MAX3223ECPWG4

Overview

The MAX3223ECPWG4 is a dual-channel RS-232 transceiver manufactured by Texas Instruments, designed for serial communication interfaces. It operates within a supply voltage range of 3.0 V to 5.5 V and supports data rates up to 500 kbit/s. The device integrates two drivers and two receivers in a single package. Key electrical specifications include a typical operating supply current of 1 mA and an extended industrial temperature range from -40°C to +85°C. It features ±15-kV electrostatic discharge (ESD) protection on the bus pins, ensuring robustness against transient events. The component utilizes four external 0.1-μF capacitors for charge pump functionality and is housed in a TSSOP-20 surface-mount package.

Feature Summary

• Integrated ±15-kV ESD protection on RS-232 bus pins for enhanced signal integrity and hardware durability.
• Automatic shutdown feature reduces standby power consumption by disabling drivers and enabling low-power modes when no valid signal is present.
• True 3-V to 5.5-V operation allows compatibility with both 3.3-V and 5-V logic systems without level shifting requirements.

Applications

• Industrial control systems requiring reliable serial communication in electrically noisy environments.
• Portable battery-powered equipment utilizing low standby current to extend operational life.
• Data acquisition modules interfacing microcontrollers with RS-232 peripherals.

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free and RoHS compliance status according to Texas Instruments documentation. Confirm the package variant matches the TSSOP-20 footprint requirements for your PCB layout. Ensure the revision level aligns with your design's timing constraints. Cross-reference the manufacturer part number directly with official TI databases to avoid counterfeit components. Validate that the sourcing channel provides traceability for quality assurance purposes.

Selection Notes

Select this component when designing systems requiring dual RS-232 channels with integrated ESD protection. It is suitable for applications needing low standby current due to its automatic shutdown capability. Choose this part over non-shutdown variants if power efficiency during idle states is critical. Ensure the design accommodates the required four external capacitors for the internal charge pumps. Verify that the TSSOP-20 package dimensions fit within the available board space constraints.

Part Context

The MAX3223E series belongs to Texas Instruments' family of multichannel RS-232 line drivers and receivers. This specific model represents the enhanced version with automatic shutdown features, distinguishing it from standard variants like the MAX3223IDBRG4 which lacks this power management function. The 'E' designation typically denotes the extended industrial temperature range. The 'CPW' suffix identifies the TSSOP-20 package type, while 'G4' signifies environmental compliance attributes defined by the manufacturer.

Replacement Considerations

The MAX3223EIPWR serves as a pin-compatible alternative in a TSSOP-20 package. The MAX3223ECAP is another option in an SSOP-20 package with similar electrical characteristics. Verify pinout compatibility before substitution. Check if the replacement part maintains the same automatic shutdown functionality and ESD protection levels. Confirm that the thermal performance and package dimensions are acceptable for the existing assembly.