MAX3181EUK+T

Overview

The MAX3181EUK+T is a single RS-232 receiver in a SOT23-5 package designed for space-constrained applications. It operates on a +3.0V to +5.5V supply with a typical supply current of 0.5µA and guarantees true RS-232 performance up to a 1.5Mbps data rate. The device features an INVALID output that indicates valid RS-232 signals at the receiver input, supporting automatic system wake-up functions. It provides standard inverting output logic and includes enhanced ESD protection on the receiver inputs.

Feature Summary

• INVALID output indicates valid RS-232 signal presence at the receiver input
• Enhanced electrostatic discharge protection on receiver inputs
• Standard inverting receiver output logic

Applications

• Diagnostic Ports
• Telecommunications
• Networking Equipment
• Set-Top Boxes
• Hand-Held Equipment

Procurement Notes

Verify component authenticity through authorized Analog Devices or Maxim Integrated distributors. Confirm the specific suffix matches the required temperature range and packaging format. Request original manufacturer datasheets to validate electrical characteristics against design requirements before finalizing procurement decisions.

Selection Notes

Select this component when low power consumption and minimal footprint are critical for RS-232 communication interfaces. The INVALID output feature makes it suitable for systems requiring automatic wake-up capabilities based on signal presence. Ensure the application environment stays within the specified -40°C to +85°C operating temperature range.

Part Context

This part belongs to the MAX3180E–MAX3183E family of single RS-232 receivers. Variants differ by output type (inverting vs. noninverting) and control features (enable pin vs. invalid detector). All share the same compact SOT23-5 package and core electrical specifications for low-power serial communications.

Replacement Considerations

Direct functional substitutes include MAX3180EUK+T, MAX3182EUK+T, and MAX3183EUK+T from the same series. Verify pin compatibility and specific output logic requirements when considering these alternatives.

FAQ

What is the function of the INVALID output?

The INVALID output goes high when a valid RS-232 signal level is applied to the receiver input and goes low if no valid signal levels appear for approximately 30µs, indicating cable disconnection or transmitter shutdown.

Does the MAX3181EUK+T have an enable pin?

No, the MAX3181EUK+T does not feature an enable (EN) pin. It relies on the INVALID output for signal status indication rather than software-controlled output tri-stating.

What is the maximum data rate supported?

The device guarantees true RS-232 performance up to a maximum data rate of 1.5Mbps.