ADM237LARZ

Overview

The ADM237LARZ is a CMOS RS-232 transceiver from Analog Devices, designed for EIA-232-E and V.28 communications interfaces using a single 5 V power supply. It integrates two internal charge pump voltage converters to generate the required ±10 V levels from the 5 V input. The device features five drivers and three receivers, supporting full-duplex communication at data rates up to 120 kbps. It operates within a temperature range of -40°C to +85°C and utilizes a 24-pin SOIC package.

Feature Summary

• Integrates on-board dc-to-dc converters to operate from a single 5 V supply
• Includes five drivers and three receivers for comprehensive interface capability
• Features Schmitt trigger inputs with hysteresis for noise immunity
• Complies with EIA-232-E and V.28 specifications

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the specific ordering suffix 'R' corresponds to the SOIC-24 package variant when sourcing. Confirm that the component lacks low-power shutdown functionality, as this feature is reserved for other members of the ADM2xxL family such as the ADM236L. Ensure compatibility with standard 5 V logic levels before integration into the design.

Selection Notes

Select the ADM237LARZ when five transmitter channels and three receiver channels are required in a single package. This part is suitable for applications needing high driver density without the need for shutdown control. Verify that the absence of an enable pin does not conflict with system bus sharing requirements.

Part Context

The ADM237LARZ belongs to the ADM2xxL family of line drivers/receivers, which serves as an enhanced upgrade to the AD2xx series. This family focuses on lower power consumption and faster slew rates while allowing operation with smaller external capacitors. The L-series designation indicates optimized performance for 5 V systems.

Replacement Considerations

Public confirmed substitute part numbers: MAX237CNG+, MAX237ENG+.