ADM236LAN

Overview

The ADM236LAN is a CMOS RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single +5 V power supply, utilizing internal charge pumps to generate the required ±10 V levels for EIA-232-E compliance. The device features four drivers and three receivers, supporting data rates up to 120 kbps. Key electrical parameters include a typical output voltage swing of ±9 V, a shutdown supply current of ≤1 µA, and an input logic threshold low of 0.8 V. It includes a low-power shutdown mode reducing dissipation to less than 5 µW and an active-low enable function for receiver control.

Feature Summary

• Integrates dual charge pump converters to generate internal ±10 V supplies from a single 5 V source
• Features a low-power shutdown mode that significantly reduces quiescent current consumption
• Includes an active-low enable input to place receiver outputs in a high impedance state
• Provides Schmitt trigger inputs on receivers to ensure noise immunity and error-free reception

Applications

• Battery-powered equipment requiring low standby power
• Computers and peripheral interface connections
• Modems and printers with serial communication requirements
• Instruments utilizing EIA-232-E standards

Procurement Notes

Verify the suffix 'AN' corresponds to the specific package type and temperature grade intended for your design. Confirm the revision level matches the target datasheet Rev. C specifications. Ensure ordering documentation aligns with the manufacturer's current lead times and availability status before finalizing procurement plans.

Selection Notes

Select this component when a single 5 V supply is available but RS-232 voltage levels are required. It is suitable for designs needing four transmit channels and three receive channels. Consider the shutdown feature for battery applications. Verify that the 120 kbps data rate meets system requirements and that the 24-pin package fits the PCB layout constraints.

Part Context

The ADM236LAN belongs to the ADM2xxL family of enhanced RS-232 transceivers. This family serves as an upgrade to the older AD2xx series, offering lower power consumption and faster slew rates. The part is designed to replace legacy components while maintaining compatibility with standard EIA-232-E interfaces in space-constrained or low-voltage environments.

Replacement Considerations

The datasheet identifies the ADM236LAN as a plug-in upgrade for the MAX223, MAX230 through MAX241, and AD230 through AD241 families. Verify pinout compatibility and capacitor requirements when substituting these legacy parts.