MAX22026FAWA+T

Drivers, Receivers, Transceivers Overview

The MAX22026FAWA+T is a compact, isolated half-duplex RS-485/RS-422 transceiver featuring Maxim’s proprietary AutoDirection control. It provides 3.5kVRMS of digital galvanic isolation between the cable-side and UART-side. The device supports data rates up to 16Mbps with non-slew-rate-limited drivers. It operates with VDDA from 1.71V to 5.5V and VDDB from 4.75V to 5.25V. The receiver output always follows (VA-VB). Driver outputs and receiver inputs are protected from ±10kV ESD (HBM) to GNDB. It is housed in an 8-pin wide SOIC package and operates over -40°C to +85°C.

Drivers, Receivers, Transceivers Feature Summary

• AutoDirection control eliminates the need for separate driver-enable and receiver-enable signals by using an internal state machine.
• High-level integration reduces solution size through a fully isolated half-duplex design in a compact 8-pin wide body SOIC package.
• Integrated protection includes ±10kV ESD on driver outputs and receiver inputs, along with a failsafe receiver for input short or open events.

Drivers, Receivers, Transceivers Applications

• Utility Meters
• Industrial Automation Equipment
• Programmable Logic Controllers
• HVAC Systems

Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'F' indicates the inclusion of the failsafe receiver feature compared to standard variants. Confirm the 'AWA+' designation corresponds to the 8-pin wide SOIC package and RoHS compliance. Ensure the tape-and-reel packaging matches system requirements. Cross-reference the manufacturer's latest ordering guide for current production status and availability constraints.

Drivers, Receivers, Transceivers Selection Notes

Select this component when high-speed communication up to 16Mbps is required alongside robust galvanic isolation. The non-slew-rate-limited driver distinguishes it from the 0.5Mbps MAX22025/MAX22027 variants. Choose the 'F' version if failsafe operation during bus faults is necessary. Ensure the application can support the separate VDDA and VDDB power domains for optimal isolation performance.

Drivers, Receivers, Transceivers Part Context

This part belongs to the MAX22025-MAX22028/MAX22025F-MAX22028F family of compact isolated RS-485/RS-422 transceivers. The family shares common features like AutoDirection and 3.5kVRMS isolation but varies in data rate capabilities and receiver behavior. The MAX22026 variant specifically offers higher speed transmission without slew-rate limiting.

Drivers, Receivers, Transceivers Replacement Considerations

MAX22028FAWA+T: Offers identical functionality but with a receiver that always follows (VA-VB), whereas MAX22026 does not follow (VA-VB) during driver-enabled states.

Drivers, Receivers, Transceivers FAQ

How does the receiver output behave during transmission?

For the MAX22026, the receiver output does not follow (VA-VB) when the device is in the driver-enabled state, allowing for line interference detection.

What is the maximum data rate supported?

The MAX22026 supports transmit speeds up to 16Mbps due to its non-slew-rate-limited driver outputs.

What isolation voltage does the device withstand?

The device provides 3.5kVRMS of digital galvanic isolation for 60 seconds and withstands a maximum working isolation voltage of 445VRMS.