ADM232AARN-REEL

Overview

The ADM232AARN-REEL is a high-speed RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single 5 V power supply and supports transmission rates up to 200 kB/s. The device integrates two drivers and two receivers within a 16-lead Standard Small Outline Package (R-16). Internal charge pump circuitry generates the required bipolar voltage levels using four external 0.1 µF capacitors. It meets EIA-232-E and V.28 specifications, features Schmitt trigger inputs for noise immunity, and includes internal pull-up and pull-down resistors on unused pins.

Feature Summary

• Integrates an on-board DC-DC converter utilizing small external capacitors to generate RS-232 voltage levels from a single 5 V supply.
• Features Schmitt trigger inputs on receivers to ensure error-free reception of noisy signals or slow transition times.
• Includes internal pull-up resistors on TTL/CMOS transmitter inputs and pull-down resistors on RS-232 receiver inputs.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify that the ordering suffix 'REEL' corresponds to the specific tape-and-reel packaging configuration required for automated assembly processes. Confirm the package option R-16 matches the footprint constraints of the target printed circuit board design before finalizing procurement orders.

Selection Notes

Select this component when a pin-compatible upgrade for legacy AD232 or ADM232L designs is required. Ensure the application environment remains within the industrial temperature range of -40°C to +85°C. Verify that the system power architecture provides a stable 5 V rail suitable for driving the internal charge pump circuitry.

Part Context

This part belongs to the ADM222/ADM232A/ADM242 family of high-speed CMOS RS-232 transceivers. While sharing core functionality with the ADM222 and ADM242 variants, the ADM232A specifically lacks the shutdown and enable control pins found in its siblings. It serves as a direct replacement for older AD230 through AD241 derivative families.

Replacement Considerations

The datasheet explicitly states the device is pin compatible with MAX222, MAX232A, and MAX242 equivalents. Designers should verify electrical parameter alignment with these specific Maxim Integrated counterparts during substitution planning.