UCC3946NG4 Equivalent & Substitute Parts

Part Overview

The UCC3946NG4 is a supervisor integrated circuit designed for power management applications, specifically functioning as a simple reset/power-on reset device with push-pull, totem pole output configuration. This component monitors a single voltage threshold and provides active-low reset signaling with a 160ms minimum reset timeout. The UCC3946NG4 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

UCC3946NG4

Texas InstrumentsIn Stock: 1193UCC3946NG4 Datasheet

Current PartRFQ

UCC3946D

Texas InstrumentsIn Stock: 1281UCC3946D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC3946NG4 are identified based on functional equivalence across the following critical parameters:

• Functional Type: Simple Reset/Power-On Reset supervisor
• Voltage Monitoring: Single channel with adjustable/selectable threshold
• Output Type: Push-Pull, Totem Pole configuration
• Reset Behavior: Active Low reset with 160ms minimum timeout
• Operating Temperature: 0°C ~ 70°C range
• Electrical Compliance: ROHS3 Compliant, REACH Unaffected
• Base Product Number: UCC3946 series

The UCC3946D qualifies as a direct functional substitute, maintaining identical electrical specifications and operational characteristics while differing only in packaging format and mounting technology.

Parameter Comparison

Engineering Selection Recommendations

The UCC3946D is the recommended substitute for the obsolete UCC3946NG4. Both components share identical electrical specifications, functional behavior, and regulatory compliance status (ROHS3 Compliant, REACH Unaffected). The primary distinction is packaging format: the UCC3946NG4 uses through-hole 8-DIP mounting, while the UCC3946D employs surface-mount 8-SOIC technology.

Selection between these parts depends on board assembly methodology. Through-hole designs requiring the DIP package should source remaining UCC3946NG4 inventory. New designs or board revisions should adopt the UCC3946D, which offers active product status and modern surface-mount compatibility. Both parts maintain identical pin functionality and electrical performance, ensuring direct functional interchangeability when board layout accommodates the package transition.

Frequently Asked Questions (FAQ)

Q: Can the UCC3946D directly replace the UCC3946NG4 in existing designs?

A: Electrical and functional replacement is direct. Pin-to-pin compatibility is maintained. Physical board layout must accommodate the package difference: UCC3946NG4 uses 8-DIP through-hole mounting; UCC3946D uses 8-SOIC surface-mount technology. Board redesign or adapter solutions may be required for mechanical integration.

Q: What is the primary reason for substitution?

A: The UCC3946NG4 is classified as obsolete. The UCC3946D maintains identical electrical specifications and functional behavior while holding active product status, ensuring long-term availability and supply chain reliability.

Q: Are there differences in electrical performance between these parts?

A: No. Both components provide identical voltage monitoring, reset timeout (160ms minimum), output configuration (push-pull, totem pole), and operating temperature range (0°C ~ 70°C). Functional behavior is equivalent.

Q: What compliance certifications apply to both parts?

A: Both the UCC3946NG4 and UCC3946D are ROHS3 Compliant and REACH Unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.

Q: Does package selection affect circuit functionality?

A: No. The 8-DIP and 8-SOIC packages contain identical die and electrical specifications. Package selection is determined by board assembly technology and layout constraints, not functional requirements.