MAX3227ECUE+T

Overview

The MAX3227ECUE+T is a single-driver, single-receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates on a +3.0V to +5.5V supply and guarantees a data rate of 1Mbps. The device features AutoShutdown Plus technology, reducing supply current to 1μA when inputs are inactive for over 30 seconds. It includes ±15kV ESD protection (Air-Gap, Contact, Human Body Model) and provides a READY output indicating charge pump regulation. The component is housed in a 16-pin TSSOP package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by shutting down internal charge pumps during periods of inactivity.
• Integrated dual charge pump generates required RS-232 voltage levels from a single low-voltage supply using minimal external capacitors.
• High electrostatic discharge protection ensures robustness against environmental interference across transmitter outputs and receiver inputs.

Applications

• Notebook, Subnotebook, and Palmtop Computers
• Cellular Phones
• Battery-Powered Equipment
• Hand-Held Equipment
• Peripherals

Procurement Notes

Verify the specific suffix 'E' confirms the commercial temperature range (0°C to +70°C) and 'U' indicates the TSSOP package type. Confirm the '+T' designation matches the required reel or cut tape packaging format for your assembly line. Cross-reference the manufacturer's official ordering guide to ensure the exact part number aligns with your bill of materials before finalizing procurement.

Selection Notes

Select this component for applications requiring full-duplex RS-232 communication at speeds up to 1Mbps with strict power constraints. Ensure the system design accommodates four small 0.1μF capacitors for the charge pump operation. Verify that the logic-level READY output requirement is met for monitoring charge pump status. This device is suitable where space-saving surface-mount packages are preferred over larger alternatives.

Part Context

This component belongs to the MAX3224E through MAX3245E family of RS-232 transceivers. While sharing the core AutoShutdown Plus architecture and ESD protection features, the MAX3227E specifically provides one driver and one receiver. Other family members offer different channel counts or lower guaranteed data rates, such as the 250kbps variants.

Replacement Considerations

Public confirmed substitute part numbers: MAX3227CAE+, MAX3227EAE+T, MAX3227EEAE/V+T, MAX3227EEUE+. Verify pinout compatibility and thermal resistance specifications when transitioning between SSOP and TSSOP packages.

FAQ

How does the AutoShutdown Plus feature determine when to enter low-power mode?

The device enters shutdown mode if no valid signal transition is detected on any receiver or transmitter input for more than 30 seconds. It wakes up upon sensing a valid transition at any input.

What is the function of the READY output pin?

The READY output asserts high when the internal charge pumps are regulating and the device is ready to begin transmitting. It goes low when the charge pumps are disabled in shutdown mode.

What level of ESD protection does the MAX3227E provide?

All transmitter outputs and receiver inputs are protected to ±15kV using IEC 1000-4-2 Air-Gap Discharge, ±8kV using IEC 1000-4-2 Contact Discharge, and ±15kV using the Human Body Model.