UC3637Q Equivalent & Substitute Parts

Part Overview

The UC3637Q is a brushed DC motor driver IC manufactured by Texas Instruments, designed for general-purpose motor control applications. It operates across a 2.5V to 20V supply voltage range and provides commutation and direction management functions through a parallel interface. The device is packaged in a 20-PLCC (9x9) configuration for surface mount applications.

The UC3637Q is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for systems utilizing this motor driver architecture.

Substiute Parts

UC3637Q

Texas InstrumentsIn Stock: 1474UC3637Q Datasheet

Current PartRFQ

UC3637DWTR

Texas InstrumentsIn Stock: 4442UC3637DWTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UC3637Q is determined by strict alignment of the following electrical and mechanical parameters:

• Base product number (UC3637 series)
• Motor control function (brushed DC commutation and direction management)
• Output configuration (Pre-Driver - Half Bridge with 4 outputs)
• Interface type (parallel control)
• Supply voltage range (2.5V ~ 20V)
• Operating temperature range (0°C ~ 70°C)
• Compliance certifications (ROHS3, REACH Unaffected)

The UC3637DWTR qualifies as a direct substitute based on identical electrical specifications and functional architecture. The primary difference is packaging format: the UC3637Q uses 20-PLCC (J-Lead) while the UC3637DWTR uses 20-SOIC. Both packages are surface mount configurations with equivalent pin counts and signal assignments.

Parameter Comparison

Engineering Selection Recommendations

The UC3637DWTR is the manufacturer-recommended substitute for the UC3637Q. Both devices share identical electrical specifications, functional architecture, and compliance certifications (ROHS3 Compliant, REACH Unaffected). The UC3637DWTR maintains active product status with established supply chain availability, whereas the UC3637Q is obsolete.

Selection of the UC3637DWTR requires PCB layout modification to accommodate the 20-SOIC package footprint in place of the 20-PLCC footprint. Pin assignments remain functionally equivalent between packages. The substitute part is suitable for new designs and production continuity applications where the UC3637Q is no longer available.

Frequently Asked Questions (FAQ)

Q: Can the UC3637DWTR directly replace the UC3637Q without design changes?

A: The UC3637DWTR provides electrical and functional equivalence to the UC3637Q. However, the package change from 20-PLCC to 20-SOIC requires PCB footprint modification. Pin assignments are functionally equivalent, but physical layout must be updated.

Q: What is the primary difference between these two parts?

A: The UC3637Q uses a 20-PLCC (J-Lead) package, while the UC3637DWTR uses a 20-SOIC package. Electrical specifications, supply voltage range, operating temperature, and motor control functions are identical.

Q: Why is the UC3637Q classified as obsolete?

A: The UC3637Q has reached end-of-life status. The UC3637DWTR represents the active continuation of this product line with equivalent functionality in an alternative package format.

Q: Are there compliance or certification differences between these parts?

A: Both parts maintain identical compliance status: ROHS3 Compliant, REACH Unaffected, and MSL 2 (1 Year). No compliance differences exist between the two devices.

Q: What supply voltage range do these motor drivers support?

A: Both the UC3637Q and UC3637DWTR operate across a 2.5V to 20V supply voltage range, supporting general-purpose brushed DC motor control applications.

Q: Is the UC3637DWTR available in tape and reel packaging?

A: Yes, the UC3637DWTR is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.