74F299PC Shift Register - Equivalent & Substitute Parts

Part Overview

The 74F299PC is an 8-bit universal shift register manufactured by onsemi, housed in a 20-pin DIP package. This component functions as a parallel-in/parallel-out shift register with tri-state outputs, designed for digital logic applications requiring data storage and shifting operations. The 74F299PC is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity.

Substiute Parts

74F299PC

onsemiIn Stock: 1540574F299PC Datasheet

Current PartRFQ

SN74ALS299N

Texas InstrumentsIn Stock: 4161SN74ALS299N Datasheet

Parametric EquivalentRFQ

SN74F299N

Texas InstrumentsIn Stock: 2317SN74F299N Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74F299PC is determined by strict parameter matching across the following criteria:

• Logic Type: Shift Register (1 element, 8-bit configuration)
• Function: Universal shift register capability
• Output Type: Tri-State outputs
• Voltage Supply Range: 4.5V ~ 5.5V (identical operating range)
• Operating Temperature: 0°C ~ 70°C (identical range)
• Package / Case: 20-DIP (0.300", 7.62mm) form factor
• Mounting Type: Through Hole

Two substitute parts meet all electrical and mechanical parameters: SN74F299N (Texas Instruments, 74F series) and SN74ALS299N (Texas Instruments, 74ALS series). Both maintain identical pin counts, voltage specifications, temperature ratings, and physical packaging, enabling direct functional replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the obsolete 74F299PC, the SN74F299N (Texas Instruments) provides the most direct replacement path. Both components belong to the 74F logic family, ensuring identical electrical performance characteristics and timing specifications. The SN74F299N is currently in active production status with ROHS3 compliance certification.

The SN74ALS299N represents an alternative substitute within the 74ALS logic family. While maintaining identical pin configuration, voltage supply range, and operating temperature specifications, the 74ALS series exhibits different electrical characteristics including propagation delay and power consumption profiles compared to the 74F series. The SN74ALS299N is also in active production status with ROHS3 compliance certification.

Both substitute parts are available in tube packaging and support through-hole mounting on standard PCB assemblies. Selection between SN74F299N and SN74ALS299N should be based on existing circuit timing requirements and power budget constraints specific to the application.

Frequently Asked Questions (FAQ)

Q: Can the SN74F299N directly replace the 74F299PC without circuit modification?

A: Yes. The SN74F299N maintains identical electrical specifications (voltage supply 4.5V ~ 5.5V, operating temperature 0°C ~ 70°C), pin configuration (20-DIP), and functional characteristics (8-bit universal shift register with tri-state outputs). Direct substitution is supported at the component level.

Q: What is the difference between the 74F and 74ALS logic families?

A: Both families operate within the same voltage supply range (4.5V ~ 5.5V) and temperature range (0°C ~ 70°C). The primary differences are propagation delay and power consumption characteristics. The 74F series typically exhibits faster switching speeds, while the 74ALS series offers reduced power dissipation. Pin configuration and functional operation remain identical.

Q: Are both substitute parts RoHS compliant?

A: Yes. Both SN74F299N and SN74ALS299N carry ROHS3 compliance certification. The original 74F299PC is RoHS non-compliant. If RoHS compliance is a design requirement, either substitute part satisfies this criterion.

Q: Can the SN74ALS299N be used in place of the SN74F299N?

A: Both parts meet all specified electrical and mechanical parameters for substitution. However, timing-sensitive applications may require evaluation of propagation delay specifications between the 74F and 74ALS families. Functional compatibility is confirmed; performance validation depends on circuit-specific timing margins.

Q: What packaging options are available for the substitute parts?

A: Both SN74F299N and SN74ALS299N are supplied in tube packaging. Both maintain the 20-DIP (0.300", 7.62mm) through-hole form factor, compatible with standard PCB assembly processes.