AD234AN

Overview

The AD234AN is a five-volt powered CMOS RS-232 driver and receiver manufactured by Analog Devices Inc. It provides two drivers and two receivers, enabling full duplex communication or half-duplex operation. The device integrates charge pumps that eliminate the need for external capacitors when operating from a single five-volt supply. It features low power consumption and is designed to meet EIA/TIA-232-F interface standards.

Feature Summary

• Integrated charge pump circuitry eliminates requirement for external flying capacitors
• CMOS technology ensures low power consumption during operation
• Supports data rates up to 120 kbps
• Single five-volt supply operation capability

Applications

• Industrial control systems requiring serial communication
• Modem interface circuits
• Point-of-sale terminals
• Medical instrumentation with serial data links

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment upon receipt. Check for obsolescence status as older CMOS RS-232 components may have limited production runs. Ensure storage conditions comply with moisture sensitivity levels if applicable.

Selection Notes

Select this component for applications requiring robust RS-232 signaling with minimal external passive components. Consider thermal performance within the specified operating temperature range. Evaluate board space constraints regarding the DIP-16 package format. Verify voltage compatibility with the host microcontroller or processor logic levels.

Part Context

This part belongs to the Analog Devices ADM2xx series of RS-232 transceivers. It serves as a legacy solution for serial communication interfaces in embedded systems. The device complements higher-speed digital isolators and modern USB-to-serial converters in mixed-signal designs.

Replacement Considerations

Direct replacements include ADM202, ADM203, and ADM204 variants which share similar functional characteristics. Verify pin compatibility and electrical specifications before substitution. Alternative manufacturers offer comparable CMOS RS-232 transceivers but require careful validation of timing parameters.