ADM241LARSZ

Overview

The ADM241LARSZ is a CMOS RS-232 transceiver from Analog Devices, operating on a single 5 V supply. It integrates four drivers and five receivers within a 28-pin SOIC package. The device supports data rates up to 120 kbps with an output voltage swing of ±9 V. Internal charge pumps generate the required ±10 V levels using external 1 µF capacitors. Key features include a low power shutdown mode drawing ≤1 µA and an enable input for receiver control. It meets EIA-232-E specifications and operates across industrial temperatures from -40°C to +85°C.

Feature Summary

• Integrates internal DC-to-DC converters to operate from a single 5 V supply without requiring external ±12 V rails.
• Features a low power shutdown mode that reduces current consumption to less than 1 µA for battery applications.
• Includes an active-low enable input to place receiver outputs in a high impedance state for bus sharing.

Applications

• Battery-powered computers and portable equipment
• Industrial instruments and measurement devices
• Modems and peripheral interfaces

Procurement Notes

Verify the suffix ARSZ corresponds to the Industrial temperature range (-40°C to +85°C) and SSOP or SOIC packaging as specified in the ordering guide. Confirm RoHS compliance status through official manufacturer documentation before procurement.

Selection Notes

Select this component when a single 5 V supply is available but RS-232 voltage levels are required. The ADM241L is suitable for designs needing multiple receiver inputs (five) and driver outputs (four). Ensure the application benefits from the low power shutdown capability for extended battery life.

Part Context

The ADM241L belongs to the ADM2xxL family of enhanced CMOS RS-232 drivers and receivers. This series improves upon the older AD2xx family by offering lower power consumption, faster slew rates, and compatibility with smaller 1 µF capacitors. It serves as a direct upgrade for legacy designs requiring reduced board space and power.

Replacement Considerations

The MAX241CWI+T is a functional equivalent offering similar 5 V operation and pinout compatibility. Verify specific parameter differences such as propagation delay and shutdown current characteristics between the Analog Devices and Maxim Integrated versions.