ADM232AARWZ

Overview

The ADM232AARWZ is a high-speed RS-232 line driver and receiver manufactured by Analog Devices Inc. It operates from a single +5 V power supply and utilizes an internal charge pump to generate the required bipolar voltage levels for RS-232 communication. The device features two drivers and two receivers, supporting transmission rates up to 200 kB/s. It meets all EIA-232-E and V.28 specifications, providing ±9 V output swing with a 5 V supply and accepting input levels up to ±30 V. The component is housed in a 16-lead wide body Small Outline Package (SOIC) and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates on-board DC-DC converters using small external capacitors to generate RS-232 bipolar levels from a single 5 V supply.
• Provides full duplex communication with two independent drivers and two receivers on a single chip.
• Features Schmitt trigger inputs on receivers to ensure noise immunity and error-free reception.
• Pin-compatible with legacy MAX222/MAX232A/MAX242 devices for easy upgrades.

Applications

• Computers
• Peripherals
• Modems
• Printers
• Instruments

Procurement Notes

Verify the package type matches the design requirements, as the 'W' suffix indicates a wide body SOIC. Confirm RoHS compliance status if environmental regulations apply to the final assembly. Ensure the ordering suffix corresponds to the specific tape and reel or tube packaging needed for the manufacturing process.

Selection Notes

Select this component when a pin-compatible upgrade from older ADI or Maxim RS-232 transceivers is required. It is suitable for applications needing high-speed data transmission up to 200 kB/s without the complexity of dual power supplies. Consider the ADM222 or ADM242 variants if shutdown or enable control functions are necessary for power management.

Part Context

The ADM232AARWZ belongs to the ADM222/ADM232A/ADM242 family of high-speed CMOS RS-232 drivers and receivers. This series represents an enhancement over the earlier AD230-AD241 family, offering improved performance while maintaining plug-in compatibility. The family shares common architectural features but differs in control pin configurations and lead counts.

Replacement Considerations

Public confirmed substitute part numbers include ADM232AARNZ and ADM232AARW. These parts share identical electrical characteristics and pinouts, differing primarily in package dimensions or packaging format.

FAQ

Does the ADM232AARWZ include a shutdown function?

No, the ADM232AARWZ does not have a shutdown (SHDN) pin. Shutdown functionality is available in the ADM222 and ADM242 variants within the same family.

What is the maximum input voltage the receivers can tolerate?

The receivers can accept RS-232 signal levels up to ±30 V, protecting the internal circuitry from overvoltage conditions.

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.