UCC28085P Equivalent & Substitute Parts

Part Overview

The UCC28085P is an offline switch controller IC manufactured by Texas Instruments, designed for push-pull converter topologies operating in the 50kHz to 1MHz frequency range. This device provides isolated output control with integrated current limiting and frequency control features, suitable for offline power supply applications requiring push-pull transformer configurations.

The UCC28085P is classified as Obsolete, making it necessary to identify equivalent and substitute parts for new designs or production continuity. Substitute parts maintain functional equivalence while offering alternative packaging options or improved product status for long-term availability.

Substiute Parts

UCC28085P

Texas InstrumentsIn Stock: 3441UCC28085P Datasheet

Current PartRFQ

UCC28085D

Texas InstrumentsIn Stock: 882UCC28085D Datasheet

MFR RecommendedRFQ

UCC28083P

Texas InstrumentsIn Stock: 3265UCC28083P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the UCC28085P is determined by strict equivalence across the following critical parameters:

Functional Equivalence Parameters:

• Topology: Push-Pull
• Frequency - Switching: 50kHz ~ 1MHz
• Voltage - Supply (Vcc/Vdd): 8.3V ~ 15V
• Voltage - Start Up: 12.5 V
• Duty Cycle: 49%
• Output Isolation: Isolated
• Fault Protection: Current Limiting
• Control Features: Frequency Control
• Operating Temperature: -40°C ~ 85°C (TA)

Packaging Variants: The UCC28085P is available in two package options: 8-PDIP (through-hole) and 8-SOIC (surface mount). Both variants maintain identical electrical specifications and are interchangeable at the functional level, with selection determined by PCB assembly requirements.

Base Product Equivalence: The UCC28083P shares identical electrical specifications with the UCC28085P, differing only in internal design revision. Both are classified as Obsolete and maintain the same functional parameters, making them parametric equivalents suitable for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

UCC28085D (MFR Recommended Substitute): The UCC28085D is the manufacturer-recommended substitute for the UCC28085P. It maintains complete electrical equivalence across all functional parameters while offering surface-mount packaging (8-SOIC). This variant is classified as Last Time Buy, providing extended availability compared to the Obsolete status of the UCC28085P. Selection of the UCC28085D is appropriate for new designs utilizing surface-mount assembly processes. Both parts carry ROHS3 compliance and identical MSL ratings.

UCC28083P (Parametric Equivalent): The UCC28083P is a parametric equivalent offering identical electrical specifications and through-hole packaging (8-DIP) matching the UCC28085P form factor. This part is also classified as Obsolete. The UCC28083P is suitable for applications requiring pin-compatible replacement in existing through-hole PCB designs. Compliance certifications and environmental ratings are equivalent to the main part.

Packaging Consideration: Selection between through-hole (8-DIP) and surface-mount (8-SOIC) variants depends solely on PCB assembly methodology and board layout requirements. Electrical performance is identical across packaging options.

Frequently Asked Questions (FAQ)

Q: Can the UCC28085D replace the UCC28085P in existing designs? A: Yes. The UCC28085D maintains complete electrical equivalence with the UCC28085P. The primary difference is packaging: UCC28085D uses 8-SOIC surface-mount while UCC28085P uses 8-DIP through-hole. PCB layout and assembly process compatibility must be confirmed.

Q: What is the difference between UCC28085P and UCC28083P? A: Both parts are parametric equivalents with identical electrical specifications, operating ranges, and functional features. The difference is in the internal design revision (base product number). Both are classified as Obsolete. Selection between them is based on packaging preference and PCB assembly requirements, as both are available in 8-DIP through-hole configuration.

Q: Why is the UCC28085P classified as Obsolete? A: Obsolete status indicates the part is no longer in active production. The UCC28085D (Last Time Buy status) is the manufacturer-recommended path forward for new designs, offering extended availability during the transition period.

Q: Are all three parts ROHS3 compliant? A: Yes. The UCC28085P, UCC28085D, and UCC28083P are all ROHS3 compliant with MSL rating of 1 (Unlimited), meeting current environmental and regulatory requirements.

Q: Can I use the UCC28085D in a through-hole PCB design? A: No. The UCC28085D is surface-mount only (8-SOIC package). For through-hole applications, use the UCC28085P or UCC28083P (both 8-DIP). Adapter boards or PCB redesign would be required to use surface-mount variants in through-hole designs.

Q: What are the key parameters that determine substitutability? A: Substitutability is determined by equivalence in topology (Push-Pull), switching frequency range (50kHz ~ 1MHz), supply voltage (8.3V ~ 15V), duty cycle (49%), output isolation, fault protection (Current Limiting), and control features (Frequency Control). All three parts meet these criteria.