ADM232LJN

Overview

The ADM232LJN 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. The device integrates two drivers and two receivers with an internal charge pump that generates ±10 V supplies using external 1 µF capacitors. It supports data rates up to 120 kbps and provides a typical output voltage swing of ±9 V. The component features Schmitt trigger inputs for noise immunity, internal pull-up/pull-down resistors, and latch-up protection.

Feature Summary

• Integrates on-board DC-to-DC converters to generate bipolar RS-232 levels from a single 5 V supply
• Features Schmitt trigger receiver inputs with hysteresis to ensure error-free reception in noisy environments
• Includes internal pull-up and pull-down resistors on input pins to simplify interface design

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific suffix 'JN' against the manufacturer's ordering guide to confirm package type (PDIP) and temperature range (Industrial). Ensure the datasheet revision matches the required specifications. Confirm RoHS compliance status as indicated in the documentation before finalizing procurement.

Selection Notes

Select this component when a single 5 V supply is available and full-duplex communication is required. It is suitable for applications needing standard RS-232 levels without external high-voltage supplies. Consider alternatives if shutdown functionality or higher data rates are necessary, as this model lacks those features.

Part Context

The ADM232LJN belongs to the ADM2xxL family of enhanced CMOS RS-232 transceivers. This family offers lower power consumption and faster slew rates compared to previous generations. It is designed to replace older AD2xx series parts while maintaining pin compatibility and improving performance characteristics.

Replacement Considerations

The ADM232A is a pin-compatible high-speed upgrade offering 200 kbps transmission rates. Verify if the increased speed or different electrical characteristics of the ADM232A are acceptable for the existing design.