MIC2551ABTS Equivalent & Substitute Parts

Part Overview

The MIC2551ABTS is a half-duplex USB 2.0 transceiver IC manufactured by Microchip Technology, housed in a 14-TSSOP surface mount package. This component is designed for interface applications requiring single-channel transceiver functionality at USB 2.0 data rates. The MIC2551ABTS is currently discontinued at DiGi Electronics, making identification of compatible substitute parts essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
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 Range	-40°C ~ 85°C
Package Type	14-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

The MIC2550AYTS qualifies as a parametric equivalent to the MIC2551ABTS based on the following critical substitution criteria:

Electrical Compatibility:

Identical protocol specification (USB 2.0)
Matching transceiver configuration (1/1 drivers/receivers, half-duplex)
Identical data rate (12 Mbps)
Identical receiver hysteresis (200 mV)
Matching supply voltage range (4V ~ 5.25V)
Identical operating temperature range (-40°C ~ 85°C)

Mechanical Compatibility:

Identical package type (14-TSSOP)
Identical package dimensions (0.173", 4.40mm Width)
Identical mounting type (Surface Mount)
Identical moisture sensitivity level (MSL 1)

Regulatory Alignment:

Both parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications
Both are REACH Unaffected

The primary differences between these parts are packaging format (Bulk vs. Tube) and product status (Discontinued vs. Active), with no impact on electrical or mechanical substitution viability.

Parameter Comparison

Parameter	MIC2551ABTS	MIC2550AYTS
Manufacturer	Microchip Technology	Microchip Technology
Protocol	USB 2.0	USB 2.0
Type	Transceiver	Transceiver
Number of Drivers/Receivers	1/1	1/1
Duplex Mode	Half	Half
Data Rate	12 Mbps	12 Mbps
Receiver Hysteresis	200 mV	200 mV
Voltage Supply Range	4V ~ 5.25V	4V ~ 5.25V
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	14-TSSOP	14-TSSOP
Package Dimensions	0.173" × 4.40mm Width	0.173" × 4.40mm Width
Mounting Type	Surface Mount	Surface Mount
MSL Rating	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Format	Bulk	Tube
Inventory Availability	705 Pcs	10,100 Pcs

Engineering Selection Recommendations

The MIC2550AYTS is the direct parametric substitute for the MIC2551ABTS. Selection between these parts should be based on the following factors:

Product Status: The MIC2551ABTS is discontinued, while the MIC2550AYTS maintains active product status with significantly higher inventory availability (10,100 units vs. 705 units). For new designs or production continuity, the MIC2550AYTS is the appropriate choice.

Compliance Considerations: The MIC2550AYTS carries ROHS3 compliance certification, whereas the MIC2551ABTS is RoHS non-compliant. Applications subject to RoHS requirements must use the MIC2550AYTS.

Packaging and Logistics: The MIC2550AYTS is supplied in Tube packaging, while the MIC2551ABTS is supplied in Bulk format. Tube packaging may impose minimum order quantity or handling requirements depending on supplier policies.

Electrical and Mechanical Equivalence: All critical electrical parameters, mechanical dimensions, and regulatory classifications are identical between the two parts, ensuring direct substitution without circuit redesign or PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can the MIC2550AYTS be used as a direct replacement for the MIC2551ABTS in existing designs?

A: Yes. The MIC2550AYTS is electrically and mechanically equivalent to the MIC2551ABTS. All functional parameters, package dimensions, and pin configurations are identical. No circuit modifications or PCB layout changes are required.

Q: What are the key differences between these two parts?

A: The primary differences are product status (discontinued vs. active), RoHS compliance (non-compliant vs. ROHS3 compliant), packaging format (Bulk vs. Tube), and inventory availability. Electrical and mechanical specifications are identical.

Q: Does the packaging format difference (Bulk vs. Tube) affect compatibility?

A: No. Packaging format affects only logistics, handling, and storage procedures. The components themselves are identical and function identically in the circuit.

Q: Is the MIC2550AYTS suitable for applications requiring RoHS compliance?

A: Yes. The MIC2550AYTS carries ROHS3 compliance certification. The MIC2551ABTS is RoHS non-compliant and cannot be used in RoHS-regulated applications.

Q: Are there any pin configuration differences between these parts?

A: No. Both parts use the 14-TSSOP package with identical pin assignments and electrical characteristics.

Q: What is the moisture sensitivity level for both parts?

A: Both the MIC2551ABTS and MIC2550AYTS have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

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