MAX3223ECDBR

Overview

The MAX3223ECDBR is a dual-channel RS-232 transceiver manufactured by Texas Instruments, designed for serial communication in portable and industrial 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 data transmission at speeds up to 500 kbit/s. It incorporates ±15-kV electrostatic discharge (ESD) protection on all RS-232 bus pins, ensuring robustness against electrical stress. The component utilizes four external 0.1-μF capacitors for charge pumping and includes an AutoShutdown feature that reduces standby current to approximately 1 μA when the transmitter is inactive.

Feature Summary

• Integrated ±15-kV ESD protection on RS-232 bus pins for enhanced reliability
• AutoShutdown function minimizes power consumption during idle periods
• Compatible with single 3-V to 5.5-V power supply without requiring negative voltages
• Accepts 5-V logic inputs while operating from a 3.3-V supply

Applications

• Portable computers and notebook PCs
• Handheld devices and PDAs
• Industrial control systems
• Modems and fax machines

Procurement Notes

Verify the specific suffix 'CDBR' indicates commercial temperature grade and tape-and-reel packaging. Confirm RoHS compliance status through official datasheets or manufacturer declarations. Ensure the source document matches the exact part number to avoid confusion with similar variants like MAX3223IDBR or MAX3223EIDBR, which may differ in temperature range or performance specifications.

Selection Notes

Select this component when designing systems requiring full-duplex RS-232 communication with low power consumption. It is suitable for applications needing high ESD immunity and operation from a single 3-V or 5-V supply. Consider the SSOP-20 package constraints for PCB layout. Verify that the required data rate does not exceed 500 kbit/s and that the operating environment falls within the commercial temperature range.

Part Context

The MAX3223ECDBR belongs to the MAX3223 family of multichannel RS-232 line drivers and receivers. This series is characterized by its ability to operate from a single low-voltage supply while generating the necessary positive and negative voltages for RS-232 signaling. The 'E' suffix typically denotes extended or enhanced features such as higher speed or improved ESD protection compared to earlier versions.

Replacement Considerations

• MAX3223IDBR
• MAX3223EIDBR
• TRS3223CDBR

FAQ

What is the typical standby current of the MAX3223ECDBR?

The typical standby current is 1 μA when the AutoShutdown feature is active.

Does the MAX3223ECDBR require negative supply voltages?

No, it operates from a single 3-V to 5.5-V supply and generates internal negative voltages via charge pumps.

What is the maximum data rate supported by this device?

The device supports data rates up to 500 kbit/s.