MAX3222EAP+T

Overview

The MAX3222EAP+T is a true RS-232 transceiver from Analog Devices/Maxim Integrated, featuring two drivers and two receivers in a 20-pin SSOP package. It operates on a single 3.0V to 5.5V supply with an internal dual charge pump requiring only four 0.1µF capacitors. The device guarantees data rates up to 120kbps at worst-case loads (3kΩ || 1000pF) and typically supports 235kbps. Operating temperature range is -40°C to +85°C. Key electrical parameters include a typical supply current of 1mA, shutdown current below 1µA, and receiver input hysteresis of 0.3V.

Feature Summary

• Integrated dual charge pump eliminates the need for external bipolar ±12V supplies
• Low-power shutdown mode reduces supply current to less than 1µA while keeping receivers active
• Compatible with industry-standard MAX232 pinout and functionality

Applications

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

Procurement Notes

Verify the 'E' suffix indicates the industrial temperature range (-40°C to +85°C) and the 'AP' suffix denotes the 20-pin SSOP package. Confirm the '+T' suffix corresponds to tape-and-reel packaging if required by assembly processes. Ensure compatibility with existing PCB footprints designed for standard SSOP-20 components.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 standards using a single low-voltage supply. It serves as a drop-in replacement for the MAX232 in designs requiring lower power consumption or operation below 5V. Verify that the application does not require higher data rates exceeding 235kbps, which would necessitate the MAX3237 variant.

Part Context

This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. The MAX3222 specifically provides two drivers and two receivers, distinguishing it from the single-channel MAX3221 and the multi-channel MAX3241. It shares functional compatibility with legacy MAX232 designs while offering improved power efficiency.

Replacement Considerations

The MAX3222CAP+T is a commercial grade (0°C to +70°C) alternative. The MAX3232 series offers identical functionality but lacks receiver outputs.