ADM237LJR

Overview

The ADM237LJR is a CMOS RS-232 transceiver from the ADM2xxL family, designed for EIA-232-E and V.28 interfaces using a single 5 V supply. It integrates two internal charge pump converters to generate ±10 V levels, eliminating the need for external dual supplies. The device features five drivers and three receivers with full duplex operation. Key electrical parameters include a data rate of 120 kbps, an output voltage swing of ±9 V, and a typical operating current of 13 mA. It operates within a temperature range of -40°C to +85°C and utilizes a 24-pin SOIC package.

Feature Summary

• Integrates on-board DC-to-DC converters to operate from a single 5 V power supply
• Provides five drivers and three receivers for complex communication interfaces
• Features Schmitt trigger inputs with hysteresis for noise immunity
• Includes internal pull-up and pull-down resistors on input pins

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific ordering suffix 'JR' against the manufacturer's official documentation to confirm the exact package type and temperature grade. Ensure compatibility with the required PCB footprint for the 24-pin SOIC configuration. Cross-reference the component marking with the datasheet to validate authenticity before integration into production systems.

Selection Notes

Select this component when a system requires multiple transmit lines alongside receive capabilities without access to negative voltage rails. The integrated charge pumps simplify design by reducing external capacitor count. Verify that the 120 kbps speed meets application requirements and that the 24-pin form factor fits the available board space constraints.

Part Context

This part belongs to the ADM236L–ADM241L subset of the ADM2xxL family, characterized by five drivers and three receivers. Unlike the ADM236L, it lacks a shutdown pin, and unlike the ADM238L, it does not provide four receivers. It serves as a specialized interface solution for applications needing asymmetric driver/receiver counts in a compact 24-pin format.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.