MAX234CPE

Overview

The MAX234CPE is a +5V-powered, multichannel RS-232 driver/receiver from the Analog Devices/Maxim Integrated MAX220–MAX249 family. It operates on a single +5V supply and utilizes an integrated charge pump to generate ±10V internal voltages for RS-232 signaling. The device features four drivers and zero receivers in a 16-pin PDIP package. Electrical characteristics include a typical data rate of 120 kbps, a transmitter output voltage swing of ±7.5V under load, and a receiver input operating range of ±25V. The component supports an industrial temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external bipolar power supplies.
• Enables single-supply operation using only a +5V source.
• Provides full RS-232 signal level translation between TTL/CMOS logic and serial interfaces.

Applications

• Interface translation for EIA/TIA-232E communications
• Multidrop RS-232 networks
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix 'CPE' against current manufacturer documentation to confirm the PDIP package and commercial temperature rating. Confirm RoHS compliance status as older Maxim Integrated parts may vary. Check for active obsolescence notices or last-time-buy dates before finalizing procurement plans.

Selection Notes

Select this part when designing systems requiring four independent RS-232 transmitters without receiving capabilities. Ensure the application strictly uses a +5V supply rail. Verify that the required data rates do not exceed the specified 120 kbps limit and that board space allows for the necessary external capacitors for the charge pump.

Part Context

This component belongs to the MAX220–MAX249 series of line drivers and receivers designed for applications where ±12V supplies are unavailable. The MAX234 variant specifically provides a quad-driver configuration within the broader family that includes dual and octal options with varying receiver counts.

Replacement Considerations

Public confirmed substitute part numbers: None identified in verified sources.