AD234AR

Overview

The AD234AR is a dual RS-232 transceiver manufactured by Analog Devices Inc. Designed for single-supply operation, it integrates charge pumps to generate the necessary positive and negative voltages from a single 5 V source, eliminating the need for external dual supplies. The device features two drivers and two receivers, providing full RS-232 compliance with EIA/TIA-232-F standards. It supports data rates up to 120 kbps and includes shutdown modes for low power consumption.

Feature Summary

• Single 5 V supply operation with integrated charge pump
• Dual drivers and dual receivers for complete RS-232 communication
• Low power shutdown mode capability
• Full compatibility with EIA/TIA-232-F specifications

Applications

• Industrial control systems requiring serial communication
• Portable battery-powered equipment needing simplified power architectures
• Modem interfaces in telecommunications hardware
• Data acquisition systems with RS-232 connectivity requirements

Procurement Notes

Verify the specific suffix 'AR' indicates the standard commercial temperature range and SOIC package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets, as environmental declarations can vary by production batch. Ensure the supplier provides valid traceability for analog components used in critical signal paths.

Selection Notes

Select this component when a design requires isolated RS-232 signaling powered exclusively by a 5 V rail without external inductors or transformers. Compare input/output voltage levels against connected microcontroller logic if level shifting is required. Evaluate thermal performance in enclosed enclosures, as internal charge pumps generate heat during high-duty-cycle transmission.

Part Context

The AD234 belongs to Analog Devices' family of low-power RS-232 transceivers. It serves as a direct replacement for legacy MAX232-type devices but offers improved noise immunity and lower current consumption. The 'AR' designation typically refers to the plastic surface-mount package option suitable for automated assembly processes in consumer and industrial electronics manufacturing.

Replacement Considerations

Direct pin-compatible substitutes include the ADM232 and ADM205 series from Analog Devices, which share similar functional blocks and electrical characteristics. Cross-reference tools may list equivalent parts from other manufacturers, but verify that alternative devices support the same single-supply charge pump architecture and meet identical EIA/TIA-232-F voltage swing requirements.