
• Data acquisition systems utilizing multi-drop bus architectures
• Building automation controllers

Procurement Notes

Verify the specific ordering suffix against official Renesas documentation to confirm package type and tape-and-reel availability. Confirm RoHS compliance status through current datasheets. Ensure moisture sensitivity level handling procedures are followed during assembly. Cross-reference the manufacturer part number with authorized distributor catalogs to validate authenticity and current production status before procurement.

Selection Notes

Select this component when a quad receiver solution is required for RS-422 or RS-485 buses without integrated drivers. Verify that the 20 Mb/s data rate meets system timing requirements. Ensure the 3 V to 5.5 V supply voltage aligns with the target power rail. Confirm that the QFN-EP-24 package footprint fits the PCB layout constraints and thermal design specifications.

Part Context

This part belongs to the ISL32277E series of interface ICs. It serves as the receiver-only counterpart to transceiver variants within the same family. The component is categorized under RS-422/RS-485 Interface ICs in the Renesas product portfolio. It supports standard half-duplex and full-duplex communication topologies common in industrial environments.

Replacement Considerations

Check for direct pin-compatible alternatives within the Renesas ISL3227x family. Verify electrical parameters such as data rate and ESD ratings match the original design requirements. Consult official substitution guides for any functional differences between legacy Intersil and current Renesas manufacturing sources.