MAX234CWE+

Overview

The MAX234CWE+ is a +5V-powered, quad-channel RS-232 driver/receiver integrated circuit 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 120kbps. The device features four drivers and no receivers, providing full-duplex communication capabilities. It utilizes an internal charge pump to generate the necessary ±10V levels from a single +5V supply, eliminating the need for external bipolar power sources. The component is housed in a 16-pin Wide SOIC package (SO-Wide-16) designed for surface-mount installation.

Feature Summary

• Integrates dual charge-pump circuits to convert a single +5V supply into the required ±10V voltages for RS-232 signaling.
• Provides four independent transmitter channels for driving RS-232 signals without requiring external bipolar power supplies.
• Designed for EIA/TIA-232E and V.28/V.24 communications interfaces, enabling direct connection between TTL/CMOS logic and serial ports.

Applications

• Interface translation between microcontroller systems and RS-232 peripherals
• Multidrop RS-232 network connections
• Portable diagnostic equipment requiring serial communication

Procurement Notes

Verify the specific suffix 'CWE+' against the manufacturer's current ordering guide to confirm the commercial temperature range and lead-free packaging status. Confirm that the Wide SOIC package dimensions match the target PCB footprint requirements before finalizing procurement orders.

Selection Notes

Select this component when a design requires four transmit channels but does not necessitate receiver functionality. Ensure the application environment remains within the 0°C to +70°C operating temperature range. Verify that the 120kbps maximum data rate meets the system's throughput requirements.

Part Context

This part belongs to the MAX220–MAX249 family of line drivers and receivers. These devices are specifically engineered for applications where generating ±12V or ±15V supplies is impractical. The family offers various channel configurations and package options to accommodate different board space and interface density constraints.

Replacement Considerations

Direct functional substitutes within the same family include the MAX234CWE-T. For designs requiring integrated capacitors, consider the MAX233CWE+. Higher performance alternatives with faster data rates include the MAX3232 series.