ADM232LAN

Overview

The ADM232LAN is a CMOS RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single 5 V power supply and meets EIA-232-E and V.28 specifications with a data rate of 120 kbps. The device integrates on-board DC-to-DC converters to generate ±9 V output swings using small 1 µF capacitors. It features two drivers and two receivers, ±30 V receiver input levels, and latch-up-free operation.

Feature Summary

• Integrates internal charge pump voltage converters for single-supply operation
• Includes Schmitt trigger inputs with hysteresis for noise immunity
• Features low power shutdown mode for battery-powered applications

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific suffix 'L' indicates the commercial or industrial temperature range variant required for your design. Confirm package availability matches the target footprint. Ensure external capacitor ratings meet the voltage requirements specified in the datasheet for reliable charge pump performance.

Selection Notes

Select this component when a single 5 V supply is available but RS-232 bipolar levels are needed. It is suitable for space-constrained designs due to the use of small 1 µF capacitors. Consider the ADM233L if no external capacitors are desired, or the ADM236L/ADM241L if low power shutdown functionality is required.

Part Context

The ADM232LAN belongs to the ADM2xxL family of enhanced RS-232 transceivers. This family offers lower power consumption and faster slew rates compared to the legacy AD2xx series. It serves as a direct upgrade for designs requiring robust serial communication interfaces without the need for dual polarity power supplies.

Replacement Considerations

The ADM232A is a compatible alternative within the same product family. Verify pin compatibility and ensure the replacement supports the required data rate and operating temperature range.