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LM140LAH-15/NOPB Equivalent & Substitute Parts
Part Overview
The LM140LAH-15/NOPB is a linear voltage regulator IC manufactured by Texas Instruments, designed to provide a fixed positive 15V output at 100mA. This through-hole component operates across an extended temperature range of -55°C to 125°C and includes integrated protection features for over-temperature and short-circuit conditions. The part is currently active in production and maintains full RoHS3 compliance. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and access to alternative inventory sources when the primary part becomes unavailable.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | LM140LAH-15/NOPB |
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Output Configuration | Positive |
| Output Type | Fixed |
| Voltage - Output (Min/Fixed) | 15V |
| Voltage - Input (Max) | 35V |
| Current - Output | 100mA |
| Voltage Dropout (Max) | 2V @ 1A |
| Operating Temperature | -55°C ~ 125°C |
| Package / Case | TO-205AD, TO-39-3 Metal Can |
| Mounting Type | Through Hole |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitute parts for the LM140LAH-15/NOPB are identified based on strict parametric equivalence across the following critical criteria:
- Fixed positive output voltage of 15V
- Output current capability of 100mA
- Maximum input voltage of 35V
- Voltage dropout specification of 2V @ 1A
- Extended operating temperature range of -55°C to 125°C
- Through-hole mounting in TO-39-3 metal can package
- Positive output configuration with single regulator topology
- Over-temperature and short-circuit protection features
The LM140LAH-15 from National Semiconductor meets all specified electrical and mechanical parameters, establishing it as a parametric equivalent suitable for direct substitution in applications requiring the LM140LAH-15/NOPB.
Parameter Comparison
| Parameter | LM140LAH-15/NOPB (Texas Instruments) | LM140LAH-15 (National Semiconductor) |
|---|---|---|
| Output Configuration | Positive | Positive |
| Output Type | Fixed | Fixed |
| Voltage - Output (Min/Fixed) | 15V | 15V |
| Voltage - Input (Max) | 35V | 35V |
| Current - Output | 100mA | 100mA |
| Voltage Dropout (Max) | 2V @ 1A | 2V @ 1A |
| Current - Quiescent (Iq) | 3 mA | 3 mA |
| PSRR | 72dB (120Hz) | 72dB (120Hz) |
| Protection Features | Over Temperature, Short Circuit | Over Temperature, Short Circuit |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Package / Case | TO-205AD, TO-39-3 Metal Can | TO-205AD, TO-39-3 Metal Can |
| Mounting Type | Through Hole | Through Hole |
| Product Status | Active | Active |
| ECCN | EAR99 | EAR99 |
| HTSUS | 8542.39.0001 | 8542.39.0001 |
Engineering Selection Recommendations
Both the LM140LAH-15/NOPB and LM140LAH-15 are active products with identical electrical specifications and mechanical packaging. Selection between these parts should be based on inventory availability and supply chain requirements. The LM140LAH-15 from National Semiconductor provides equivalent performance and compliance characteristics, making it suitable for direct substitution in applications currently specified for the Texas Instruments LM140LAH-15/NOPB. Both parts maintain RoHS3 compliance and are classified under the same export control category (EAR99), ensuring regulatory consistency across design implementations.
Frequently Asked Questions (FAQ)
Q: Can the LM140LAH-15 from National Semiconductor be used as a direct replacement for the LM140LAH-15/NOPB?
A: Yes. Both parts share identical electrical parameters, including 15V fixed output, 100mA current capability, 35V maximum input voltage, and -55°C to 125°C operating temperature range. Both are packaged in TO-39-3 metal can through-hole format with equivalent protection features.
Q: Are there any package or pinout differences between these parts?
A: No. Both parts use the TO-205AD and TO-39-3 metal can package with identical through-hole mounting specifications.
Q: What are the critical parameters that define substitution eligibility?
A: Substitution eligibility is determined by matching output voltage (15V fixed), output current (100mA), maximum input voltage (35V), voltage dropout (2V @ 1A), operating temperature range (-55°C to 125°C), package type (TO-39-3), and protection features (over-temperature and short-circuit).
Q: Do both parts have the same compliance certifications?
A: Yes. Both parts are RoHS3 compliant, classified under ECCN EAR99, and assigned the same HTSUS code (8542.39.0001).
Q: Can these parts be used interchangeably in PCB designs?
A: Yes. Identical package specifications and pin configurations allow direct PCB substitution without layout modifications.
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