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REF02AU/2K5E4 Equivalent & Substitute Parts
Part Overview
The REF02AU/2K5E4 is a Series Voltage Reference IC manufactured by Texas Instruments, designed to provide a fixed 5V output with ±0.3% tolerance across a wide input supply range of 8V to 40V. This component operates as a precision voltage reference in power management applications, delivering 21 mA output current with low noise characteristics and a temperature coefficient of 15ppm/°C.
The REF02AU/2K5E4 carries an Obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems utilizing this reference voltage IC.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Output Voltage (Fixed) | 5V |
| Output Current | 21 mA |
| Voltage Tolerance | ±0.3% |
| Temperature Coefficient | 15ppm/°C |
| Input Voltage Range | 8V ~ 40V |
| Supply Current | 1.4mA |
| Noise (0.1Hz to 10Hz) | 4µVp-p |
| Operating Temperature | -40°C ~ 85°C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution of the REF02AU/2K5E4 is determined by strict equivalence across the following critical parameters:
Primary Substitution Criteria:
- Fixed output voltage of 5V
- Output current capability of 21 mA
- Voltage tolerance of ±0.3%
- Temperature coefficient of 15ppm/°C
- Input voltage range of 8V ~ 40V
- Supply current of 1.4mA
- Noise specification of 4µVp-p (0.1Hz to 10Hz)
- Operating temperature range of -40°C ~ 85°C
- 8-SOIC surface mount package
- ROHS3 compliance and MSL 3 rating
The REF02AU/2K5E4 is directly substitutable with REF02AU/2K5, which maintains identical electrical specifications and packaging. The REF02AU/2K5 differs only in product status (Active versus Obsolete) and packaging format (Cut Tape and Digi-Reel options versus standard packaging).
Parameter Comparison
| Parameter | REF02AU/2K5E4 | REF02AU/2K5 |
|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments |
| Category | Power Management (PMIC) | Power Management (PMIC) |
| Reference Type | Series | Series |
| Output Type | Fixed | Fixed |
| Output Voltage | 5V | 5V |
| Output Current | 21 mA | 21 mA |
| Tolerance | ±0.3% | ±0.3% |
| Temperature Coefficient | 15ppm/°C | 15ppm/°C |
| Noise (0.1Hz to 10Hz) | 4µVp-p | 4µVp-p |
| Input Voltage Range | 8V ~ 40V | 8V ~ 40V |
| Supply Current | 1.4mA | 1.4mA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) | 3 (168 Hours) |
Engineering Selection Recommendations
The REF02AU/2K5 is the primary substitute for the obsolete REF02AU/2K5E4. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications across all critical parameters. The REF02AU/2K5 carries Active product status, ensuring continued availability and supply chain support.
Both parts comply with ROHS3 requirements and carry MSL 3 ratings, making them suitable for standard surface mount assembly processes. The transition from REF02AU/2K5E4 to REF02AU/2K5 requires no circuit redesign or board layout modifications, as the 8-SOIC package footprint and pin configuration remain unchanged.
For applications requiring extended component availability and supply continuity, the REF02AU/2K5 in Cut Tape or Digi-Reel packaging formats provides enhanced procurement flexibility compared to the obsolete REF02AU/2K5E4.
Frequently Asked Questions (FAQ)
Q: Can REF02AU/2K5 directly replace REF02AU/2K5E4 in existing designs?
A: Yes. The REF02AU/2K5 is a direct electrical and mechanical equivalent. All output voltage, current, tolerance, temperature coefficient, noise, and input voltage specifications are identical. The 8-SOIC package footprint and pin configuration match exactly, requiring no circuit or PCB modifications.
Q: What is the primary difference between REF02AU/2K5E4 and REF02AU/2K5?
A: The REF02AU/2K5E4 is classified as Obsolete, while REF02AU/2K5 maintains Active product status. Both parts are electrically and mechanically identical. The REF02AU/2K5 offers improved supply chain availability and packaging options (Cut Tape and Digi-Reel formats).
Q: Are there any compliance or certification differences between these parts?
A: No. Both REF02AU/2K5E4 and REF02AU/2K5 carry identical ROHS3 compliance and MSL 3 ratings. Both are suitable for standard surface mount assembly processes without additional handling requirements.
Q: What packaging formats are available for the substitute part?
A: The REF02AU/2K5 is available in Cut Tape (CT) and Digi-Reel packaging formats, providing flexibility for both prototype and production volume requirements.
Q: Does the substitute part require any circuit design changes?
A: No. The REF02AU/2K5 maintains identical electrical specifications, including 5V fixed output, 21 mA output current, ±0.3% tolerance, 15ppm/°C temperature coefficient, and 8V to 40V input voltage range. No circuit modifications are necessary.
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