ADM238LARZ-REEL

Overview

The ADM238LARZ-REEL is a CMOS RS-232 transceiver from Analog Devices, designed for EIA-232-E and V.28 communication interfaces using a single 5 V power supply. It integrates four drivers and four receivers within a 24-pin SOIC package. The device utilizes internal charge pumps to generate ±10 V supplies from the 5 V input, requiring only four 1 µF external capacitors. It supports data rates up to 120 kbps with an output voltage swing of ±9 V under typical loading. The component operates across commercial (0°C to +70°C) and industrial (-40°C to +85°C) temperature ranges.

Feature Summary

• Integrates dual charge pump converters to enable operation from a single 5 V supply without external high-voltage sources.
• Features Schmitt trigger inputs on all receiver channels to provide noise immunity and error-free reception in noisy environments.
• Includes internal pull-up resistors on transmitter inputs and pull-down resistors on receiver inputs to define logic states when unconnected.

Applications

• Computer peripheral connections
• Modem interface circuits
• Printer port implementations
• Industrial instrument communication

Procurement Notes

Verify that the ordering suffix 'ARZ' corresponds to the specific temperature grade and lead-free packaging requirements for your design. Confirm the '-REEL' designation matches your automated assembly equipment specifications. Ensure the selected variant aligns with the required operating temperature range for the target application environment.

Selection Notes

Select this component when a quad driver/receiver configuration is required alongside low component count due to integrated charge pumps. It is suitable for designs where space is limited but multiple serial ports are needed. Consider alternatives if a shutdown mode or higher data rates are necessary, as this specific part lacks those features.

Part Context

This part belongs to the ADM2xxL family of low-power RS-232 transceivers. It serves as an enhanced upgrade to the older AD2xx series, offering lower power consumption and faster slew rates while maintaining compatibility with standard RS-232 signaling levels.

Replacement Considerations

The ADM238JRZ is a pin-compatible alternative within the same family. Verify that the temperature rating and package tolerance of the substitute match the original design constraints before implementation.