MAX3221ECAE+

Overview

The MAX3221ECAE+ is a single-driver, single-receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a +3.0V to +5.5V supply and supports data rates up to 250kbps. The device features an AutoShutdown function that reduces supply current to 1µA when no valid signal is detected. It includes ±15kV ESD protection on all I/O pins and utilizes a dual charge pump requiring four 0.1µF capacitors for operation. The component is housed in a 16-pin SSOP package and functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• AutoShutdown technology enables ultra-low power consumption by automatically disabling the charge pump and drivers when the RS-232 cable is disconnected or peripheral transmitters are off.
• Integrated dual charge pumps generate true RS-232 voltage levels directly from low-voltage supplies without external transformers.
• Robust electrostatic discharge protection ensures reliability against high-voltage static events across all transmitter outputs and receiver inputs.

Applications

• Notebook, subnotebook, and palmtop computers
• Battery-powered handheld equipment and peripherals
• Cellular phones and portable communication devices

Procurement Notes

Verify the specific ordering suffix 'CAE+' corresponds to the required 16-SSOP package and the 0°C to +70°C commercial temperature range. Confirm that the component meets RoHS compliance standards as indicated by the '+' designation. Ensure the source documentation matches the manufacturer's official specifications for this exact part number before finalizing procurement.

Selection Notes

Select the MAX3221ECAE+ for applications requiring minimal board space due to its single driver and receiver configuration. This model is appropriate for systems operating between +3.0V and +5.5V where low standby power is critical. Verify that the required data rate does not exceed 250kbps and that the commercial temperature range aligns with the system environment.

Part Context

This component belongs to the MAX3221E/MAX3223E/MAX3243E family of RS-232 transceivers. While sharing core technologies like AutoShutdown and ESD protection, the MAX3221E is distinguished by its single-channel architecture. Other family members offer increased channel counts, such as two drivers/receivers in the MAX3223E or three drivers/five receivers in the MAX3243E.

Replacement Considerations

Public confirmed substitute part numbers: MAX3221EEAE+