MAX3226ECUE+T

Overview

The MAX3226ECUE+T is a single-driver, single-receiver RS-232 transceiver from Analog Devices/Maxim Integrated. It operates on a +3.0V to +5.5V supply and guarantees a data rate of 250kbps. The device features AutoShutdown Plus technology, achieving a typical supply current of 1μA when inactive. It includes ±15kV ESD protection on all I/O pins and utilizes a dual charge pump requiring only four 0.1μF capacitors. The component is housed in a 16-pin TSSOP package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• AutoShutdown Plus functionality automatically reduces power consumption by disabling the internal charge pumps during periods of inactivity.
• Integrated dual charge pump generates required RS-232 voltage levels using minimal external capacitance.
• Robust electrostatic discharge protection ensures signal integrity across transmitter outputs and receiver inputs.

Applications

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

Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature range (-40°C to +85°C) and 'U' indicates the TSSOP package type. Confirm the '+' suffix denotes lead-free and RoHS compliance status as per manufacturer specifications. Ensure the source documentation matches the exact part number for accurate electrical parameter validation.

Selection Notes

Select this component for applications requiring a single channel with low standby power consumption. The 250kbps data rate suits standard serial communication needs. Verify that the system design accommodates the four external capacitors required for the charge pump operation within the specified voltage range.

Part Context

This device belongs to the MAX3224E/MAX3225E/MAX3226E/MAX3227E family of RS-232 transceivers. It shares core architectural features such as the AutoShutdown Plus circuitry and ESD protection ratings with sibling models like the MAX3224E and MAX3225E, differing primarily in driver/receiver count and maximum guaranteed data rates.

Replacement Considerations

MAX3226EEUE+T: Identical functional specifications with the same 16-TSSOP package and extended temperature rating.

FAQ

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

The device enters shutdown mode when no valid signal transition is detected on any receiver or transmitter input for more than 30 seconds.

What is the function 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.

Can unused transmitter inputs be left floating?

No, unused transmitter inputs should be connected to GND or VCC, as they do not have internal pullup resistors.