ISL3155EIUZ-T7A

Overview

The ISL3155EIUZ-T7A is a half-duplex RS-485 transceiver manufactured by Renesas Electronics. It operates within a supply voltage range of 3.0 V to 5.5 V and supports data rates up to 250 kbps. The device features integrated overvoltage protection on the bus pins, rated for ±60 V, ensuring robust performance in electrically noisy environments. It is housed in an 8-lead MSOP package and is designed for industrial applications with an operating temperature range from -40°C to +85°C.

Feature Summary

• Integrated overvoltage protection on differential bus pins withstands voltages up to ±60 V without damage.
• Supports high-voltage output drive capabilities suitable for long-distance communication networks.
• Includes fail-safe circuitry to ensure a logical high receiver output when the bus is idle or disconnected.

Applications

• Industrial automation control systems requiring reliable serial communication.
• Building automation and security network interfaces.
• Metering equipment in utility infrastructure.

Procurement Notes

Verify the specific suffix T7A indicates tape-and-reel packaging configuration. Confirm RoHS compliance status through official datasheets prior to integration. Check current availability as distribution channels may report limited stock or end-of-life statuses for older Intersil-branded components.

Selection Notes

Select this component when ±60 V overvoltage protection is required on RS-485 buses. Ensure the 250 kbps data rate meets system timing requirements. Verify that the MSOP-8 footprint aligns with PCB layout constraints compared to SOIC alternatives.

Part Context

This part belongs to the ISL3155E series of RS-485 transceivers. It shares functional similarities with other half-duplex devices in the family but is distinguished by its specific overvoltage tolerance and low-power shutdown modes. The component represents legacy Intersil technology now managed under the Renesas portfolio.

Replacement Considerations

ISL3155EIBZ-T7A (SOIC-8 package variant).

FAQ

What is the maximum overvoltage rating for the bus pins?

The bus pins are protected against continuous voltages up to ±60 V.

Does the device support full-duplex operation?

No, the ISL3155EIUZ-T7A is a half-duplex transceiver with one driver and one receiver.