MAX3238CDBR

Overview

The MAX3238CDBR is a multichannel RS-232 line driver and receiver manufactured by Texas Instruments. It operates from a single 3-V to 5.5-V power supply and features five drivers and three receivers for full-duplex communication. The device supports data rates up to 250 kb/s with a typical operating supply current of 2 mA. It includes integrated charge pumps that require only five external 0.1-F capacitors. The component provides ±15-kV electrostatic discharge (ESD) protection on both the RS-232 lines and the PC interface bus according to Human Body Model standards. It is housed in a 16-pin SSOP package.

Feature Summary

• Multichannel architecture providing five independent drivers and three receivers for complex serial communication interfaces.
• Integrated charge pump circuitry eliminates the need for external dual-voltage supplies, simplifying board layout.
• Robust ±15-kV ESD protection ensures signal integrity and component safety against electrostatic events.
• Low-power design enables extended battery life in portable applications through reduced quiescent current consumption.

Applications

• Portable computers and notebook systems requiring multiple serial ports.
• Industrial control systems utilizing RS-232 communication protocols.
• Modems and handheld terminals needing reliable data transmission.
• Point-of-sale (POS) systems and medical equipment interfaces.

Procurement Notes

Verify the specific suffix 'CDBR' corresponds to the commercial temperature range and tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation or certified datasheets prior to integration. Ensure the ordering part number matches the required pinout and electrical specifications exactly to avoid compatibility issues in final assembly.

Selection Notes

Select this component when designing systems requiring five transmit and three receive channels within a compact footprint. It is suitable for applications demanding high ESD immunity without external protection components. Compare performance metrics such as data rate limits and supply voltage ranges against alternative transceivers to ensure alignment with system timing and power constraints.

Part Context

This device belongs to the MAX323x family of RS-232 transceivers designed for low-voltage operation. It shares functional similarities with other members like the MAX3237 and MAX3243 but offers a higher channel count. The family is widely used in embedded systems where space efficiency and robust interface protection are critical requirements for long-term reliability.

Replacement Considerations

Publicly confirmed substitute part numbers include the MAX3238IDB and MAX3238IPWR. Verify pin compatibility and electrical parameter equivalence before substitution. Ensure the replacement variant meets the same environmental and packaging requirements as the original design specification.