MAX3223ECDWR

Overview

The MAX3223ECDWR is a fully integrated RS-232 transceiver manufactured by Texas Instruments, designed for data communication applications requiring full-duplex operation. It features two drivers and two receivers within a single package, supporting data rates up to 250 kbps. The device operates from a single 3 V to 5.5 V power supply and utilizes small external charge pumps with four 0.1 µF capacitors. It is housed in a 20-pin SOIC (0.295 inch, 7.50 mm wide) surface-mount package. The component is rated for an operating temperature range of 0°C to 70°C and includes receiver input hysteresis of 500 mV to improve noise immunity.

Feature Summary

• Integrates dual drivers and dual receivers for complete RS-232 full-duplex communication functionality.
• Operates efficiently on a single low-voltage power supply ranging from 3 V to 5.5 V.
• Incorporates internal charge pump circuitry requiring only four small external capacitors.
• Features receiver input hysteresis to enhance signal integrity in noisy environments.

Applications

• Industrial control systems requiring robust serial communication interfaces.
• Portable battery-powered devices utilizing low-voltage microcontrollers.
• Modems and fax machines implementing standard RS-232 protocols.

Procurement Notes

Verify the specific suffix 'E' indicates the industrial temperature grade extension compared to the 'C' variant. Confirm the 'DWR' suffix corresponds to the 20-SOIC tape-and-reel packaging format. Ensure compatibility with RoHS 3 standards as indicated by manufacturer documentation. Cross-reference the exact part number against current datasheets to confirm active status and any recent PCN updates regarding material or design changes.

Selection Notes

Select this component when dual-channel RS-232 transmission is required within a compact surface-mount footprint. The extended temperature range makes it suitable for broader environmental conditions than commercial-grade alternatives. Verify that the 250 kbps data rate meets system timing requirements. Ensure the 20-pin SOIC package dimensions fit the available PCB real estate constraints.

Part Context

This part belongs to the MAX3223 family of RS-232 transceivers, which are widely used for serial communication. The 'E' designation typically denotes an extended temperature range, distinguishing it from the commercial 'C' version. The 'DWR' suffix specifies the tube or reel packaging type for automated assembly. This series is known for low power consumption and minimal external component count.

Replacement Considerations

The MAX3223EIDBR is listed as a substitute option. Verify pinout compatibility and electrical specifications before substitution. Ensure the alternative package matches the existing board layout constraints.