ISL3178EIUZ-T

Overview

The ISL3178EIUZ-T is a single RS-422/RS-485 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, full fail-safe receivers, and hot-plug capability. It draws a maximum quiescent current of 800 µA and offers an ultra-low shutdown current of 10 nA. The component functions within a common-mode voltage range of -7V to +12V and is rated for industrial temperatures from -40°C to +85°C. It is housed in an MSOP-8 package.

Feature Summary

• IEC61000 ESD protection on RS-485 I/O pins with ±15kV Class 3 level
• Full fail-safe receiver design ensuring logic high output when inputs are floating or shorted
• Hot-plug circuitry maintaining three-state outputs during power-up stabilization
• True 1/8 unit load allowing up to 256 devices on the bus without repeaters

Applications

• Remote utility meter reading systems requiring high node counts
• Multipoint bus transmission lines for bidirectional communication
• Industrial environments with harsh operating conditions and high common-mode voltages

Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation. Ensure the MSOP-8 package dimensions match the target PCB footprint requirements. Validate that the 3.3V supply voltage aligns with the system design specifications before procurement.

Selection Notes

Select this component for applications requiring high-speed data transfer up to 20 Mb/s with robust ESD protection. The true 1/8 unit load characteristic makes it suitable for networks needing extensive node expansion. Consider the low quiescent current for power-sensitive designs. Verify compatibility with existing RS-422/RS-485 standards and interface requirements.

Part Context

This part belongs to the ISL317xE series of RS-485/RS-422 transceivers. It shares core features like ESD protection and fail-safe design with siblings such as the ISL3170E and ISL3175E. The primary distinction lies in its specific pinout and half-duplex configuration within the MSOP-8 package.

Replacement Considerations

Direct substitutes include other parts from the ISL317xE family, such as the ISL3175EIUZ-T, which share similar electrical characteristics and package types. Cross-reference datasheets to ensure pin compatibility and identical performance metrics before substitution.