UC3625Q Equivalent & Substitute Parts

Part Overview

The UC3625Q is a motor driver IC from Texas Instruments designed for brushless DC (BLDC) motor control applications. It functions as a commutation and direction management controller with a pre-driver half-bridge output configuration, operating across a 10V to 18V supply voltage range. The device is packaged in a 28-PLCC (J-Lead) surface mount package.

The UC3625Q has reached obsolete product status. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this motor driver functionality.

Substiute Parts

UC3625Q

Texas InstrumentsIn Stock: 2705UC3625Q Datasheet

Current PartRFQ

UC3625DW

Texas InstrumentsIn Stock: 5062UC3625DW Datasheet

MFR RecommendedRFQ

UC3625DWTR

Texas InstrumentsIn Stock: 3867UC3625DWTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UC3625Q are identified based on strict electrical and mechanical compatibility criteria. The following parameters determine valid substitution:

• Base product number: UC3625 (same silicon die)
• Motor control function: Commutation and direction management for BLDC motors
• Output configuration: Pre-driver half-bridge (3-phase)
• Supply voltage range: 10V ~ 18V
• Interface type: Parallel
• Technology platform: Power MOSFET and Power Darlington
• Operating temperature range: 0°C ~ 70°C (TJ)
• Compliance standards: ROHS3 and REACH requirements

The UC3625Q differs from its substitutes only in package type. The main part uses a 28-PLCC (J-Lead) package, while substitute parts are available in 28-SOIC packaging. Both packages maintain identical electrical functionality and pin configuration compatibility through appropriate PCB layout adaptation.

Parameter Comparison

Engineering Selection Recommendations

Both UC3625DW and UC3625DWTR are active product variants suitable for replacing the obsolete UC3625Q. Selection between these substitutes is based on the following criteria:

UC3625DW is supplied in tube packaging and maintains active product status with full manufacturer support. UC3625DWTR is the tape-and-reel variant of the same silicon, also maintaining active status. Both parts share identical electrical specifications and functional characteristics.

The primary design consideration is PCB layout adaptation to accommodate the transition from 28-PLCC (J-Lead) to 28-SOIC packaging. The SOIC package has a smaller footprint and different pin spacing compared to the PLCC package. PCB redesign is required to accommodate the new package geometry.

Both substitute parts offer improved moisture sensitivity levels (MSL 2 versus MSL 3), providing enhanced reliability in storage and handling conditions compared to the original UC3625Q.

Frequently Asked Questions (FAQ)

Q: Can UC3625DW or UC3625DWTR be used as direct pin-for-pin replacements for UC3625Q?

A: The parts share identical electrical functionality and pin configuration. However, they require PCB layout modification due to package geometry differences. The UC3625Q uses 28-PLCC (J-Lead) packaging, while substitutes use 28-SOIC packaging with different footprints and pin spacing.

Q: What are the key differences between UC3625DW and UC3625DWTR?

A: Both parts are electrically identical variants of the UC3625 base product. The primary difference is packaging format: UC3625DW is supplied in tube packaging, while UC3625DWTR is supplied in tape-and-reel format. Selection depends on assembly process requirements and volume considerations.

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

A: All three parts maintain ROHS3 compliance and REACH unaffected status. The substitute parts offer improved moisture sensitivity levels (MSL 2 versus MSL 3 for the original), providing better protection during storage and handling.

Q: What design changes are necessary when transitioning from UC3625Q to UC3625DW or UC3625DWTR?

A: PCB layout modification is required to accommodate the 28-SOIC package footprint. Pin configuration remains identical, so schematic connections do not change. Thermal management and trace routing may require adjustment based on the new package dimensions.

Q: Are UC3625DW and UC3625DWTR available in sufficient quantities?

A: Both substitute parts maintain active product status with documented inventory availability. UC3625DW has 5016 units in stock, and UC3625DWTR has 3820 units in stock, supporting both prototype and production volume requirements.