MAX3222ECUP+T

Overview

The MAX3222ECUP+T is a true RS-232 transceiver manufactured by Analog Devices/Maxim Integrated, housed in a 20-pin TSSOP package. It operates on a single +3.0V to +5.5V supply and features two drivers and two receivers for full-duplex communication. The device guarantees data rates up to 250kbps with worst-case loads of 3kΩ parallel to 1000pF. It incorporates an internal dual charge pump requiring only four 0.1μF capacitors. Key electrical parameters include a typical operating supply current of 1mA and a shutdown supply current of 1μA. ESD protection ratings are ±15kV (Human Body Model) and ±8kV (IEC Contact Discharge). The component supports an industrial temperature range of 0°C to +70°C.

Feature Summary

• Integrates a proprietary low-dropout transmitter output stage delivering true RS-232 performance from a single +3.0V to +5.5V supply.
• Features enhanced electrostatic discharge (ESD) protection on all transmitter outputs and receiver inputs to withstand high static events without latchup.
• Includes a shutdown mode that reduces supply current to 1μA while keeping receivers active for external device monitoring.
• Utilizes an internal dual charge pump that requires only four small 0.1μF capacitors for operation.

Applications

• Battery-powered portable equipment
• Cell phones and smart phones
• Notebook, subnotebook, and palmtop computers
• Printers and xDSL modems

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and temperature range. Ensure compatibility with lead-free/RoHS compliance requirements if applicable. Cross-reference the part number with authorized distributors to confirm availability status and authenticity before procurement.

Selection Notes

Select this component when designing space-constrained systems requiring low power consumption and high ESD tolerance. It serves as a direct pin, package, and functional replacement for industry-standard MAX242 devices. Consider the 250kbps data rate limit and the requirement for external 0.1μF capacitors for the charge pump circuit during system design.

Part Context

This device belongs to the MAX3222E/MAX3232E family of +3.0V-powered EIA/TIA-232 communications interfaces. It shares architectural similarities with other Maxim RS-232 transceivers but is distinct in its specific driver/receiver count and package configuration. The ECUP variant specifically denotes the 20-pin TSSOP package within the commercial temperature grade.

Replacement Considerations

The MAX3222E is functionally compatible with the industry-standard MAX242. Verify pinout alignment and voltage levels when substituting older RS-232 interface ICs in existing designs.