MIC2551AYTS Equivalent & Substitute Parts

Part Overview

The MIC2551AYTS is a half-duplex USB 2.0 transceiver interface IC manufactured by Microchip Technology, housed in a 14-TSSOP surface mount package. This component functions as a 1/1 transceiver with a 12 Mbps data rate and 200 mV receiver hysteresis, designed for USB 2.0 protocol applications requiring half-duplex communication.

The MIC2551AYTS has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

MIC2551AYTS

Microchip TechnologyIn Stock: 13317MIC2551AYTS Datasheet

Current PartRFQ

MCP2221A-I/ST

Microchip TechnologyIn Stock: 1565MCP2221A-I/ST Datasheet

MFR RecommendedRFQ

MIC2550AYTS

Microchip TechnologyIn Stock: 10135MIC2550AYTS Datasheet

Parametric EquivalentRFQ

MIC2550YTS

Microchip TechnologyIn Stock: 1018MIC2550YTS Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC2551AYTS are categorized based on strict adherence to the following electrical and mechanical parameters:

Parametric Equivalents maintain identical or compatible specifications across all critical parameters:

• Protocol: USB 2.0
• Type: Transceiver
• Number of Drivers/Receivers: 1/1
• Duplex Mode: Half
• Data Rate: 12 Mbps
• Receiver Hysteresis: 200 mV
• Voltage Supply Range: 4V ~ 5.25V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-TSSOP (0.173", 4.40mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Functional Alternatives provide USB 2.0 interface capability within the same package footprint but serve different functional roles (USB bridge with I2C/UART interfaces rather than half-duplex transceiver operation).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Parametric Equivalents):

MIC2550AYTS and MIC2550YTS are parametric equivalents to the MIC2551AYTS. Both parts maintain identical electrical specifications, mechanical compatibility, and compliance certifications. Both are currently in active product status with available inventory. Selection between these two parametric equivalents depends on packaging preference (both supplied in Tube packaging) and inventory availability. MIC2550AYTS has higher inventory levels (10,100 pcs) compared to MIC2550YTS (983 pcs).

For Functional Alternative (Different Application Role):

MCP2221A-I/ST is a USB 2.0 interface IC from Microchip Technology in the same 14-TSSOP package. This part functions as a USB bridge providing I2C and UART interfaces rather than half-duplex transceiver operation. This substitute is applicable only when the design can accommodate a change in functional architecture from transceiver to USB-to-I2C/UART bridge. The MCP2221A-I/ST supports a wider supply voltage range (3V ~ 5.5V) and is currently in active product status with 1,511 pcs in inventory.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature ranges, ensuring regulatory and environmental compatibility with the original MIC2551AYTS specification.

Frequently Asked Questions (FAQ)

Q: Can MIC2550AYTS and MIC2550YTS be used interchangeably with MIC2551AYTS?

A: Yes. Both MIC2550AYTS and MIC2550YTS are parametric equivalents with identical electrical and mechanical specifications. They maintain the same USB 2.0 protocol, 1/1 transceiver configuration, half-duplex mode, 12 Mbps data rate, 200 mV receiver hysteresis, 4V ~ 5.25V supply voltage range, and 14-TSSOP package footprint. Both are currently in active product status.

Q: What is the difference between MIC2550AYTS and MIC2550YTS?

A: Both parts are parametric equivalents with identical specifications. The primary difference is inventory availability: MIC2550AYTS has 10,100 pcs in stock, while MIC2550YTS has 983 pcs in stock.

Q: Can MCP2221A-I/ST replace MIC2551AYTS in my application?

A: MCP2221A-I/ST is a functional alternative, not a parametric equivalent. It provides USB 2.0 interface capability in the same 14-TSSOP package but functions as a USB bridge with I2C and UART interfaces rather than a half-duplex transceiver. This substitute is applicable only if your design can accommodate a change from transceiver operation to USB-to-I2C/UART bridge functionality.

Q: Are all substitute parts RoHS compliant?

A: Yes. MIC2550AYTS, MIC2550YTS, and MCP2221A-I/ST are all ROHS3 compliant with MSL Level 1 rating, matching the compliance profile of the original MIC2551AYTS.

Q: What is the operating temperature range for these parts?

A: All substitute parts operate across the same temperature range as the MIC2551AYTS: -40°C ~ 85°C.

Q: Do the substitute parts fit the same PCB footprint?

A: Yes. All substitute parts use the 14-TSSOP (0.173", 4.40mm Width) package with surface mount configuration, ensuring mechanical compatibility with existing PCB designs for the MIC2551AYTS.

Q: What supply voltage range do these parts support?

A: MIC2550AYTS and MIC2550YTS support 4V ~ 5.25V, identical to the MIC2551AYTS. MCP2221A-I/ST supports a wider range of 3V ~ 5.5V, providing additional flexibility for lower voltage applications.