NJM79L24A Equivalent & Substitute Parts

Part Overview

The NJM79L24A is a linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc., designed to provide a fixed negative output of -24V at 100mA in a TO-92-3 through-hole package. This device functions as a negative fixed voltage regulator with integrated over-temperature and short-circuit protection features.

The NJM79L24A is classified as obsolete. Substitute parts are necessary to ensure continued availability for new designs, production continuity, and long-term system support. The onsemi MC79L24 series provides functionally equivalent alternatives with active product status and improved compliance certifications.

Substiute Parts

NJM79L24A

Nisshinbo Micro Devices Inc.In Stock: 2145NJM79L24A Datasheet

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MC79L24ABPG

onsemiIn Stock: 2718MC79L24ABPG Datasheet

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MC79L24ACPG

onsemiIn Stock: 2701MC79L24ACPG Datasheet

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MC79L24ACPRMG

onsemiIn Stock: 3125MC79L24ACPRMG Datasheet

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MC79L24ACPRPG

onsemiIn Stock: 14486MC79L24ACPRPG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJM79L24A is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

• Output Configuration: Negative (fixed)
• Output Voltage: -24V
• Output Current: 100mA minimum
• Maximum Input Voltage: -40V or greater
• Protection Features: Over Temperature and Short Circuit protection

Mechanical Equivalence Requirements:

• Package Type: TO-92-3 (TO-226-3) through-hole configuration
• Pin count and lead spacing compatibility

All four substitute parts (MC79L24ABPG, MC79L24ACPG, MC79L24ACPRMG, MC79L24ACPRPG) meet these equivalence criteria. Differences among substitutes relate to packaging format (Bulk vs. Cut Tape) and operating temperature ranges, not core electrical functionality.

Parameter Comparison

Engineering Selection Recommendations

For Active Product Status and Compliance:

All four onsemi MC79L24 variants (MC79L24ABPG, MC79L24ACPG, MC79L24ACPRMG, MC79L24ACPRPG) are classified as active products with ROHS3 compliance and REACH unaffected status. These characteristics make them suitable for new designs and production environments requiring current regulatory compliance.

Operating Temperature Considerations:

MC79L24ABPG supports the extended temperature range of -40°C ~ 125°C, matching the lower temperature limit of the obsolete NJM79L24A (-40°C ~ 85°C) while extending the upper limit. MC79L24ACPG, MC79L24ACPRMG, and MC79L24ACPRPG operate within 0°C ~ 125°C, which narrows the lower temperature range to 0°C.

Packaging Format Selection:

MC79L24ABPG and MC79L24ACPG are supplied in Bulk packaging. MC79L24ACPRMG and MC79L24ACPRPG are supplied in Cut Tape (CT) format with formed leads. Selection depends on assembly process requirements and inventory management practices.

Inventory Availability:

MC79L24ACPRPG offers the highest inventory level (14,400 pcs), followed by MC79L24ACPRMG (3,075 pcs), MC79L24ACPG (2,651 pcs), and MC79L24ABPG (2,608 pcs).

Frequently Asked Questions (FAQ)

Q: Can MC79L24 series parts directly replace NJM79L24A in existing designs?

A: Yes. All four MC79L24 variants provide electrical and mechanical equivalence. The TO-92-3 package pinout and electrical specifications are compatible. Verify operating temperature requirements for your application, as MC79L24ACPG, MC79L24ACPRMG, and MC79L24ACPRPG have a minimum operating temperature of 0°C rather than -40°C.

Q: What is the difference between MC79L24ABPG and MC79L24ACPG?

A: Both parts are electrically identical with identical electrical specifications. The primary difference is operating temperature range: MC79L24ABPG operates from -40°C to 125°C, while MC79L24ACPG operates from 0°C to 125°C. Both are supplied in Bulk packaging.

Q: What distinguishes the Cut Tape (CT) variants from Bulk variants?

A: MC79L24ACPRMG and MC79L24ACPRPG are supplied in Cut Tape format with formed leads, suitable for automated pick-and-place assembly. MC79L24ABPG and MC79L24ACPG are supplied in Bulk format. Electrical performance is identical across all variants.

Q: Are all MC79L24 substitutes RoHS compliant?

A: Yes. All four MC79L24 variants are ROHS3 compliant, whereas the NJM79L24A is RoHS non-compliant. This compliance improvement supports modern manufacturing and environmental regulations.

Q: Which substitute should I select for new production?

A: Selection depends on three factors: (1) Operating temperature requirement: choose MC79L24ABPG if -40°C minimum is required; (2) Assembly process: choose Cut Tape variants (MC79L24ACPRMG or MC79L24ACPRPG) for automated assembly or Bulk variants for manual assembly; (3) Inventory availability: MC79L24ACPRPG offers the highest stock level.

Q: Is the PSRR difference between NJM79L24A (55dB) and MC79L24 series (47dB) significant?

A: The 8dB difference in Power Supply Rejection Ratio at 120Hz is a specified parameter difference. Evaluate this against your application's noise rejection requirements. For most linear regulator applications, both values provide adequate supply noise attenuation.