UA79M08CKTPR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The UA79M08CKTPR is a linear voltage regulator IC manufactured by Texas Instruments, designed to provide a fixed negative output of -8V at 500mA. This Surface Mount device in TO-252-3 (DPAK) packaging is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The part operates across an input voltage range up to -25V and includes integrated protection features for over-current, over-temperature, and short-circuit conditions.

Substiute Parts

UA79M08CKTPR

Texas InstrumentsIn Stock: 1637UA79M08CKTPR Datasheet

Current PartRFQ

UA79M08CKVURG3

Texas InstrumentsIn Stock: 2746UA79M08CKVURG3 Datasheet

Parametric EquivalentRFQ

MC79M08BDTRKG

onsemiIn Stock: 4408MC79M08BDTRKG Datasheet

MFR RecommendedRFQ

MC79M08CDTRKG

onsemiIn Stock: 16361MC79M08CDTRKG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the UA79M08CKTPR is determined by strict equivalence across the following critical parameters:

• Output Configuration & Voltage: Negative output at fixed -8V
• Current Rating: 500mA output capability
• Package Type: TO-252-3 (DPAK) Surface Mount
• Protection Features: Over-current, over-temperature, and short-circuit protection
• Compliance: ROHS3 compliance and REACH unaffected status

The substitute parts identified maintain these core electrical and mechanical specifications. Variations in input voltage maximum rating (-25V vs. -35V), PSRR performance (59dB vs. 63dB), and operating temperature ranges do not preclude substitution when the application requirements fall within the substitute part's specifications.

Parameter Comparison

Engineering Selection Recommendations

UA79M08CKVURG3 (Texas Instruments, Parametric Equivalent)

This part maintains identical electrical specifications to the main part, including input voltage maximum of -25V, dropout voltage, and PSRR performance. It is an active product from the original manufacturer. The primary difference is packaging format (Bulk vs. Tape & Reel), which does not affect electrical compatibility. This part is suitable for direct substitution when Texas Instruments sourcing is preferred and application requirements do not exceed -25V input.

MC79M08BDTRKG (onsemi, MFR Recommended)

This onsemi alternative provides enhanced input voltage tolerance (-35V maximum vs. -25V), superior PSRR performance (63dB vs. 59dB), and extended low-temperature operation (-40°C minimum). It is an active product supplied in Tape & Reel packaging. The MC79M08 series maintains identical output voltage, current rating, and package form factor. This part is suitable for applications requiring higher input voltage headroom or extended temperature range.

MC79M08CDTRKG (onsemi, MFR Recommended)

This onsemi variant is functionally equivalent to MC79M08BDTRKG with identical electrical performance. It is supplied in Cut Tape & Digi-Reel packaging and operates across 0°C to 125°C. This part is suitable for applications with standard temperature requirements and alternative packaging preferences.

All substitute parts are ROHS3 compliant and REACH unaffected, maintaining regulatory alignment with the original part.

Frequently Asked Questions (FAQ)

Q: Can UA79M08CKVURG3 be used as a direct replacement for UA79M08CKTPR?

A: Yes. Both parts are Texas Instruments products with identical electrical specifications: -8V fixed output, 500mA current rating, -25V maximum input voltage, and TO-252-3 packaging. The only difference is the packaging format (Bulk vs. Tape & Reel), which does not affect circuit performance.

Q: What are the advantages of using MC79M08BDTRKG or MC79M08CDTRKG over the Texas Instruments alternatives?

A: The onsemi MC79M08 series offers -35V maximum input voltage (vs. -25V), providing 10V additional headroom. PSRR performance is improved to 63dB (vs. 59dB). MC79M08BDTRKG additionally supports operation down to -40°C. These enhancements are beneficial for applications with higher input voltage stress or extended temperature requirements.

Q: Are all substitute parts in the same package?

A: Yes. All parts use TO-252-3 (DPAK) Surface Mount packaging with 2 leads plus tab configuration. Pin-to-pin compatibility is maintained across all substitutes.

Q: What protection features are included in each part?

A: UA79M08CKTPR and UA79M08CKVURG3 include over-current, over-temperature, and short-circuit protection. MC79M08BDTRKG and MC79M08CDTRKG include over-current and over-temperature protection. Short-circuit protection is not specified for the onsemi variants.

Q: Are all substitute parts ROHS3 compliant?

A: MC79M08BDTRKG and MC79M08CDTRKG are confirmed ROHS3 compliant. UA79M08CKVURG3 compliance status is not specified in available documentation.

Q: Which substitute part should be selected for new designs?

A: Selection depends on application requirements. For standard applications within -25V input and 0°C to 125°C operation, UA79M08CKVURG3 maintains original specifications. For applications requiring higher input voltage tolerance or extended temperature range, MC79M08BDTRKG is recommended. MC79M08CDTRKG is suitable when onsemi sourcing is preferred with standard temperature requirements.