MIC2551ABML-TR USB 2.0 Half Transceiver Equivalent & Substitute Parts

Part Overview

The MIC2551ABML-TR is a USB 2.0 half transceiver interface IC manufactured by Microchip Technology in a 16-MLF® (4x4) surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production needs. The device operates as a 1/1 transceiver with half-duplex capability, supporting 12 Mbps data rates across the USB 2.0 protocol specification.

Substiute Parts

MIC2551ABML-TR

Microchip TechnologyIn Stock: 880MIC2551ABML-TR Datasheet

Current PartRFQ

MIC2550AYML-TR

Microchip TechnologyIn Stock: 2383MIC2550AYML-TR Datasheet

Parametric EquivalentRFQ

MIC2551AYML-TR

Microchip TechnologyIn Stock: 843MIC2551AYML-TR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC2551ABML-TR is determined by strict equivalence across the following parameters:

• Protocol: USB 2.0
• Transceiver configuration: 1/1 (one driver, one receiver)
• Duplex mode: Half
• Data rate: 12 Mbps
• Receiver hysteresis: 200 mV
• Supply voltage range: 4V ~ 5.25V
• Operating temperature range: -40°C ~ 85°C
• Package: 16-VQFN Exposed Pad, 16-MLF® (4x4)
• Mounting type: Surface Mount

The identified substitute parts maintain full parametric equivalence across all electrical and mechanical specifications. Differences in product status, packaging format (Tape & Reel vs. Cut Tape), RoHS compliance revision, and moisture sensitivity level do not affect functional interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production continuity, MIC2550AYML-TR is the primary substitute. This part maintains full electrical and mechanical equivalence while offering Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

MIC2551AYML-TR provides an alternative substitute with identical electrical specifications and ROHS3 compliance. However, its Obsolete status limits suitability for long-term production planning.

Both substitute parts are available in higher inventory quantities than the discontinued MIC2551ABML-TR, supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can MIC2550AYML-TR directly replace MIC2551ABML-TR in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all specified parameters: USB 2.0 protocol, 1/1 transceiver configuration, half-duplex mode, 12 Mbps data rate, 200 mV receiver hysteresis, 4V–5.25V supply range, -40°C to 85°C operating temperature, and 16-MLF® (4x4) package. No circuit modifications are required.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous carrier tape suitable for automated pick-and-place assembly. Cut Tape (CT) packaging provides the same components pre-cut into individual strips. Both formats contain identical parts; packaging selection depends on assembly equipment and volume requirements.

Q: Why does MIC2550AYML-TR have a lower MSL rating than MIC2551ABML-TR?

A: MSL (Moisture Sensitivity Level) ratings reflect moisture absorption characteristics during storage. MIC2550AYML-TR carries MSL 2 (1 Year), indicating lower moisture sensitivity and longer shelf life compared to MIC2551ABML-TR at MSL 3 (168 Hours). This difference does not affect functional performance and represents an improvement for inventory management.

Q: Is RoHS compliance a functional requirement for substitution?

A: RoHS compliance is a regulatory and supply chain consideration, not a functional electrical parameter. MIC2550AYML-TR and MIC2551AYML-TR both meet ROHS3 standards, supporting compliance with environmental regulations. The original MIC2551ABML-TR is RoHS non-compliant, making ROHS3-compliant substitutes preferable for regulated applications.

Q: Can MIC2551AYML-TR be used despite its Obsolete status?

A: MIC2551AYML-TR maintains full electrical and mechanical equivalence and is currently in stock. However, Obsolete status indicates Microchip Technology has discontinued production and support. For designs requiring long-term availability and manufacturer support, MIC2550AYML-TR (Active status) is the recommended choice.