ADM238LJRZ

Overview

The ADM238LJRZ is a CMOS RS-232 line transceiver from Analog Devices, designed for EIA-232-E and V.28 communication interfaces. It integrates four drivers and four receivers, operating on a single +5 V power supply (4.5 V to 5.5 V). The device achieves a data rate of 120 kbps using internal charge pumps that generate ±10 V levels with only four 1 µF external capacitors. It features Schmitt trigger inputs with 0.65 V hysteresis, ±30 V receiver input protection, and outputs capable of ±9 V swing under load.

Feature Summary

• Integrates dual charge pump converters to generate required RS-232 voltage levels from a single 5 V supply
• Provides full duplex communication through four independent drivers and four receivers
• Includes Schmitt trigger inputs with defined hysteresis to ensure noise immunity
• Features internal pull-up and pull-down resistors on all driver and receiver inputs

Applications

• Computer serial port interfaces
• Peripheral equipment connections
• Modem and printer links
• Instrumentation control systems

Procurement Notes

Verify the specific suffix 'J' indicates the commercial temperature range (0°C to 70°C) as per the datasheet revision history. Confirm the package type matches the WSOIC-24 outline dimensions provided in the official documentation. Ensure ordering details align with the manufacturer's current production status.

Selection Notes

Select this component when four channels are required within a single package. It is suitable for designs constrained by board space due to the use of small 1 µF capacitors. Verify that the application does not require low power shutdown functionality, as this model lacks an SD pin compared to the ADM236L.

Part Context

This part belongs to the ADM2xxL family, which serves as an enhanced upgrade to the AD2xx series. It offers lower power consumption and faster slew rates while maintaining compatibility with standard RS-232 specifications. The L designation indicates the capability to operate with smaller external capacitors than previous generations.

Replacement Considerations

The ADM238L is functionally compatible with the AD238JR. However, verify that the replacement supports the required temperature range and packaging style.