MAX232ACWE

Overview

The MAX232ACWE is a dual-channel RS-232 transceiver designed for EIA/TIA-232E and V.28/V.24 communication interfaces. It operates from a single +5V supply, utilizing an internal charge pump to generate the required ±10V levels without external bipolar supplies. The device features two drivers and two receivers with full-duplex operation. Electrical specifications include a data rate of 200 kbps, a supply voltage range of 4.5V to 5.5V, and a typical supply current of 10mA. It supports TTL/CMOS logic levels and provides input protection up to ±30V. The component is housed in a 16-pin SOIC package and functions within an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates dual charge-pump circuitry to convert a single +5V supply into the necessary positive and negative voltages for RS-232 signaling.
• Provides bidirectional level translation between TTL/CMOS logic inputs and standard RS-232 output voltage swings.
• Includes built-in receiver input protection capable of withstanding signals up to ±30V.

Applications

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

Procurement Notes

Verify the specific suffix 'ACWE' against the manufacturer's current ordering guide to confirm the exact temperature grade and package variant. Ensure that the required external capacitors match the datasheet recommendations for stable charge-pump operation. Confirm compliance with relevant environmental directives if applicable to the target market.

Selection Notes

Select this component when a single +5V power source is available and bipolar supplies are not feasible. Consider the MAX232ACWE for applications requiring moderate data rates up to 200 kbps. Evaluate alternative packages or extended temperature variants if the operating environment exceeds the commercial range or requires different mounting styles.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers developed by Maxim Integrated, now part of Analog Devices. The family offers various channel counts and control features tailored for serial communication needs. The MAX232ACWE specifically addresses standard dual-channel requirements using external capacitors for its internal voltage generation.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the MAX232CWE and MAX232AEWE. Verify that any replacement maintains the required operating temperature range and electrical characteristics for the specific application design.