MAX3280EAUK-T

Overview

The MAX3280EAUK-T is a single receiver designed for RS-485 and RS-422 communication, housed in a 5-pin SOT23 package. It guarantees data rates up to 52Mbps with a supply voltage range of 3V to 5.5V. The device features true fail-safe circuitry that ensures a logic-high output when inputs are open or shorted. Key electrical parameters include a maximum propagation delay of 15ns, a receiver skew time of 2ns, and package-to-package skew of 8ns. It supports up to 128 receivers on the bus due to its 1/4-unit-load input impedance and operates within an extended temperature range of -40°C to +125°C.

Feature Summary

• True fail-safe architecture guarantees a high receiver output when inputs are open or shorted.
• Integrated ESD protection structures withstand ±15kV Human Body Model discharges.
• Low package-to-package skew time enables precise multidrop clock distribution applications.
• Thermal protection limits power dissipation by entering high-impedance mode during output short circuits.

Applications

• Multidrop clock distribution networks
• Telecom racks and base stations
• Industrial control systems
• Local area networks

Procurement Notes

Verify the component against official Maxim Integrated datasheets to confirm pinout compatibility and electrical specifications. Ensure the operating environment remains within the specified -40°C to +125°C temperature range. Check for any specific handling requirements related to the SOT23-5 package during assembly processes.

Selection Notes

Select this component when a compact single receiver is required for RS-485 or RS-422 buses. It is suitable for designs needing high-speed data transmission up to 52Mbps with minimal propagation delay. Consider the 1/4-unit-load capability if connecting multiple receivers to a single bus line.

Part Context

This part belongs to the MAX3280E family of single receivers from Analog Devices / Maxim Integrated. Other variants in the series include the MAX3281E, MAX3283E, and MAX3284E, which offer additional features such as enable pins or low-voltage logic compatibility while maintaining similar performance characteristics.

Replacement Considerations

Direct substitutes within the same family include the MAX3281EAUT-T and MAX3283EAUT-T, though these utilize a 6-pin SOT23 package and include enable functionality. The MAX3284EAUT-T also uses a 6-pin package but adds a VL pin for low-voltage logic interfacing.

FAQ

What is the guaranteed receiver output state when the inputs are left open?

The true fail-safe circuitry guarantees a logic-high receiver output when the receiver inputs are opened or shorted.

How many receivers can be connected to a single bus using this device?

Due to its 1/4-unit-load receiver input impedance, up to 128 receivers can be placed on the same bus.

What is the maximum package-to-package skew time for this device?

The maximum package-to-package skew time is guaranteed to be 8ns, making it suitable for clock distribution applications.