ISL3177EIBZ-T

Overview

The ISL3177EIBZ-T 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 20 Mb/s. The device features ±15kV IEC61000 ESD protection and full fail-safe receiver inputs that ensure a logic high output when inputs are floating, shorted, or undriven. It presents a true 1/8 unit load, allowing up to 256 devices on the bus. Key electrical parameters include a maximum quiescent current of 800 µA and a shutdown current of 10 nA. The operating temperature range spans from -40°C to +85°C. It is housed in an SOIC-8 package.

Feature Summary

• Full fail-safe receiver design ensures defined logic states during open, shorted, or floating input conditions.
• Hot plug circuitry maintains three-state outputs during power-up stabilization.
• High node count capability via 1/8 unit load driver allows extensive network expansion without repeaters.

Applications

• Automated utility meter reading systems
• High node count field bus networks
• Security camera networks

Procurement Notes

Verify the complete part number including suffixes such as 'EIBZ-T' to confirm specific packaging and RoHS compliance status. Confirm the manufacturer source is Renesas Electronics or authorized Intersil distribution channels. Ensure the component matches the SOIC-8 package type and 3.3V operational voltage requirements for your specific interface design.

Selection Notes

Select this component for applications requiring high-speed communication up to 20 Mb/s with robust ESD protection. It is suitable for designs needing low power consumption and high noise immunity. Verify compatibility with existing 3.3V logic levels and ensure the system benefits from the ability to support up to 256 nodes on a single bus segment.

Part Context

This device belongs to the ISL317xE family of RS-485/RS-422 transceivers. The family includes variants with slew rate limited drivers (e.g., ISL3170E) and high-speed versions like the ISL3177E. All share common features such as 3.3V operation, fail-safe receivers, and hot plug capabilities, differing primarily in data rate specifications and driver slew rates.

Replacement Considerations

Direct substitutes within the same family include ISL3177EIBZ. Other compatible options may include ISL3172E or ISL3178E depending on specific duplex requirements and pinout configurations. Verify pin compatibility and electrical characteristics before substitution.

FAQ

What is the maximum data rate supported by the ISL3177EIBZ-T?

The ISL3177EIBZ-T supports data rates up to 20 Mb/s.

How does the fail-safe feature work?

The full fail-safe receiver design ensures a logic high output if the Rx inputs are floating, shorted together, or terminated but undriven.

What is the unit load specification?

The device presents a true 1/8 unit load to the RS-485 bus, allowing up to 256 transceivers on the network.