ADM237LJR-REEL

Overview

The ADM237LJR-REEL 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, requiring only four 1 µF external capacitors. The device features five drivers and three receivers with full duplex operation at data rates up to 120 kbps. It operates within a temperature range of -40°C to +85°C and is housed in a 24-pin SOIC package.

Feature Summary

• Integrates dual on-board DC-to-DC voltage converters for single-supply operation
• Includes Schmitt trigger inputs with hysteresis for noise immunity
• Features internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs
• Provides ±30 V protection on receiver input pins

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify that the ordering suffix 'REEL' corresponds to tape-and-reel packaging rather than tube packaging when sourcing components. Confirm the specific temperature grade (J or A) matches the required operating environment, as the base part number may denote different thermal ranges depending on the manufacturer's current designation standards.

Selection Notes

Select this component when a high driver count is required alongside multiple receivers in a single package. It is suitable for applications needing robust noise rejection due to built-in hysteresis. Ensure the design accommodates the necessary external 1 µF capacitors for the internal charge pumps and verify that the 120 kbps speed meets the system requirements.

Part Context

This part belongs to the ADM2xxL enhanced upgrade series, which improves upon the legacy AD2xx family by offering lower power consumption, faster slew rates, and compatibility with smaller 1 µF capacitors. The ADM237L specifically provides a 5-driver/3-receiver configuration within a 24-pin footprint, distinguishing it from other members like the ADM236L which includes shutdown control.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.