MAX3222EUP+

Overview

The MAX3222EUP+ is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-pin TSSOP package. It operates from a single +3.0V to +5.5V supply and includes an internal dual charge pump requiring only four 0.1µF external capacitors. The device features two drivers and two receivers with full-duplex communication capability. It guarantees data rates up to 120kbps while maintaining standard RS-232 output levels. The component supports an operating temperature range of -40°C to +85°C and incorporates shutdown functionality to minimize power consumption.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Shutdown mode reduces supply current to less than 1µA
• Compatible with industry-standard MAX232 pinout and functionality

Applications

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

Procurement Notes

Verify the specific suffix 'E' indicates the extended industrial temperature range (-40°C to +85°C) compared to commercial variants. Confirm the '+T' or '+' designation ensures lead-free compliance per RoHS standards. Cross-reference the 20-TSSOP package code U20+2 to ensure physical footprint compatibility with existing PCB layouts before finalizing orders.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 ports under single-supply constraints. The MAX3222EUP+ is suitable for applications requiring low power consumption due to its shutdown feature. Ensure the design accommodates the required four external 0.1µF capacitors for the charge pump circuitry. Verify that the 120kbps guaranteed data rate meets the system's communication speed requirements.

Part Context

This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power, true RS-232 transceivers. It serves as a direct replacement for legacy MAX232 devices but offers improved performance on lower voltage rails. The E-series designation specifically denotes the industrial temperature grade, distinguishing it from the C-series commercial grade components within the same product line.

Replacement Considerations

The MAX3222CUP+ serves as a commercial-grade alternative with a 0°C to +70°C range. The MAX3232 is functionally compatible but lacks receiver outputs.