REF02BU/2K5E4 Equivalent & Substitute Parts

Part Overview

The REF02BU/2K5E4 is a Series Voltage Reference IC manufactured by Texas Instruments, designed for power management applications requiring a fixed 5V output with high precision. This component delivers 21 mA output current with ±0.2% tolerance and operates across a wide input voltage range of 8V to 40V. The part is classified as Obsolete, which necessitates identification of active equivalent alternatives to ensure continued design support and procurement availability for new production runs and field replacements.

Substiute Parts

REF02BU/2K5E4

Texas InstrumentsIn Stock: 15661REF02BU/2K5E4 Datasheet

Current PartRFQ

REF02BU/2K5

Texas InstrumentsIn Stock: 19099REF02BU/2K5 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the REF02BU/2K5E4 is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Fixed output voltage of 5V
• Output current capability of 21 mA
• Tolerance specification of ±0.2%
• Temperature coefficient of 10 ppm/°C
• Input voltage range of 8V ~ 40V
• Supply current of 1.4 mA
• Operating temperature range of -40°C ~ 85°C

Mechanical Equivalence Criteria:

• Surface Mount mounting type
• 8-SOIC package with 0.154" (3.90mm) width
• Pin-compatible footprint

Compliance Equivalence Criteria:

• ROHS3 Compliant status
• Moisture Sensitivity Level 3 (168 Hours)
• REACH Unaffected status

The REF02BU/2K5 qualifies as a parametric equivalent substitute because it maintains identical electrical specifications, mechanical packaging, and regulatory compliance across all provided parameters.

Parameter Comparison

Engineering Selection Recommendations

The REF02BU/2K5 is the direct substitute for the obsolete REF02BU/2K5E4. Selection of this substitute is based on the following engineering factors:

Product Status Transition: The main part REF02BU/2K5E4 carries Obsolete status, indicating end-of-life designation. The substitute REF02BU/2K5 maintains Active product status, ensuring ongoing manufacturer support, continued availability, and compliance with current production standards.

Electrical Specification Equivalence: All electrical parameters are identical between the main part and substitute, including output voltage, current capacity, tolerance, temperature coefficient, noise characteristics, input voltage range, and operating temperature specifications. This ensures direct functional replacement without circuit redesign.

Mechanical and Package Compatibility: Both parts utilize identical 8-SOIC surface mount packaging with matching footprint dimensions (0.154", 3.90mm width), enabling direct PCB layout compatibility and eliminating the need for board redesign.

Regulatory and Compliance Alignment: Both parts maintain ROHS3 Compliant status, identical Moisture Sensitivity Level 3 (168 Hours), and REACH Unaffected designation, ensuring compliance with current environmental and regulatory requirements.

Procurement Advantage: The substitute part demonstrates higher inventory availability (19,050 Pcs in stock versus 15,600 Pcs for the main part), supporting reliable supply chain continuity for production and field service applications.

Frequently Asked Questions (FAQ)

Q: Can REF02BU/2K5 be used as a direct replacement for REF02BU/2K5E4 without circuit modifications?

A: Yes. The REF02BU/2K5 is electrically and mechanically equivalent to the REF02BU/2K5E4 across all specified parameters. No circuit modifications are required. The substitute maintains identical output voltage (5V), output current (21 mA), tolerance (±0.2%), temperature coefficient (10 ppm/°C), input voltage range (8V ~ 40V), and operating temperature range (-40°C ~ 85°C). The 8-SOIC package footprint is identical, enabling direct PCB compatibility.

Q: What is the difference between REF02BU/2K5E4 and REF02BU/2K5?

A: The primary difference is product status. REF02BU/2K5E4 is classified as Obsolete, while REF02BU/2K5 is Active. All electrical specifications, mechanical packaging, and compliance certifications are identical. The packaging designation differs (REF02BU/2K5E4 uses standard packaging versus REF02BU/2K5 available in Cut Tape and Digi-Reel formats), but the die and electrical performance are equivalent.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts maintain identical ROHS3 Compliant status, Moisture Sensitivity Level 3 (168 Hours), REACH Unaffected designation, and equivalent ECCN and HTSUS classifications. Regulatory compliance is maintained across both parts.

Q: What packaging options are available for the substitute part?

A: The REF02BU/2K5 substitute is available in Cut Tape (CT) and Digi-Reel packaging formats, providing flexibility for both manual assembly and automated production environments. The physical component and electrical specifications remain identical across all packaging options.

Q: Is the substitute part suitable for the same temperature range applications?

A: Yes. The REF02BU/2K5 maintains the identical operating temperature range of -40°C ~ 85°C (TA) as the main part, ensuring compatibility with applications across the full specified temperature spectrum.

Q: What is the inventory status for the substitute part?

A: The REF02BU/2K5 substitute maintains higher inventory availability at 19,050 Pcs in stock, compared to 15,600 Pcs for the obsolete main part. This supports reliable procurement for both new production and field replacement applications.