MAX3226ECTE+T

Overview

The MAX3226ECTE+T is a single-channel 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 250kbps. The device features AutoShutdown Plus technology, reducing supply current to 1μA when idle. It includes ±15kV ESD protection on all I/O pins and utilizes a dual charge pump requiring four 0.1μF capacitors. The component is housed in a 16-pin TQFN package with an exposed pad (EP) and supports an industrial temperature range of -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 voltage levels from low-voltage supplies using minimal external capacitance.
• Enhanced electrostatic discharge protection ensures robustness against high-voltage static events on transmitter and receiver lines.

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 configuration. Confirm the 'E' designation aligns with the required -40°C to +85°C industrial operating temperature range. Ensure the 'C' package code matches the 16-TQFN-EP footprint requirements for your PCB layout.

Selection Notes

Select this model for applications requiring a single driver and receiver with low standby current. The 250kbps speed suits standard serial communication needs. Consider the TQFN-EP package for thermal management and space-constrained designs compared to SSOP alternatives.

Part Context

This part belongs to the MAX3224E–MAX3227E family of 3V-powered RS-232 transceivers. It shares core features like AutoShutdown Plus and ESD protection with siblings such as the MAX3224E and MAX3225E, differing primarily in channel count and guaranteed data rates.

Replacement Considerations

Public confirmed substitute part numbers: MAX3226EEAE+T, MAX3226ECAP+.

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.

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.

What external components are required for the charge pump operation?

Operation requires four small 0.1μF capacitors connected to the charge pump terminals for generating V+ and V- voltages.