MAX231CWE+

Overview

The MAX231CWE+ is a +5V-powered, multichannel RS-232 driver and receiver manufactured by Analog Devices Inc. (Maxim Integrated). It operates within the MAX220–MAX249 family and features an integrated charge pump circuitry that eliminates the need for external bipolar ±12V supplies, enabling single-supply operation from a +5V source. The device includes two drivers and two receivers with data rates up to 200 kbps. It utilizes four external capacitors (typically 0.1µF) for the charge pump. The component is housed in a 16-pin Wide SOIC package and supports an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry enables single +5V supply operation without requiring external bipolar voltage sources.
• Provides dual RS-232 drivers and dual receivers for standard EIA/TIA-232E communication interfaces.
• Designed for applications where printed circuit board space is critical due to compact integration.

Applications

• Interface translation between TTL/CMOS logic levels and RS-232 standards
• Multidrop RS-232 network connections
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix 'CWE+' against the manufacturer's current ordering information to confirm the package type, temperature grade, and lead-free status. Confirm availability through authorized distributors as product lifecycles may change. Ensure the external capacitor values match the datasheet recommendations for reliable charge pump performance.

Selection Notes

Select this component when designing systems requiring RS-232 communication powered solely by a +5V rail. It is suitable for space-constrained designs due to its integrated charge pump. Compare against other family members like the MAX232 or MAX243 if different channel counts or shutdown features are required. Verify that the 0°C to +70°C commercial temperature range meets the environmental requirements of the target application.

Part Context

The MAX231CWE+ belongs to the Maxim Integrated MAX220–MAX249 family of +5V-powered RS-232 transceivers. This family is widely used for serial communication interfaces where generating internal high voltages from a single low-voltage supply is necessary. The 'C' suffix indicates the commercial temperature range, while 'WE' denotes the 16-pin Wide SOIC package.

Replacement Considerations

Direct pin-compatible replacements within the same family include the MAX232CWE+ and MAX233CWE+. Verify functional equivalence regarding channel count and control pins before substitution.