UC3901DW Equivalent & Substitute Parts

Part Overview

The UC3901DW is an isolated feedback generator PMIC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as Last Time Buy, indicating end-of-life status. The UC3901DW operates across a 4.5V to 40V supply voltage range with a 5mA supply current requirement and supports operating temperatures from 0°C to 70°C. As a Last Time Buy product, identifying equivalent substitute parts is essential for design continuity and long-term supply chain planning.

Substiute Parts

UC3901DW

Texas InstrumentsIn Stock: 7652UC3901DW Datasheet

Current PartRFQ

UC2901DTR

Texas InstrumentsIn Stock: 6858UC2901DTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The UC2901DTR qualifies as a manufacturer-recommended substitute based on the following criteria:

Electrical Compatibility: Both parts maintain identical supply current (5mA) and supply voltage range (4.5V ~ 40V), ensuring functional equivalence in power management applications.

Functional Alignment: Both components serve the feedback generator application within the Power Management (PMIC) category.

Compliance & Certification: Both parts are ROHS3 compliant, REACH unaffected, and share identical moisture sensitivity levels (MSL 2, 1 Year), ensuring regulatory and environmental compatibility.

Mounting & Assembly: Both utilize surface mount technology, maintaining assembly process compatibility.

Package Consideration: The UC2901DTR uses a 14-SOIC package (0.154", 3.90mm Width) compared to the UC3901DW's 16-SOIC package (0.295", 7.50mm Width). This represents a package footprint change that requires PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

The UC2901DTR is the manufacturer-recommended substitute for the UC3901DW. Selection of this substitute is supported by:

Product Status Alignment: The UC2901DTR maintains Active product status, ensuring continued availability and manufacturer support, whereas the UC3901DW is Last Time Buy.

Regulatory Compliance: Both parts maintain identical ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.

Electrical Equivalence: Matching supply current and voltage specifications ensure direct functional replacement in feedback generator applications.

Temperature Range Extension: The UC2901DTR provides an extended operating temperature range (-40°C ~ 85°C) compared to the UC3901DW (0°C ~ 70°C), offering broader operational capability.

Package Transition: PCB layout modification is required due to the package footprint change from 16-SOIC to 14-SOIC. This transition necessitates design review and layout verification prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can the UC2901DTR directly replace the UC3901DW without design changes?

A: Electrical and functional compatibility is confirmed. However, the package footprint differs (16-SOIC versus 14-SOIC), requiring PCB layout modification and verification.

Q: What are the key electrical parameters that define substitution eligibility?

A: Supply current (5mA), supply voltage range (4.5V ~ 40V), and feedback generator application functionality are the primary electrical criteria. Both parts match these specifications.

Q: Does the UC2901DTR support the same operating temperature range as the UC3901DW?

A: The UC2901DTR supports an extended range (-40°C ~ 85°C) compared to the UC3901DW (0°C ~ 70°C). This provides broader operational capability for temperature-sensitive applications.

Q: Are there compliance differences between these parts?

A: Both parts are ROHS3 compliant and REACH unaffected with identical moisture sensitivity levels (MSL 2, 1 Year). No compliance differences exist.

Q: What packaging format differences should be considered?

A: The UC3901DW is supplied in Tube packaging, while the UC2901DTR is supplied in Tape & Reel (TR) format. This affects procurement and assembly processes but does not impact component functionality.

Q: Why is the UC3901DW classified as Last Time Buy?

A: Last Time Buy status indicates end-of-life designation. The UC2901DTR's Active status ensures continued availability for new designs and ongoing production requirements.