ADM232AARNZ

Overview

The ADM232AARNZ is a high-speed, single-supply CMOS RS-232 transceiver manufactured by Analog Devices. It integrates two drivers and two receivers capable of transmission rates up to 200 kB/s. The device operates from a single +5 V power supply (4.5 V to 5.5 V) with a typical quiescent current of 8 mA. It utilizes an internal charge pump requiring four external 0.1 µF capacitors to generate the necessary bipolar voltage levels for RS-232 communication. The component meets EIA-232-E and V.28 specifications, featuring ±9 V output swings and Schmitt trigger inputs on the receivers. It is housed in a 16-lead SOIC package and supports an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates dual drivers and dual receivers within a single CMOS package
• Utilizes an internal DC-to-DC converter to generate required RS-232 voltages
• Features Schmitt trigger inputs to ensure noise immunity
• Includes internal pull-up resistors on transmitter inputs

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify that the ordering suffix matches the desired package type, as the 'ARNZ' designation specifically indicates the narrow-body 16-lead SOIC format. Confirm RoHS compliance status through official documentation if lead-free requirements are mandatory. Ensure the application circuit includes the specified four 0.1 µF capacitors for the charge pump to function correctly according to the datasheet guidelines.

Selection Notes

Select this component when a standard RS-232 interface is required without shutdown or enable control features. The ADM232A lacks the SHDN pin found in the ADM222 and the EN/SHDN pins in the ADM242. It serves as a direct upgrade for legacy AD232 designs. Verify that the system does not require bus sharing capabilities, which necessitate the receiver enable functions available in other members of the family.

Part Context

This part belongs to the ADM222/ADM232A/ADM242 family of high-speed RS-232 drivers and receivers. It is designed as a pin-compatible replacement for older MAX232/MAX222 devices. Unlike the ADM222, it does not offer a shutdown mode, and unlike the ADM242, it lacks separate enable controls. It represents the baseline configuration for dual-channel RS-232 communication within this specific product line.

Replacement Considerations

The ADM232AANZ is the DIP package equivalent. The ADM232AARWZ offers a wide-body SOIC option.