KA79L08AZTA Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The KA79L08AZTA is a linear voltage regulator IC manufactured by onsemi, designed to provide a fixed negative output of -8V at 100mA. This device is classified as a negative fixed output regulator within the Power Management (PMIC) category and is packaged in a TO-92-3 through-hole configuration.

The KA79L08AZTA is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for systems utilizing this regulator.

Substiute Parts

KA79L08AZTA

onsemiIn Stock: 1032KA79L08AZTA Datasheet

Current PartRFQ

L79L08ACZ-AP

STMicroelectronicsIn Stock: 4093L79L08ACZ-AP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the KA79L08AZTA is determined by the following critical parameters:

• Output Configuration & Voltage: Negative output at fixed -8V
• Current Rating: 100mA output capability
• Maximum Input Voltage: -30V tolerance
• Package Type: TO-92-3 through-hole configuration
• Operating Temperature Range: 0°C ~ 125°C
• Protection Features: Over Temperature and Short Circuit protection

The L79L08ACZ-AP from STMicroelectronics meets all these core electrical and mechanical specifications, making it a parametric equivalent suitable for direct substitution in applications requiring a negative -8V, 100mA linear regulator in a TO-92-3 package.

Parameter Comparison

Engineering Selection Recommendations

The L79L08ACZ-AP is a direct parametric equivalent to the KA79L08AZTA. Both devices share identical electrical specifications for output voltage, current rating, input voltage tolerance, quiescent current, and protection features. Both operate across the same temperature range and utilize the same TO-92-3 through-hole package.

The primary distinction is product status: the KA79L08AZTA is obsolete, while the L79L08ACZ-AP is active and currently in production. The L79L08ACZ-AP additionally carries ROHS3 compliance certification, meeting modern regulatory requirements for new designs and production runs.

For applications currently using the KA79L08AZTA, the L79L08ACZ-AP provides a functionally equivalent replacement with the advantage of ongoing manufacturer support and supply availability.

Frequently Asked Questions (FAQ)

Q: Can the L79L08ACZ-AP be used as a direct replacement for the KA79L08AZTA?

A: Yes. Both devices provide identical output voltage (-8V), current rating (100mA), input voltage tolerance (-30V maximum), and operate across the same temperature range (0°C ~ 125°C). Both are packaged in TO-92-3 through-hole configuration with identical pin assignments and protection features.

Q: What is the difference in PSRR between the two parts?

A: The KA79L08AZTA specifies 55dB PSRR at 120Hz, while the L79L08ACZ-AP specifies 45dB at 120Hz. Both values are within acceptable ranges for linear negative voltage regulators in this class. The difference does not affect functional substitution for standard applications.

Q: Why is the KA79L08AZTA listed as obsolete?

A: The KA79L08AZTA has been discontinued by onsemi. The L79L08ACZ-AP from STMicroelectronics remains in active production and serves as the recommended alternative for new designs and ongoing supply requirements.

Q: Are there any compliance differences between these parts?

A: The L79L08ACZ-AP carries ROHS3 compliance certification, making it suitable for applications subject to modern environmental and regulatory standards. Both parts are REACH Unaffected and carry the same ECCN and HTSUS classifications.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. Both parts use the TO-92-3 package with identical lead configuration and spacing. No PCB modifications are required for substitution.