ISL3179EIBZ-T7A

Overview

The ISL3179EIBZ-T7A is a single RS-485 transceiver manufactured by Renesas Electronics, designed for balanced communication networks. It operates on a single 3.3V supply and supports data rates up to 40 Mb/s. The device features high ESD protection compliant with IEC61000 standards and incorporates full fail-safe receiver inputs that ensure a logic high output when inputs are floating or shorted. Hot plug circuitry maintains three-state outputs during power-up. It presents a 1/5 unit load to the bus, allowing up to 160 nodes without repeaters. Operating temperatures range from -40°C to +85°C, housed in an SOIC-Narrow-8 package.

Feature Summary

• High ESD protection on RS-485 I/O pins meeting IEC61000 requirements
• Full fail-safe receiver design ensures defined logic state under fault conditions
• Hot plug functionality keeps outputs in high impedance during power stabilization
• Low bus current consumption enables high node density on the network

Applications

• Remote utility meter reading systems requiring high node counts
• Industrial automation networks utilizing RS-485 protocols
• Building automation and control systems

Procurement Notes

Verify the specific suffix T7A indicates tape and reel packaging configuration. Confirm RoHS compliance status through official Renesas documentation. Ensure moisture sensitivity level handling procedures are followed upon receipt. Cross-reference the manufacturer part number with the distributor catalog to confirm exact pinout and electrical specifications match the design requirements.

Selection Notes

Select this component for applications requiring 3.3V operation with high-speed data transmission up to 40 Mbps. The 1/5 unit load characteristic makes it suitable for large networks needing more than 32 devices without repeaters. Choose this over slew-rate limited variants if faster edge rates are acceptable for shorter traces. Verify thermal performance within the specified industrial temperature range.

Part Context

This part belongs to the ISL3179E series of high ESD protected transceivers. It is distinct from the ISL3172E which offers lower speed but higher ESD robustness on all pins. The ISL3179E focuses on high-speed communication capabilities while maintaining standard RS-485 compatibility. It serves as a half-duplex solution for balanced line drivers.

Replacement Considerations

ISL3179EIUZ-T7A is a verified equivalent offering identical electrical characteristics in a UQFN package. Direct pin-to-pin replacement requires verifying package footprint differences between SOIC-8 and UQFN. Other series members like ISL3172E provide different speed and ESD profiles.