UCC2889N Equivalent & Substitute Parts

Part Overview

The UCC2889N is an offline flyback converter controller manufactured by Texas Instruments, designed for non-isolated power supply applications. This 8-DIP through-hole component operates with a supply voltage range of 6.3V to 9.3V and includes integrated short-circuit fault protection. The UCC2889N is classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and procurement planning. Substitute parts must maintain identical electrical specifications and compatible packaging options to ensure direct replacement capability.

Substiute Parts

UCC2889N

Texas InstrumentsIn Stock: 3425UCC2889N Datasheet

Current PartRFQ

UCC2889D

UnitrodeIn Stock: 2615UCC2889D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC2889N is determined by strict equivalence across the following critical parameters:

• Topology: Flyback converter controller architecture
• Output Isolation: Non-isolated operation
• Voltage - Supply (Vcc/Vdd): 6.3V ~ 9.3V range
• Voltage - Start Up: 8.4 V threshold
• Fault Protection: Short circuit protection capability
• Operating Temperature: -40°C ~ 85°C range
• Base Product Number: UCC2889 series designation

The UCC2889D qualifies as a manufacturer-recommended substitute based on identical electrical specifications and base product lineage. The primary distinction is packaging format: the UCC2889N uses through-hole 8-DIP configuration, while the UCC2889D is available in surface-mount 8-SOIC format. Both variants maintain equivalent functional performance and electrical characteristics.

Parameter Comparison

Engineering Selection Recommendations

The UCC2889D is the manufacturer-recommended substitute for the obsolete UCC2889N. Both components share identical electrical specifications, including supply voltage range, startup voltage, fault protection, and operating temperature range. The UCC2889D maintains active product status, ensuring continued availability and supply chain reliability.

Selection between these variants depends on board-level design constraints:

• UCC2889N (Through-Hole 8-DIP): Suitable for through-hole PCB designs or legacy board layouts requiring DIP packaging.
• UCC2889D (Surface-Mount 8-SOIC): Appropriate for modern surface-mount assembly processes and space-constrained designs.

Both variants comply with ROHS3 standards and maintain equivalent functional performance. The UCC2889D is preferred for new designs due to its active product status and surface-mount compatibility with contemporary manufacturing processes.

Frequently Asked Questions (FAQ)

Q: Can the UCC2889D directly replace the UCC2889N in existing designs?

A: Electrical substitution is valid; both components share identical specifications for topology, supply voltage, startup voltage, fault protection, and operating temperature. However, packaging differs: UCC2889N is through-hole 8-DIP, while UCC2889D is surface-mount 8-SOIC. PCB layout modification is required for physical replacement.

Q: Why is the UCC2889N classified as obsolete?

A: The UCC2889N is an older through-hole DIP package variant. The UCC2889D surface-mount version represents the current active product line, reflecting industry transition toward surface-mount assembly technologies.

Q: Are there any compliance differences between UCC2889N and UCC2889D?

A: Both components are ROHS3 compliant and carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Compliance status is equivalent for regulatory purposes.

Q: What determines substitution eligibility for the UCC2889N?

A: Substitutes must maintain identical flyback topology, non-isolated output configuration, 6.3V–9.3V supply voltage range, 8.4V startup voltage, short-circuit fault protection, and -40°C to 85°C operating temperature range. Package format may vary based on PCB assembly requirements.

Q: Is the UCC2889D suitable for new product designs?

A: Yes. The UCC2889D is active product status and recommended by the manufacturer. Surface-mount 8-SOIC packaging aligns with current manufacturing standards and is preferred for new designs.