MAX3222EUP+T

Overview

The MAX3222EUP+T is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +3.0V to +5.5V supply and features two drivers and two receivers for full-duplex communication. The device utilizes an internal dual charge pump requiring only four 0.1µF external capacitors, eliminating the need for bipolar supplies. It guarantees data rates up to 120kbps with worst-case loads of 3kΩ in parallel with 1000pF. The component is housed in a 20-pin TSSOP package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrated dual charge pump circuitry eliminates the requirement for external bipolar voltage supplies.
• Low-power shutdown mode reduces supply current to less than 1µA while keeping receiver inputs active.
• Proprietary low-dropout transmitter output stage ensures true RS-232 performance across the full operating voltage range.

Applications

• Battery-powered equipment
• Hand-held devices
• Peripherals
• Datacom equipment

Procurement Notes

Verify the specific suffix 'E' confirms the -40°C to +85°C industrial temperature rating and 'U' indicates the 20-pin TSSOP package. Confirm '+T' denotes tape-and-reel packaging if required for automated assembly. Ensure compatibility with lead-free manufacturing processes as indicated by the '+' designation.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single low-voltage power source. It serves as a pin-compatible replacement for legacy MAX232 designs but offers improved power efficiency. Verify that the application load does not exceed the guaranteed 120kbps rate under worst-case capacitance conditions.

Part Context

This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. It shares functional similarities with the MAX3232 but differs in package availability and specific thermal characteristics. The E-series designation distinguishes it from commercial grade parts by extending the operational temperature range.

Replacement Considerations

Publicly confirmed substitutes include MAX3222CUP+, MAX3222CAP+, and MAX3222EAP+. These variants maintain identical electrical functionality but differ in temperature ratings or package types such as SSOP.