MIC2544-1YM Equivalent & Substitute Parts

Part Overview

The MIC2544-1YM is an active N-Channel power switch/driver IC manufactured by Microchip Technology, designed for USB switching applications. This 8-SOIC surface mount component delivers 1.5A maximum output current with adjustable current limiting and over-temperature protection. The part is in active production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, design flexibility, or application-specific packaging preferences.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Switch Type	USB Switch
Output Configuration	High Side
Output Type	N-Channel
Ratio - Input:Output	1:1
Number of Outputs	1
Voltage - Load	2.7V ~ 5.5V
Current - Output (Max)	1.5A
Rds On (Typ)	80mOhm
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Features	Status Flag
Fault Protection	Current Limiting (Adjustable), Over Temperature
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MIC2544-1YM are identified based on strict electrical and mechanical parameter equivalence. All substitute candidates maintain identical specifications across the following critical parameters:

Switch type: USB Switch
Output configuration: High Side N-Channel
Input:Output ratio: 1:1
Load voltage range: 2.7V ~ 5.5V
Maximum output current: 1.5A
On-resistance (typical): 80mOhm
Operating temperature range: -40°C ~ 85°C
Package: 8-SOIC (0.154", 3.90mm Width)
Interface: On/Off with Status Flag
Fault protection: Current Limiting (Adjustable) and Over Temperature
Compliance: ROHS3, MSL 1, REACH Unaffected

Substitutes are grouped into two base product families: MIC2544 series (including MIC2544-2YM, MIC2544A-1YM, MIC2544A-2YM) and MIC2548 series (MIC2548-1YM, MIC2548-2YM). Differences between variants are limited to internal die revisions and manufacturing date codes, with no impact on functional or electrical performance.

Parameter Comparison

Part Number	Manufacturer	Base Product	Switch Type	Output Type	Current - Output (Max)	Rds On (Typ)	Voltage - Load	Operating Temp	Package	RoHS Status	Inventory (Pcs)
MIC2544-1YM	Microchip Technology	MIC2544	USB Switch	N-Channel	1.5A	80mOhm	2.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	1350
MIC2544-2YM	Microchip Technology	MIC2544	USB Switch	N-Channel	1.5A	80mOhm	2.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	3221
MIC2544A-1YM	Microchip Technology	MIC2544	USB Switch	N-Channel	1.5A	80mOhm	2.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	2200
MIC2544A-2YM	Microchip Technology	MIC2544	USB Switch	N-Channel	1.5A	80mOhm	2.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	1628
MIC2548-1YM	Microchip Technology	MIC2548	USB Switch	N-Channel	1.5A	80mOhm	2.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	30592
MIC2548-2YM	Microchip Technology	MIC2548	USB Switch	N-Channel	1.5A	80mOhm	2.7V ~ 5.5V	-40°C ~ 85°C	8-SOIC	ROHS3 Compliant	5700

Engineering Selection Recommendations

All listed substitute parts maintain active product status with Microchip Technology and carry identical ROHS3 compliance and REACH unaffected certifications. Selection between MIC2544-1YM and its substitutes should be based on:

Inventory availability: MIC2548-1YM offers the highest stock level (30,592 pcs), followed by MIC2544-2YM (3,221 pcs). MIC2544-1YM maintains 1,350 pcs in stock.
Base product family: MIC2544 series (including A-revision variants) and MIC2548 series are functionally equivalent. The MIC2548 family represents a later design iteration with enhanced manufacturing processes but identical electrical performance.
Packaging and date code: All parts use identical 8-SOIC packaging. Suffix designations (-1YM, -2YM) and revision letters (A) indicate manufacturing date codes and internal die revisions with no functional impact on circuit performance.
Compliance requirements: All parts satisfy ROHS3, MSL 1, and REACH requirements for applications requiring regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can MIC2548-1YM be used as a direct replacement for MIC2544-1YM?

A: Yes. Both parts share identical electrical specifications, output current rating (1.5A), on-resistance (80mOhm), voltage range (2.7V ~ 5.5V), operating temperature (-40°C ~ 85°C), and 8-SOIC package footprint. The MIC2548 represents a later product generation with equivalent performance.

Q: What is the difference between MIC2544-1YM and MIC2544A-1YM?

A: The "A" revision indicates an internal die update by Microchip Technology. Both variants maintain identical electrical and mechanical specifications. The revision change does not affect circuit compatibility or performance.

Q: Are the -1YM and -2YM suffixes interchangeable?

A: Yes. These suffixes denote manufacturing date codes and tape/reel packaging specifications. Electrical and mechanical specifications are identical between -1YM and -2YM variants of the same base part number.

Q: Does the 8-SOIC package remain consistent across all substitute parts?

A: Yes. All listed parts use the 8-SOIC package with 0.154" width (3.90mm). PCB footprints and land patterns are identical across all substitutes.

Q: Which substitute part should be selected for new designs?

A: MIC2548-1YM or MIC2548-2YM are recommended for new designs, as they represent the current product generation. However, any listed substitute meets identical functional requirements and can be selected based on inventory availability and procurement lead times.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed parts carry ROHS3 compliance certification and REACH unaffected status, meeting regulatory requirements for consumer and industrial applications.

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