MAX3223IDBR

Overview

The MAX3223IDBR is a dual RS-232 transceiver manufactured by Texas Instruments, designed for multi-channel line driving and receiving applications. It operates within a supply voltage range of 3 V to 5.5 V, supporting both 3.3 V and 5 V logic systems. The device features two drivers and two receivers, enabling full-duplex communication with a data rate of up to 250 kb/s. Packaged in a 20-pin SSOP format, it includes an integrated shutdown mode to minimize power consumption during idle periods. The component supports EIA/TIA-232-F and V.28 standards, ensuring compatibility with standard serial interfaces.

Feature Summary

• Integrated shutdown functionality reduces power consumption when the device is not actively transmitting or receiving data.
• Capacitor-less design simplifies external circuit requirements while maintaining reliable signal integrity.
• Built-in electrostatic discharge (ESD) protection safeguards against transient voltage events on input and output lines.

Applications

• Portable equipment requiring low-power serial communication interfaces
• Modems and fax machines utilizing standard RS-232 protocols
• Industrial control systems operating in environments with moderate electromagnetic interference

Procurement Notes

Verify the specific suffix 'IDBR' corresponds to the tape-and-reel packaging configuration rather than tube packaging. Confirm that the revision level matches current manufacturing specifications, as older variants may have different electrical characteristics. Ensure compliance with RoHS directives if required for the target assembly process. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm authenticity and traceability.

Selection Notes

Select this component when a dual-channel RS-232 interface is required with minimal external capacitance. It is suitable for designs needing operation across a wide voltage range from 3 V to 5.5 V. Consider the 20-SSOP package dimensions for PCB layout constraints. Evaluate the 250 kb/s data rate limit against application speed requirements before finalizing the selection.

Part Context

This part belongs to the MAX3223 family of RS-232 transceivers, which are widely used in legacy serial communication systems. The 'E' variant typically denotes extended temperature ranges, while the base IDBR designation specifies the industrial grade and packaging type. It serves as a direct interface between microprocessors and RS-232 ports, bridging logic levels to standard serial voltages.

Replacement Considerations

The MAX3223EIDBR is listed as a manufacturer-recommended alternative, offering similar functionality with potentially updated specifications. Other compatible devices include the ICL3225EIAZ-T and MAX3223EEAP+, which provide equivalent dual-driver/receiver capabilities in different package formats.