MAX234CWE

Overview

The MAX234CWE is a +5V-powered, quad RS-232 driver integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 120kbps. The device features an internal charge pump that eliminates the need for external bipolar supplies, enabling single-supply operation. It is housed in a 16-pin Wide SOIC package and is rated for commercial operating temperatures from 0°C to +70°C.

Feature Summary

• Integrates four independent RS-232 drivers with built-in charge-pump circuitry
• Enables single +5V power supply operation without requiring ±12V rails
• Designed for EIA/TIA-232E and V.28/V.24 communication standards

Applications

• Interface translation between TTL/CMOS logic and RS-232 levels
• Multidrop RS-232 network implementations
• Portable diagnostics equipment requiring serial connectivity

Procurement Notes

Verify the specific suffix 'CWE' against current manufacturer documentation to confirm the exact temperature grade and packaging configuration. Confirm RoHS compliance status as manufacturing processes evolve. Cross-reference the part number with official distributor catalogs to ensure availability and identify any potential obsolescence notices before finalizing procurement plans.

Selection Notes

Select this component when a design requires four independent transmit channels without receiving capabilities. Ensure the application environment remains within the 0°C to +70°C commercial temperature range. Verify that the system power budget accommodates the typical supply current requirements during active transmission states.

Part Context

This device belongs to the MAX220–MAX249 family of line drivers/receivers designed for applications where ±12V supplies are unavailable. While similar to the dual-channel MAX232, the MAX234 provides four drivers for expanded serial connectivity. It shares the same fundamental architecture and pinout compatibility characteristics common to the series.

Replacement Considerations

Direct replacements include other members of the MAX220-MAX249 family such as the MAX232 or MAX233, provided the channel count and temperature specifications align with the design requirements.