MAX3226EEUE+

Overview

The MAX3226EEUE+T is a single-channel, full-duplex RS-232 transceiver manufactured by Analog Devices / Maxim Integrated. It operates on a single +3.0V to +5.5V supply and guarantees a data rate of 250kbps. The device incorporates AutoShutdown Plus technology, reducing supply current to 1μA when idle. It features ±15kV ESD protection on all I/O pins and utilizes a dual charge pump with four 0.1μF capacitors for voltage generation. The component is housed in a 16-pin TSSOP package and supports an industrial temperature range from -40°C to +85°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 voltages using only four small external capacitors.
• Robust electrostatic discharge protection rated at ±15kV via air-gap and human body models.

Applications

• Notebook, subnotebook, and palmtop computers
• Cellular phones and battery-powered equipment
• Hand-held devices and peripherals

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging rather than tube packaging. Confirm that the 'E' designation corresponds to the extended industrial temperature range (-40°C to +85°C). Ensure the '+'' suffix confirms lead-free and RoHS compliance status before finalizing procurement orders.

Selection Notes

Select this part for applications requiring a single transmitter and receiver channel within the MAX3226E family. It is suitable for systems needing low standby current through automatic shutdown features. Verify that the 250kbps guaranteed data rate meets the system's communication speed requirements compared to higher-speed variants.

Part Context

This component belongs to the MAX3224E/MAX3225E/MAX3226E/MAX3227E series of RS-232 transceivers. It shares core architectural features such as the AutoShutdown Plus circuitry and dual charge pump design with other members of the family, differing primarily in driver/receiver counts and maximum data rates.

Replacement Considerations

MAX3226EEUE+ (Tube Packaging)

FAQ

How does the AutoShutdown Plus feature function?

It monitors receiver and transmitter inputs; if no valid transitions occur for more than 30 seconds, it shuts down the charge pumps to reduce supply current to 1μA. It reactivates upon detecting a valid signal transition.

What is the purpose of the READY output pin?

The READY output asserts high when the internal charge pumps are regulating and the device has reached sufficient voltage levels to begin transmitting RS-232 signals.