ADM238LJRZ-REEL

Overview

The ADM238LJRZ-REEL is a CMOS RS-232 transceiver from Analog Devices, designed for single 5 V power supply operation. It integrates four drivers and four receivers to support full-duplex communication compliant with EIA-232-E standards. The device utilizes internal charge pumps to generate ±10 V supplies from the 5 V input, requiring only four external 1 µF capacitors. Key electrical parameters include a data rate of 120 kbps, a typical operating supply current of 13 mA, and an output voltage swing of ±9 V under load. It operates within a commercial temperature range of 0°C to +70°C and is housed in a 24-pin SOIC package.

Feature Summary

• Integrates dual charge pump converters to enable RS-232 level shifting using a single 5 V digital supply.
• Features Schmitt trigger inputs on all receiver channels to provide noise immunity and error-free reception.
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs to manage unused pins.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific suffix 'REEL' indicates reel packaging when sourcing. Confirm the 'J' designation corresponds to the commercial temperature range (0°C to +70°C) rather than the industrial grade. Ensure the component matches the 24-pin SOIC outline dimensions specified in the datasheet.

Selection Notes

Select this part when a quad driver and quad receiver configuration is required for RS-232 interfaces. It is suitable for applications where space is limited due to the use of small 1 µF capacitors. Note that unlike the ADM236L, this model lacks a low-power shutdown pin, making it less ideal for battery-powered systems requiring deep sleep modes.

Part Context

The ADM238L belongs to the ADM2xxL family, which serves as an enhanced upgrade to the legacy AD2xx series. This generation offers lower power consumption, faster slew rates, and compatibility with smaller external capacitors. The ADM238L specifically provides a symmetric 4-driver and 4-receiver topology within a 24-pin footprint.

Replacement Considerations

Public confirmed substitute part numbers: ADM238JRZ, AD238JR.