MAX3222CAP+

Overview

The MAX3222CAP+ is a true RS-232 transceiver manufactured by Analog Devices Inc./Maxim Integrated, housed in a 20-pin SSOP 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 shutdown mode with a typical supply current of 1µA and functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar ±12V supplies
• Shutdown mode reduces power consumption to extend battery life
• Compatible with industry-standard MAX242 pinout and functionality

Applications

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

Procurement Notes

Verify the specific suffix CAP+ indicates the 20-pin SSOP package and commercial temperature range (0°C to +70°C). Confirm lead-free status (+) matches project requirements. Ensure ordering documentation references the correct Analog Devices/Maxim Integrated part number to avoid confusion with similar variants.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 ports using a single low-voltage supply. It serves as a direct replacement for legacy MAX232 designs without requiring negative voltage generation. Consider the 20-pin SSOP footprint for space-constrained PCB layouts requiring surface-mount assembly.

Part Context

This device belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. While other members like the MAX3237 support higher MegaBaud speeds or additional channels, the MAX3222 focuses on standard 2-driver/2-receiver configurations optimized for general-purpose serial communication applications.

Replacement Considerations

Public confirmed substitute part numbers include MAX3222CUP+ (TSSOP variant) and MAX3222EAP+ (-40°C to +85°C temperature grade). Verify package dimensions and thermal characteristics when substituting between SSOP and TSSOP formats.