ADM232AANZ

Overview

The ADM232AANZ is a high-speed, single-supply RS-232 transceiver manufactured by Analog Devices Inc. It operates from a single 5 V power supply and supports data rates up to 200 kB/s. The device integrates two drivers and two receivers within a 16-lead Plastic Dual In-Line (PDIP) package. Internal charge pumps generate the necessary bipolar voltage levels using four external 0.1 µF capacitors. It meets EIA-232-E and V.28 specifications with an operating temperature range of -40°C to +85°C.

Feature Summary

• Integrates internal DC-DC converters to generate required RS-232 voltage swings from a single 5 V supply.
• Features Schmitt trigger inputs on receivers to ensure noise immunity and error-free reception.
• Includes internal pull-up resistors on TTL/CMOS transmitter inputs to simplify unused pin handling.
• Provides full duplex communication capability with dedicated driver and receiver channels.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify that the component matches the specific PDIP-16 package configuration required for through-hole mounting. Confirm the suffix 'NZ' indicates RoHS compliance status as defined in the manufacturer's ordering guide. Ensure the design accommodates the four required 0.1 µF external capacitors for the internal charge pump circuitry.

Selection Notes

Select this model when a standard 16-pin DIP footprint is required for prototyping or low-volume production. It serves as a direct pin-compatible replacement for legacy AD232 and ADM232L devices. Consider alternative packages like SOIC if surface-mount technology is preferred for automated assembly processes.

Part Context

This component belongs to the ADM222/ADM232A/ADM242 family of high-speed CMOS RS-232 drivers and receivers. The ADM232A variant specifically lacks the shutdown and enable control pins found in the ADM222 and ADM242 models. It represents an enhanced upgrade over earlier AD230-AD241 derivatives while maintaining physical compatibility.

Replacement Considerations

The datasheet confirms pin compatibility with MAX222, MAX232A, and MAX242 equivalents. Designers replacing older AD232 or ADM232L parts can utilize this component without modifying the board layout.

FAQ

Does the ADM232AANZ include a shutdown function?

No, the ADM232A does not feature a shutdown (SHDN) pin. This function is available only in the ADM222 and ADM242 variants within the same family.

What is the maximum input voltage the receivers can withstand?

The receivers are protected against overvoltages up to ±30 V on the RS-232 input lines.

How many external capacitors are required for operation?

Four external 0.1 µF capacitors are required to support the internal charge pump voltage converter circuit.