AD232AN

Overview

The AD232AN is a dual transmitter and receiver RS-232 interface integrated circuit manufactured by Analog Devices. It operates from a single 5 V power supply and utilizes an on-chip charge pump with small external capacitors to generate the required bipolar voltage levels for RS-232 communication. The device supports transmission rates up to 200 kb/s and meets EIA-232-E and V.28 specifications. It features two drivers and two receivers, providing full-duplex communication capabilities in a 16-lead DIP package.

Feature Summary

• Single 5 V power supply operation
• On-chip charge pump for bipolar level generation
• High-speed data transmission up to 200 kb/s
• Compliance with EIA-232-E and V.28 standards

Applications

• Computer serial port interfaces
• Peripheral device connectivity
• Modem communication links
• Printer interface connections
• Instrumentation control systems

Procurement Notes

Verify the specific manufacturer source, as Analog Devices has acquired Maxim Integrated, and parts may be sourced under either brand name. Confirm that the component matches the original ADI specification rather than a legacy Maxim version if strict adherence to Analog Devices manufacturing processes is required. Check for RoHS compliance status depending on the production batch date.

Selection Notes

Select this component when a pin-compatible upgrade to older ADM232 or ADM232L devices is needed. It is suitable for applications requiring high-speed RS-232 communication over short distances without the need for external DC-DC converters. Ensure the design accommodates the small 0.1 µF charge pump capacitors required for proper voltage generation.

Part Context

The AD232AN belongs to the ADM222/ADM232A/ADM242 family of high-speed CMOS RS-232 drivers and receivers. This family is designed to replace older, slower RS-232 transceivers while maintaining pin compatibility with industry-standard parts like the MAX232 series. The 'AN' suffix typically denotes a 16-lead plastic DIP package.

Replacement Considerations

The ADM232AARW and ADM232AANZ are direct functional equivalents within the same product family. These alternatives offer identical electrical characteristics but differ in packaging (surface mount vs. through-hole) or reel configuration. Verify package dimensions and lead pitch before substitution.