NJM79L12UA-TE1 Equivalent & Substitute Parts

Part Overview

The NJM79L12UA-TE1 is a linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc., designed to provide a fixed negative output of -12V at 100mA. This device operates as a single-output negative regulator in a surface-mount SOT-89 package and includes integrated over-temperature and short-circuit protection features.

The NJM79L12UA-TE1 is classified as an obsolete product. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

NJM79L12UA-TE1

Nisshinbo Micro Devices Inc.In Stock: 1734NJM79L12UA-TE1 Datasheet

Current PartRFQ

L79L12ACUTR

STMicroelectronicsIn Stock: 29857L79L12ACUTR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NJM79L12UA-TE1 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Output configuration must be negative
• Output voltage must be fixed at -12V
• Output current capability must be 100mA or greater
• Maximum input voltage rating must be -35V or lower (more negative)
• Protection features must include over-temperature and short-circuit protection

Mechanical Compatibility Requirements:

• Package type must be TO-243AA (SOT-89)
• Mounting type must be surface mount

Regulatory Compliance:

• RoHS compliance status must be maintained
• REACH compliance status must be maintained

The L79L12ACUTR manufactured by STMicroelectronics meets all electrical and mechanical compatibility criteria and maintains equivalent regulatory compliance.

Parameter Comparison

Engineering Selection Recommendations

The L79L12ACUTR is a direct functional equivalent to the NJM79L12UA-TE1 for applications requiring a -12V, 100mA negative linear voltage regulator in a surface-mount SOT-89 package.

Product Status Consideration: The NJM79L12UA-TE1 is obsolete, while the L79L12ACUTR is active. Selection of the L79L12ACUTR ensures access to current manufacturing inventory and ongoing supplier support.

Compliance Status: Both parts maintain RoHS and REACH compliance. The L79L12ACUTR carries ROHS3 certification, representing the current RoHS standard revision.

Electrical Performance: Both regulators provide identical output voltage (-12V) and current capacity (100mA) with equivalent maximum input voltage ratings (-35V). The L79L12ACUTR exhibits lower quiescent current (6 mA versus 6.5 mA), resulting in marginally improved power efficiency. The NJM79L12UA-TE1 provides higher power supply rejection ratio (64dB versus 42dB at 120Hz).

Operating Temperature Range: The L79L12ACUTR operates across a wider temperature range (0°C to 125°C) compared to the NJM79L12UA-TE1 (-40°C to 85°C). Applications requiring operation below 0°C must retain the original NJM79L12UA-TE1 specification.

Frequently Asked Questions (FAQ)

Q: Can the L79L12ACUTR directly replace the NJM79L12UA-TE1 in existing designs?

A: Yes, for applications operating within the 0°C to 125°C temperature range. Both regulators share identical electrical specifications for output voltage (-12V), output current (100mA), and maximum input voltage (-35V). The TO-243AA package and SOT-89 pinout are mechanically compatible. Applications requiring operation below 0°C must use the original NJM79L12UA-TE1.

Q: What are the key differences between these two regulators?

A: The primary differences are: (1) Product status—NJM79L12UA-TE1 is obsolete; L79L12ACUTR is active; (2) Quiescent current—L79L12ACUTR draws 6 mA versus 6.5 mA; (3) PSRR—NJM79L12UA-TE1 provides 64dB versus 42dB; (4) Operating temperature range—L79L12ACUTR operates 0°C to 125°C versus -40°C to 85°C. All other electrical and mechanical parameters are equivalent.

Q: Are there any package or pinout differences?

A: Both parts use the TO-243AA package with SOT-89 pinout configuration. The supplier device package designation differs slightly (SOT-89 versus SOT-89-3), but this reflects manufacturer nomenclature and does not affect physical compatibility or pin assignment.

Q: What compliance certifications apply to both parts?

A: Both the NJM79L12UA-TE1 and L79L12ACUTR are RoHS compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level). The L79L12ACUTR carries ROHS3 certification, representing the current RoHS standard.

Q: Which regulator should be selected for new designs?

A: The L79L12ACUTR should be selected for new designs. It is an active product with current manufacturing support, maintains full regulatory compliance, and provides equivalent electrical performance across the standard industrial temperature range (0°C to 125°C).