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BU4334FVE-TR Equivalent & Substitute Parts
Part Overview
The BU4334FVE-TR is a supervisor integrated circuit from Rohm Semiconductor designed for power management applications. It functions as a simple reset/power-on reset controller with push-pull, totem pole output configuration, monitoring a single voltage channel at 3.4V threshold. The device operates across the industrial temperature range of -40°C to 125°C and is packaged in a 5-VSOF surface mount package.
The BU4334FVE-TR carries an obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this supervisor IC.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | BU4334FVE-TR |
| Manufacturer | Rohm Semiconductor |
| Category | Power Management (PMIC) |
| Type | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 |
| Voltage - Threshold | 3.4V |
| Output Configuration | Push-Pull, Totem Pole |
| Reset Logic | Active Low |
| Reset Timeout | Adjustable/Selectable |
| Operating Temperature Range | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount |
| Package / Case | SOT-665 |
| Supplier Device Package | 5-VSOF |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution eligibility for the BU4334FVE-TR is determined by strict alignment of the following core electrical and mechanical parameters:
- Functional Type: Simple Reset/Power-On Reset supervisor IC
- Voltage Monitoring Channels: Single channel (1)
- Voltage Threshold: 3.4V
- Output Configuration: Push-Pull, Totem Pole
- Reset Logic: Active Low
- Reset Timeout: Adjustable/Selectable
- Operating Temperature Range: -40°C ~ 125°C (TA)
- Mounting Type: Surface Mount
- Base Product Number: BU4334
- Regulatory Compliance: ROHS3 Compliant, REACH Unaffected
The BU4334G-TR qualifies as a manufacturer-recommended substitute because it maintains identical electrical specifications and functional characteristics while differing only in package form factor (5-SSOP versus 5-VSOF) and product status (Active versus Obsolete).
Parameter Comparison
| Parameter | BU4334FVE-TR (Main Part) | BU4334G-TR (Substitute) |
|---|---|---|
| Manufacturer | Rohm Semiconductor | Rohm Semiconductor |
| Category | Power Management (PMIC) | Power Management (PMIC) |
| Type | Simple Reset/Power-On Reset | Simple Reset/Power-On Reset |
| Number of Voltages Monitored | 1 | 1 |
| Voltage - Threshold | 3.4V | 3.4V |
| Output Configuration | Push-Pull, Totem Pole | Push-Pull, Totem Pole |
| Reset Logic | Active Low | Active Low |
| Reset Timeout | Adjustable/Selectable | Adjustable/Selectable |
| Operating Temperature Range | -40°C ~ 125°C (TA) | -40°C ~ 125°C (TA) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | SOT-665 | SC-74A, SOT-753 |
| Supplier Device Package | 5-VSOF | 5-SSOP |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The BU4334G-TR is the manufacturer-recommended substitute for the obsolete BU4334FVE-TR. Both parts maintain identical electrical specifications, functional behavior, and regulatory compliance status (ROHS3 Compliant, REACH Unaffected).
The primary difference is package form factor: the main part uses 5-VSOF (SOT-665), while the substitute uses 5-SSOP (SC-74A, SOT-753). Both are surface mount packages with equivalent pin counts and electrical connectivity. The substitute carries Active product status, ensuring ongoing availability and supply chain support.
Selection of the BU4334G-TR requires PCB layout modification to accommodate the different package footprint. No electrical redesign is necessary.
Frequently Asked Questions (FAQ)
Q: Can the BU4334G-TR directly replace the BU4334FVE-TR without circuit modification?
A: Electrical substitution is direct. The parts are functionally identical with matching voltage thresholds, output configurations, and operating parameters. However, PCB layout modification is required due to different package footprints (5-VSOF versus 5-SSOP).
Q: What is the primary reason for seeking a substitute for the BU4334FVE-TR?
A: The BU4334FVE-TR carries obsolete product status. The BU4334G-TR is an active product from the same manufacturer with identical electrical specifications, ensuring long-term availability and supply continuity.
Q: Are there any compliance or regulatory differences between these parts?
A: No. Both parts are ROHS3 Compliant, REACH Unaffected, and carry identical regulatory certifications. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for both.
Q: What package considerations apply when switching from BU4334FVE-TR to BU4334G-TR?
A: The main part uses SOT-665 (5-VSOF) packaging, while the substitute uses SC-74A or SOT-753 (5-SSOP) packaging. Both are 5-pin surface mount packages. PCB footprint and land pattern must be updated to match the substitute package geometry.
Q: Do the operating temperature ranges differ between these parts?
A: No. Both parts operate across -40°C to 125°C (TA), supporting identical industrial temperature applications.
Q: Is the BU4334G-TR available in tape and reel packaging?
A: Yes. The BU4334G-TR is supplied in Tape & Reel (TR) format, suitable for automated assembly processes.
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