TC649EUA Equivalent & Substitute Parts

Part Overview

The TC649EUA is a Brushless DC (BLDC) motor driver controller manufactured by Microchip Technology, part of the FanSense™ series. This integrated circuit functions as a speed controller with pre-driver low-side output configuration, designed for fan control applications. The device operates across a 3V to 5.5V supply voltage range and is housed in an 8-MSOP surface mount package. As an active product with ROHS3 compliance and unlimited moisture sensitivity rating, the TC649EUA serves as a primary component in BLDC motor control systems. Equivalent and substitute parts are identified based on matching electrical specifications, package compatibility, and functional parameters.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Motor Type	Brushless DC (BLDC)
Function	Controller - Speed
Output Configuration	Pre-Driver - Low Side
Interface	Parallel
Applications	Fan Controller
Voltage Supply Range	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package Type	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TC649EUA are identified based on strict parameter matching within the Microchip FanSense™ series. All substitute parts share the following critical parameters with the main part:

Manufacturer: Microchip Technology
Motor Type: Brushless DC (BLDC)
Function: Speed Controller
Output Configuration: Pre-Driver - Low Side
Interface: Parallel
Applications: Fan Controller
Voltage Supply Range: 3V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Package Type: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
REACH Status: REACH Unaffected
ECCN: EAR99
HTSUS: 8542.31.0001

The substitute parts TC642BEUA, TC647BEUA, and TC649BEUA are parametric equivalents that maintain identical electrical and mechanical specifications, enabling direct substitution in BLDC motor control applications.

Parameter Comparison

Parameter	TC649EUA	TC642BEUA	TC647BEUA	TC649BEUA
Manufacturer	Microchip Technology	Microchip Technology	Microchip Technology	Microchip Technology
Series	FanSense™	FanSense™	FanSense™	FanSense™
Motor Type - AC, DC	Brushless DC (BLDC)	Brushless DC (BLDC)	Brushless DC (BLDC)	Brushless DC (BLDC)
Function	Controller - Speed	Controller - Speed	Controller - Speed	Controller - Speed
Output Configuration	Pre-Driver - Low Side	Pre-Driver - Low Side	Pre-Driver - Low Side	Pre-Driver - Low Side
Interface	Parallel	Parallel	Parallel	Parallel
Applications	Fan Controller	Fan Controller	Fan Controller	Fan Controller
Voltage - Supply	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99	EAR99
HTSUS	8542.31.0001	8542.31.0001	8542.31.0001	8542.31.0001
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All substitute parts—TC642BEUA, TC647BEUA, and TC649BEUA—are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use. The primary distinction among these parts is the Moisture Sensitivity Level (MSL) rating:

TC649EUA and TC642BEUA carry MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage and handling.
TC647BEUA and TC649BEUA carry MSL 2 (1 Year), requiring controlled storage conditions with a one-year shelf life limit under specified humidity levels.

Selection between these parts should be based on supply chain availability, inventory status, and storage capability requirements. All parts maintain identical electrical performance, package compatibility, and functional specifications for BLDC motor control applications.

Frequently Asked Questions (FAQ)

Q: Can TC642BEUA, TC647BEUA, and TC649BEUA be used interchangeably with TC649EUA?

A: Yes. All substitute parts share identical electrical specifications, functional parameters, and package dimensions. Direct substitution is supported for BLDC motor control applications operating within the 3V to 5.5V supply range.

Q: What is the difference between MSL 1 and MSL 2 ratings?

A: MSL 1 (Unlimited) indicates no moisture sensitivity constraints. MSL 2 (1 Year) requires storage in controlled humidity environments with a one-year shelf life limit. Selection depends on storage conditions and handling procedures at your facility.

Q: Are all substitute parts surface mount compatible?

A: Yes. All parts use 8-MSOP surface mount packaging with identical pin configuration and footprint dimensions (0.118", 3.00mm Width), enabling direct PCB placement without layout modifications.

Q: Do substitute parts maintain the same operating temperature range?

A: Yes. All parts operate across -40°C to 85°C (TA), supporting identical thermal performance specifications for fan controller applications.

Q: Are there any compliance differences between the main part and substitutes?

A: No. All parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8542.31.0001) classifications.

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