BU4941F-TR Equivalent & Substitute Parts

Part Overview

The BU4941F-TR is a supervisor integrated circuit from Rohm Semiconductor designed for power management applications. It functions as a simple reset/power-on reset device with push-pull, totem pole output configuration, monitoring a single voltage threshold at 4.1V. The device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements.

Substiute Parts

BU4941F-TR

Rohm SemiconductorIn Stock: 1006BU4941F-TR Datasheet

Current PartRFQ

BU4941G-TR

Rohm SemiconductorIn Stock: 1054BU4941G-TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BU4941F-TR is determined by equivalence across the following critical parameters:

• Functional Type: Simple Reset/Power-On Reset supervisor
• Voltage Monitoring: Single channel at 4.1V threshold
• Output Stage: Push-Pull, Totem Pole configuration
• Reset Polarity: Active High
• Operating Temperature: -40°C to 125°C
• Compliance: ROHS3 Compliant, REACH Unaffected
• Manufacturer: Rohm Semiconductor (same product family)

The BU4941G-TR qualifies as a direct substitute based on matching all functional and electrical parameters. The primary difference is the package type: BU4941F-TR uses 4-SOP (SC-82), while BU4941G-TR uses 5-SSOP (SC-74A, SOT-753). Both packages are surface mount configurations suitable for equivalent circuit board integration.

Parameter Comparison

Engineering Selection Recommendations

The BU4941G-TR is the manufacturer-recommended substitute for the obsolete BU4941F-TR. Both devices maintain identical electrical specifications, functional behavior, and compliance certifications. The transition from 4-SOP to 5-SSOP packaging requires PCB layout modification but does not affect circuit functionality or performance.

Selection of BU4941G-TR is supported by:

• Active product status with ongoing manufacturer support
• Identical voltage threshold and reset characteristics
• Matching operating temperature range and environmental compliance
• ROHS3 and REACH compliance maintained
• Same base product family (BU4941) ensuring design continuity

Frequently Asked Questions (FAQ)

Q: Can BU4941G-TR directly replace BU4941F-TR without circuit modification?

A: Electrical and functional replacement is direct. PCB layout modification is required due to package change from 4-SOP to 5-SSOP. Pin configuration differs between packages and must be verified against device datasheets.

Q: Are the voltage thresholds identical between these parts?

A: Yes. Both devices monitor a single voltage channel with a 4.1V threshold and provide identical reset output behavior.

Q: What is the primary reason for substitution?

A: BU4941F-TR is classified as obsolete. BU4941G-TR is the active equivalent from the same manufacturer and product family.

Q: Do both parts meet current compliance requirements?

A: Yes. Both BU4941F-TR and BU4941G-TR are ROHS3 Compliant and REACH Unaffected.

Q: Are there inventory considerations for this substitution?

A: BU4941G-TR has 944 pieces in stock (new original). Availability should be confirmed for production requirements.

Q: What is the difference between SC-82 and SC-74A packages?

A: SC-82 is a 4-pin SOP package used in BU4941F-TR. SC-74A (SOT-753) is a 5-pin SSOP package used in BU4941G-TR. Both are surface mount configurations with different pin counts and footprints.