74F399PC Equivalent & Substitute Parts

Part Overview

The 74F399PC is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in a 16-DIP through-hole package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production support. The 74F399PC operates with single supply voltage (4.5V ~ 5.5V) and is suitable for applications requiring multiplexing functionality in standard TTL logic environments.

Substiute Parts

74F399PC

onsemiIn Stock: 159074F399PC Datasheet

Current PartRFQ

SN74F157AN

Texas InstrumentsIn Stock: 3481SN74F157AN Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F399PC is determined by strict equivalence across the following critical parameters:

• Circuit configuration: 4 x 2:1 multiplexer topology
• Package type: 16-DIP (0.300", 7.62mm) through-hole
• Voltage supply range: 4.5V ~ 5.5V
• Output current specifications: 1mA high, 20mA low
• Operating temperature range: 0°C ~ 70°C
• Independent circuits: 1

The SN74F157AN from Texas Instruments meets all these electrical and mechanical requirements, making it a parametric equivalent suitable for direct replacement in applications currently using the 74F399PC.

Parameter Comparison

Engineering Selection Recommendations

The SN74F157AN is the primary substitute for the 74F399PC. The Texas Instruments part maintains active product status, ensuring continued availability and manufacturing support. Both components share identical electrical specifications and package geometry, enabling direct pin-compatible replacement.

The SN74F157AN carries RoHS3 compliance certification, meeting modern environmental and regulatory requirements. The onsemi 74F399PC, as an obsolete component, lacks current compliance documentation. For new designs or production transitions, the SN74F157AN is the appropriate selection.

Both parts are classified as REACH Unaffected and carry EAR99 export classification, with matching HTSUS commodity codes (8542.39.0001).

Frequently Asked Questions (FAQ)

Q: Can the SN74F157AN directly replace the 74F399PC in existing designs?

A: Yes. The SN74F157AN is a parametric equivalent with identical pin configuration, voltage supply range, output current specifications, and operating temperature range. No circuit modifications are required for direct substitution in 16-DIP through-hole applications.

Q: What is the primary reason for substitution?

A: The 74F399PC is classified as obsolete. The SN74F157AN maintains active product status, ensuring reliable supply chain availability and manufacturing continuity.

Q: Are there packaging differences between these parts?

A: Both components use 16-DIP (0.300", 7.62mm) through-hole packages. No mechanical or footprint changes are necessary when substituting.

Q: What compliance certifications apply to the substitute part?

A: The SN74F157AN is RoHS3 compliant and REACH Unaffected. Both parts carry EAR99 export classification.

Q: Are the electrical characteristics identical?

A: Yes. Both parts operate at 4.5V ~ 5.5V supply voltage, deliver 1mA high and 20mA low output current, and function across 0°C ~ 70°C operating temperature range.