MAX3222EUP/V+

Overview

The MAX3222EUP/V+ is a true RS-232 transceiver from Analog Devices/Maxim Integrated, operating on a single 3.0V to 5.5V supply. It features two drivers and two receivers with full-duplex communication capability. The device utilizes an internal dual charge pump requiring only four 0.1µF external capacitors. It guarantees data rates up to 120kbps under worst-case loads, with typical operation reaching 235kbps. 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 eliminates the need for bipolar ±12V supplies
• Low-power shutdown mode reduces supply current to less than 1µA while keeping receivers active
• Compatible with industry-standard MAX232 pinouts and functionality

Applications

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

Procurement Notes

Verify the specific suffix 'V+' against official manufacturer documentation to confirm lead-free status and tape-and-reel packaging configuration. Ensure the ordering code matches the required temperature grade and package type before finalizing procurement orders.

Selection Notes

Select this component when interfacing TTL or CMOS logic with RS-232 ports in space-constrained designs. It serves as a direct drop-in replacement for legacy MAX232 circuits while offering improved power efficiency and single-supply operation capabilities.

Part Context

This part belongs to the MAX3222 family of low-power RS-232 transceivers. It shares functional compatibility with the MAX232 but operates efficiently from a single voltage source. The E suffix indicates the extended industrial temperature range variant.

Replacement Considerations

MAX232 (legacy equivalent)

FAQ

What is the maximum guaranteed data rate?

The MAX3222 guarantees a data rate of 120kbps with worst-case loads of 3kΩ in parallel with 1000pF.

How does the shutdown mode function?

When the SHDN pin is pulled low, the supply current drops below 1µA, the charge pumps turn off, and transmitter outputs enter a high-impedance state, though receivers remain active.