MAX3232CPE+

Overview

The MAX3232CPE+ is a low-power, true RS-232 transceiver manufactured by Analog Devices / 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 external 0.1µF capacitors to generate the necessary ±5.5V levels. It guarantees data rates up to 120kbps with worst-case loads and typically supports 235kbps. The component meets EIA/TIA-232-F standards and includes receiver inputs protected against ±25V signals. It is housed in a 16-pin Plastic DIP package and operates within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrated dual charge pump eliminates the need for bipolar power supplies
• Compatible with standard TTL/CMOS logic levels at various supply voltages
• Receiver inputs withstand ±25V overvoltage conditions

Applications

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

Procurement Notes

Verify that the ordering suffix 'CPE+' corresponds to the specific 16-pin Plastic DIP package and the 0°C to +70°C commercial operating temperature range. Confirm the presence of the '+' designation indicates lead-free compliance as per manufacturer specifications. Ensure the component matches the exact pinout and electrical characteristics defined in the official datasheet before integration.

Selection Notes

Select this component when interfacing microcontrollers or logic circuits with RS-232 ports using a single voltage source between 3.0V and 5.5V. It serves as a direct replacement for legacy MAX232 designs while offering improved performance at lower supply voltages. Consider the 16-pin DIP package for through-hole prototyping or applications requiring specific mechanical mounting constraints.

Part Context

This part belongs to the MAX3222/MAX3232/MAX3237/MAX3241 family of low-power RS-232 transceivers. The MAX3232 variant specifically provides two drivers and two receivers, distinguishing it from higher-channel models like the MAX3241. It maintains functional compatibility with industry-standard MAX232 devices, facilitating straightforward upgrades in existing hardware designs.

Replacement Considerations

The MAX3232CSE+ offers the same functionality in a Narrow SOIC package. For industrial temperature ranges (-40°C to +85°C), consider the MAX3232EPE+ (DIP) or MAX3232ESE+ (Narrow SO). Verify that any substitute maintains the required 120kbps guaranteed data rate and 16-pin configuration.