AD238JR

Overview

The AD238JR is a CMOS RS-232 line transceiver manufactured by Analog Devices Inc. It integrates four drivers and four receivers within a single SOIC-24 package, supporting full-duplex communication compliant with EIA-232-C and V.28 standards. The device operates at a maximum data rate of 120 kb/s with a propagation delay of 10 us. It requires a single +5 V power supply and draws 15 mA of operating current. The component functions reliably across an industrial temperature range from 0°C to +70°C.

Feature Summary

• Integrates four independent drivers and four receivers for multi-channel serial communication
• CMOS technology enables low power consumption while maintaining standard RS-232 voltage levels
• Full-duplex operation supports simultaneous transmission and reception on multiple lines

Applications

• Industrial control systems requiring robust serial communication interfaces
• Medical equipment utilizing EIA/TIA-232E compliant data links
• GPS modules and navigation devices needing reliable serial data transfer
• Communication systems integrating microcontrollers with external peripherals

Procurement Notes

Verify the specific manufacturer source when sourcing this component, as Rochester Electronics distributes versions of the AD238JR. Confirm RoHS compliance status prior to integration, as some distributed variants may not meet current environmental directives. Ensure the SOIC-24 package footprint matches the design layout. Cross-reference the datasheet revision to confirm electrical characteristics align with the target application requirements.

Selection Notes

Select the AD238JR for applications requiring four independent RS-232 channels without the need for shutdown modes or ESD protection features. This component is suitable for designs operating strictly within the 0°C to +70°C temperature range. It serves as a direct functional replacement for legacy MAX238 devices in existing schematics. Consider the 120 kb/s data rate limit when designing high-speed serial interfaces.

Part Context

The AD238JR belongs to the broader family of CMOS RS-232 transceivers designed for +5 V powered systems. These components bridge the gap between TTL/CMOS logic levels and RS-232 signal voltages. The series includes variants with different driver/receiver counts and packaging options. The AD238JR specifically addresses the need for multi-port serial connectivity in compact surface-mount designs.

Replacement Considerations

The MAX238CWG+ is a confirmed public substitute offering identical pinout and functional specifications. Both devices provide four drivers and four receivers in a 24-pin package. Verify that the replacement variant meets the same temperature and voltage requirements before finalizing the swap.