MAX3221CAE+TG002

Overview

The MAX3221CAE+TG002 is a single-driver, single-receiver RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +3.0V to +5.5V supply and features an integrated dual charge pump that generates ±5.5V internally, eliminating the need for external ±12V supplies. The device incorporates AutoShutdown technology, reducing supply current to 1µA when no valid signal is detected on receiver inputs for 30µs. It supports data rates up to 235kbps with typical operation at 120kbps under worst-case loads. The component is housed in a 16-pin SSOP package and is rated for commercial operating temperatures ranging from 0°C to +70°C.

Feature Summary

• AutoShutdown functionality reduces power consumption by disabling internal power supplies and drivers during periods of inactivity.
• Integrated dual charge-pump circuitry simplifies system design by generating required RS-32 voltage levels from a single low-voltage supply.
• Provides true RS-232 performance compatibility with standard PC-to-PC communication software.

Applications

• Battery-powered equipment requiring extended operational life
• Hand-held devices and portable diagnostics equipment
• Peripheral connections utilizing serial communication

Procurement Notes

Verify the specific suffix 'TG002' against official manufacturer documentation to confirm tape-and-reel packaging or specific manufacturing lot details. Ensure the ordering part number matches the exact temperature grade and package variant required for the target application environment.

Selection Notes

Select this component for designs requiring minimal external capacitance (0.1µF) at 3.3V operation. Consider the 16-pin SSOP footprint constraints and verify interface logic compatibility with the host microcontroller. Evaluate if the single driver/receiver configuration meets the system's I/O requirements compared to multi-channel alternatives.

Part Context

This component belongs to the MAX3221/MAX3223/MAX3243 family of +3V to +5.5V RS-232 transceivers. The MAX3221 serves as the single-channel version within this series, sharing core technologies like AutoShutdown and UCSP capacitors with its multi-channel counterparts.

Replacement Considerations

Public confirmed substitute part numbers: MAX3221CAE, MAX3221CUE, MAX3221EAE, MAX3221EUE.

FAQ

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

The device enters AutoShutdown mode when it senses no valid signal levels on all receiver inputs for a duration of 30µs, shutting down the on-board power supply and drivers.

What capacitor values are required for 3.3V operation?

For 3.3V operation, the MAX3221 requires 0.1µF capacitors for C1 through C4.

Can the MAX3221 operate directly from a 3.3V supply without external voltage regulators?

Yes, the device operates from a single +3.0V to +5.5V supply and uses an internal charge pump to generate the necessary ±5.5V for RS-232 signaling.