MAX234EPE

Overview

The MAX234EPE is a dual-channel RS-232 driver and receiver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates from a single +5V supply, utilizing internal charge-pump circuitry to generate the required ±10V voltages for EIA/TIA-232E communication interfaces without external bipolar supplies. The device features a 16-pin Plastic DIP package with an industrial operating temperature range of -40°C to +85°C. Electrical specifications include a typical data rate of 120kbps, transmitter output voltage swings of ±7.5V under load, and receiver input voltage tolerance up to ±30V.

Feature Summary

• Integrated charge-pump DC-DC converters eliminate the need for external capacitors or bipolar power supplies
• Single +5V supply operation simplifies system design and reduces component count
• Receiver inputs tolerate signals up to ±30V, providing protection against high-voltage transients

Applications

• Interface translation between TTL/CMOS logic and RS-232 serial ports
• Multidrop RS-232 network connections
• Portable diagnostic equipment requiring low-power serial communication

Procurement Notes

Verify the specific suffix 'E' confirms the extended temperature rating (-40°C to +85°C) and 'P' indicates the 16-pin PDIP package format. Confirm RoHS compliance status through official manufacturer documentation as historical batches may vary. Ensure the source document matches the exact part number to avoid confusion with similar family members like the MAX232 or MAX233.

Selection Notes

Select this component when designing systems that require isolated RS-232 signaling powered solely by a standard +5V rail. The internal charge pump architecture is suitable for applications where board space is limited compared to discrete solutions. Verify that the 120kbps data rate meets the requirements of the target serial interface protocol before finalizing the design.

Part Context

This component belongs to the MAX220–MAX249 family of +5V-powered multichannel RS-232 drivers and receivers. The family offers various channel configurations and control options across different packages. The MAX234 specifically provides two drivers and two receivers in a compact form factor, serving as a core interface solution for legacy serial communication standards.

Replacement Considerations

Public confirmed substitute part numbers: None identified.