MAX232CWE+T

Overview

The MAX232CWE+T is a +5V-powered, multichannel RS-232 driver and receiver integrated circuit manufactured by Analog Devices / Maxim Integrated. It operates within a supply voltage range of 4.5 V to 5.5 V with a typical operating current of 10 mA. The device supports full-duplex communication at data rates up to 200 kb/s. It features two drivers and two receivers, housed in a 16-pin SOIC package suitable for surface mount technology. The component functions across an industrial temperature range from 0°C to +70°C.

Feature Summary

• Integrated charge pump circuitry eliminates the need for external bipolar ±12V power supplies, enabling single-supply operation.
• Designed specifically for EIA/TIA-232E and V.28/V.24 communications interfaces where standard dual-polarity voltages are unavailable.
• Provides full-duplex signal conversion between TTL/CMOS logic levels and RS-232 voltage standards.

Applications

• Interface translation between microcontrollers and serial ports
• Multidrop RS-232 network connections
• Portable diagnostics equipment

Procurement Notes

Verify the specific suffix '+T' against official manufacturer documentation to confirm reel packaging specifications. Ensure the component meets RoHS compliance requirements as indicated in the datasheet. Cross-reference the ordering information table in the official PDF to validate the exact package variant and temperature grade before procurement.

Selection Notes

Select this component when designing systems requiring RS-232 connectivity powered exclusively by a single +5V rail. Verify that the required data rate does not exceed 200 kb/s and that the application environment remains within the 0°C to +70°C operational temperature limits defined for the 'C' grade device.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers. These devices share a common architecture utilizing internal charge pumps to generate necessary RS-232 voltage swings from a low-voltage source. The MAX232CWE+T represents a specific commercial-grade iteration within this broader series of interface transceivers.

Replacement Considerations

Public confirmed substitute part numbers: MAX232CPE+, MAX232EWE+T, MAX232CWE-TG002.

FAQ

Does the MAX232CWE+T require external capacitors for the charge pump?

Yes, the datasheet specifies the use of external capacitors (typically 0.1µF) connected to the C1, C2, C3, C4, and C5 pins to support the internal voltage doubling and inversion circuits.

What is the input voltage tolerance for the receiver inputs?

The receiver inputs (R1IN, R2IN) can withstand voltages up to ±30V without damage, providing protection against accidental connection to live RS-232 lines.