MAX3280EAUK+

Overview

The MAX3280EAUK+ is a single RS-485/RS-422 receiver in a 5-pin SOT23 package. It supports data rates up to 52Mbps with a supply voltage range of 3V to 5.5V and operates from -40°C to +125°C. The device features true fail-safe circuitry, ensuring a logic-high output when inputs are open or shorted. It provides ±15kV Human Body Model ESD protection and has a 1/4-unit-load input impedance, allowing up to 128 receivers on the bus. Typical supply current is 15mA.

Feature Summary

• True fail-safe architecture guarantees a high receiver output if inputs are open or shorted.
• High electrostatic discharge protection rated at ±15kV via the Human Body Model.
• Low input impedance allows connection of up to 128 receivers on a single bus.
• Compact 5-pin SOT23 surface-mount package design.

Applications

• Multidrop clock distribution networks
• Telecom rack equipment interfaces
• Industrial control systems
• Automotive communication modules

Procurement Notes

Verify the specific suffix 'AUK+' against official manufacturer documentation to confirm lead-free status and RoHS compliance. Confirm that the automotive qualification indicated by '/V' is not required for this specific non-V variant. Ensure the ordering code matches the exact 5-pin SOT23 configuration before procurement.

Selection Notes

Select this component for applications requiring a single receiver with minimal pin count. It is suitable for standard RS-485 and RS-422 buses where fail-safe behavior is critical. Do not use if an enable pin is required; consider the MAX3281E or MAX3283E instead. Verify that the 52Mbps rate meets system timing requirements.

Part Context

This part belongs to the MAX328xE family of low-voltage transceivers designed for harsh electrical environments. It shares core specifications with the MAX3281E, MAX3283E, and MAX3284E but lacks the enable pin found in other variants. The family is optimized for multidrop applications requiring tight propagation delay matching.

Replacement Considerations

The MAX3280EAUK/V+T is an automotive-qualified version of this component. Other family members like the MAX3281EAUT+T provide similar functionality but include an active-high enable pin and utilize a 6-pin package.