TC649VOA Equivalent & Substitute Parts

Part Overview

The TC649VOA is a Brushless DC (BLDC) motor driver controller manufactured by Microchip Technology, designed for fan control applications. Operating across a 3V to 5.5V supply voltage range, this 8-SOIC surface-mount integrated circuit functions as a speed controller with parallel interface and low-side pre-driver output configuration. The device is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Substitute parts become necessary when the primary TC649VOA experiences supply constraints, extended lead times, or when design flexibility permits selection from the FanSense™ series alternatives. All substitute candidates maintain identical electrical specifications and mechanical compatibility within the specified parameter set.

Substiute Parts

TC649VOA

Microchip TechnologyIn Stock: 1276TC649VOA Datasheet

Current PartRFQ

TC646VOA

Microchip TechnologyIn Stock: 2257TC646VOA Datasheet

Parametric EquivalentRFQ

TC647VOA

Microchip TechnologyIn Stock: 1196TC647VOA Datasheet

Parametric EquivalentRFQ

TC648VOA

Microchip TechnologyIn Stock: 3154TC648VOA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TC649VOA is determined by strict parametric matching across the following critical criteria:

• Motor Control Type: All substitutes must support Brushless DC (BLDC) motor control with speed controller function
• Electrical Interface: Parallel interface with low-side pre-driver output configuration required
• Supply Voltage: 3V to 5.5V operating range mandatory
• Package Compatibility: 8-SOIC surface-mount package with 0.154" (3.90mm) width specification
• Operating Temperature: 0°C to 85°C ambient temperature range
• Compliance: RoHS3 compliance and REACH unaffected status required

All four parts—TC649VOA, TC646VOA, TC647VOA, and TC648VOA—meet these substitution criteria. Differences exist only in series designation, moisture sensitivity level, and inventory availability, which do not affect functional or mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain Active product status with full RoHS3 compliance and REACH unaffected certification, confirming long-term availability and regulatory compliance for production applications.

TC649VOA remains the primary specification reference with unlimited moisture sensitivity (MSL 1) and established FanSense™ series designation.

TC646VOA provides direct substitution with identical electrical and mechanical parameters, highest inventory availability (2226 units), and unlimited moisture sensitivity rating.

TC647VOA qualifies as a functional substitute with identical electrical specifications but carries MSL 3 (168-hour moisture sensitivity limit), requiring controlled storage and handling procedures during manufacturing.

TC648VOA offers substitution capability with unlimited moisture sensitivity (MSL 1) and the highest inventory availability (3117 units), though series designation is not specified in the product documentation.

Selection among these alternatives should prioritize inventory availability and moisture sensitivity requirements aligned with manufacturing processes and storage conditions.

Frequently Asked Questions (FAQ)

Q: Can TC646VOA, TC647VOA, and TC648VOA be used interchangeably with TC649VOA in fan controller applications?

A: Yes, all three parts are parametric equivalents for BLDC motor speed control applications. They share identical supply voltage range (3V–5.5V), operating temperature (0°C–85°C), parallel interface configuration, low-side pre-driver output, and 8-SOIC package specifications. Functional compatibility is confirmed across all specified electrical and mechanical parameters.

Q: What is the significance of the MSL 3 rating on TC647VOA compared to MSL 1 on other parts?

A: MSL 3 indicates a 168-hour moisture sensitivity limit, requiring controlled storage at specified humidity levels and time-limited exposure after package opening. MSL 1 (unlimited) parts have no such restrictions. TC647VOA requires adherence to moisture control procedures during manufacturing, while TC649VOA, TC646VOA, and TC648VOA do not.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All four parts are supplied in 8-SOIC surface-mount packages with identical 0.154" (3.90mm) width specification, ensuring direct PCB footprint compatibility without layout modifications.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All parts are RoHS3 compliant and REACH unaffected, confirming regulatory compliance for EU and international markets. ECCN classification (EAR99) and HTSUS code (8542.31.0001) are identical across all parts.

Q: Which substitute part should be selected for maximum inventory availability?

A: TC648VOA offers the highest inventory level at 3117 units in stock, followed by TC646VOA at 2226 units. Both maintain unlimited moisture sensitivity (MSL 1) and full compliance certification.