MAX232CEASE+

Overview

The MAX232CEASE+ is a +5V-powered, multichannel RS-232 driver and receiver manufactured by Analog Devices Inc./Maxim Integrated. It operates within a supply voltage range of 4.5V to 5.5V and supports data rates up to 200kbps. The device features two drivers and two receivers for full-duplex communication. It utilizes an internal charge pump circuitry requiring four external capacitors (C1–C4) to generate the necessary ±10V levels from a single +5V source. The component is housed in a 16-pin Narrow SO package and is rated for an industrial operating temperature range of -40°C to +85°C.

Feature Summary

• Integrated charge pump circuitry eliminates the need for bipolar ±12V supplies, enabling single +5V operation.

Applications

• EIA/TIA-232E communications interfaces
• V.28/V.24 communications interfaces

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm exact package dimensions and temperature ratings. Ensure that the required external capacitors are correctly selected and placed according to the datasheet specifications to maintain signal integrity and proper voltage generation.

Selection Notes

Select this component when designing systems requiring standard RS-232 signaling without access to negative voltage rails. Confirm that the application environment falls within the specified -40°C to +85°C temperature range. Verify that the board layout accommodates the necessary external capacitors for the internal charge pump functionality.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers designed for EIA/TIA-232E and V.28/V.24 applications. The family offers various configurations with different numbers of drivers and receivers, as well as options for integrated or external capacitors.

Replacement Considerations

Direct replacements within the same family include the MAX232AESE+ and MAX232ESE+. These variants share identical pinouts and core electrical characteristics but may differ in temperature ranges or manufacturing revisions.

FAQ

What is the function of the external capacitors C1 through C4?

The external capacitors are essential for the internal dual charge-pump DC-DC voltage converters. They convert the single +5V input into the ±10V levels required for RS-232 driver operation.

Does the MAX232CEASE+ support a shutdown mode?

No, the standard MAX232 variant does not include a shutdown control pin. Only specific members of the MAX220–MAX249 family, such as the MAX222 or MAX230, feature shutdown capabilities.