MCP2221T-I/ST USB to I2C/UART Bridge Interface IC

Part Overview

The MCP2221T-I/ST is an active USB bridge interface device manufactured by Microchip Technology, designed to facilitate USB to I2C/UART communication. This 14-TSSOP packaged IC operates as a USB 2.0 compliant bridge, enabling host systems to communicate with I2C and UART peripheral devices through a single USB connection. The device is actively produced and widely stocked, with 3100 units available in new original condition. Alternative models may be required due to inventory constraints, specific design revisions, or application-specific performance requirements.

Substiute Parts

MCP2221T-I/ST

Microchip TechnologyIn Stock: 3167MCP2221T-I/ST Datasheet

Current PartRFQ

MCP2221AT-I/ST

Microchip TechnologyIn Stock: 5409MCP2221AT-I/ST Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MCP2221T-I/ST is determined by strict equivalence across the following critical parameters:

• Functional Equivalence: Bridge function connecting USB to I2C/UART protocols
• Electrical Specifications: Voltage supply range (3V ~ 5.5V), supply current (13mA), and operating temperature range (-40°C ~ 85°C)
• Interface Standards: USB 2.0 protocol compliance with I2C and UART interface support
• Package Compatibility: 14-TSSOP package form factor (0.173", 4.40mm Width)
• Regulatory Compliance: ROHS3 compliance and equivalent certifications (REACH Unaffected, EAR99 classification)
• Base Product Series: MCP2221 series designation

The MCP2221AT-I/ST qualifies as a parametric equivalent substitute, meeting all specified electrical, mechanical, and regulatory requirements without deviation.

Parameter Comparison

Engineering Selection Recommendations

The MCP2221AT-I/ST serves as a direct parametric equivalent to the MCP2221T-I/ST. Both devices are manufactured by Microchip Technology with active product status and identical electrical, mechanical, and regulatory specifications. Selection between these parts should be based on availability and inventory requirements. The MCP2221AT-I/ST currently maintains higher stock levels (5300 units) compared to the MCP2221T-I/ST (3100 units), making it suitable for applications requiring immediate procurement or larger volume orders. Both parts maintain ROHS3 compliance and equivalent certifications, ensuring regulatory compatibility across applications.

Frequently Asked Questions (FAQ)

Q: Can the MCP2221AT-I/ST be used as a direct replacement for the MCP2221T-I/ST?

A: Yes. The MCP2221AT-I/ST is a parametric equivalent with identical electrical specifications, package form factor, interface standards, and regulatory compliance. No design modifications are required for substitution.

Q: Are there any differences in the 14-TSSOP package between these parts?

A: No. Both parts use the identical 14-TSSOP package with 0.173" width and 4.40mm dimensions. PCB footprints and assembly processes remain unchanged.

Q: Do both parts support the same USB 2.0, I2C, and UART protocols?

A: Yes. Both the MCP2221T-I/ST and MCP2221AT-I/ST implement identical USB 2.0 bridge functionality with I2C and UART interface support. Protocol compatibility is complete.

Q: What is the significance of the temperature range -40°C ~ 85°C for both parts?

A: This operating temperature range is identical for both devices, ensuring equivalent thermal performance across industrial and commercial applications. No thermal derating differences exist between the parts.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the MCP2221T-I/ST and MCP2221AT-I/ST maintain ROHS3 compliance with REACH Unaffected status and EAR99 export classification.

Q: What supply voltage range do these parts require?

A: Both parts operate across the identical 3V ~ 5.5V supply voltage range with 13mA supply current, enabling compatibility with standard 3.3V and 5V logic systems.