74F174PC Equivalent & Substitute Parts

Part Overview

The 74F174PC is a D-Type flip-flop integrated circuit manufactured by onsemi, designed for digital logic applications requiring 6-bit positive edge-triggered storage. This component features a master reset function and operates at clock frequencies up to 80 MHz with a propagation delay of 10ns at 5V with 50pF load. The 74F174PC is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance, repair, and legacy design support.

Substiute Parts

74F174PC

onsemiIn Stock: 181874F174PC Datasheet

Current PartRFQ

SN74F174AN

Texas InstrumentsIn Stock: 2266SN74F174AN Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F174PC is determined by strict equivalence across the following critical parameters:

• Logic Function: D-Type flip-flop with 6-bit configuration, 1 element, positive edge trigger
• Output Characteristics: Non-inverted output type with specified current drive (1mA high, 20mA low)
• Electrical Performance: Clock frequency capability, propagation delay, supply voltage range (4.5V ~ 5.5V), and quiescent current
• Physical Form Factor: 16-DIP package with 0.300" (7.62mm) pitch for through-hole mounting
• Functional Features: Master reset capability

The SN74F174AN from Texas Instruments meets all substitution criteria. Both parts share identical base product number (74F174), belong to the same 74F logic series, and maintain functional and electrical equivalence across all specified parameters. The SN74F174AN is currently in active production status, providing a direct replacement path for obsolete 74F174PC units.

Parameter Comparison

Engineering Selection Recommendations

The SN74F174AN from Texas Instruments is the direct functional equivalent for the obsolete 74F174PC. Selection is based on the following engineering criteria:

Product Status: The SN74F174AN maintains active production status, ensuring long-term availability and supply chain continuity compared to the obsolete 74F174PC.

Compliance and Certifications: Both parts carry identical REACH Unaffected status and EAR99 export classification, maintaining regulatory equivalence. The SN74F174AN includes RoHS3 compliance certification, providing enhanced environmental compliance for new designs and system upgrades.

Electrical Performance: The SN74F174AN exceeds the minimum performance specifications of the 74F174PC. While maintaining identical propagation delay (10ns @ 5V, 50pF) and output drive characteristics, the SN74F174AN supports clock frequencies up to 140 MHz compared to 80 MHz for the 74F174PC, providing performance headroom for existing and future applications.

Physical Compatibility: Both parts utilize identical 16-DIP through-hole packaging with 0.300" (7.62mm) pitch, enabling direct socket substitution without PCB modification.

Frequently Asked Questions (FAQ)

Q: Can the SN74F174AN directly replace the 74F174PC in existing circuits?

A: Yes. The SN74F174AN is a direct functional and physical equivalent. Both parts share identical logic function, electrical specifications, output drive characteristics, supply voltage range, and 16-DIP package form factor. Direct socket substitution is possible without circuit modification.

Q: What is the difference in clock frequency between these parts?

A: The 74F174PC operates at a maximum clock frequency of 80 MHz, while the SN74F174AN supports up to 140 MHz. Both parts maintain the same 10ns propagation delay at 5V with 50pF load. The higher frequency capability of the SN74F174AN does not affect compatibility in applications using the 74F174PC.

Q: Are there any compliance differences between the two parts?

A: Both parts maintain REACH Unaffected status and EAR99 export classification. The SN74F174AN includes RoHS3 compliance certification, which the 74F174PC does not specify. This provides enhanced environmental compliance for new system designs and upgrades.

Q: Why is the 74F174PC listed as obsolete?

A: The 74F174PC is classified as obsolete by onsemi. The SN74F174AN from Texas Instruments provides an active production alternative with identical functional and electrical characteristics, ensuring continued availability for system maintenance and component replacement.

Q: Are the pin configurations identical between these parts?

A: Yes. Both the 74F174PC and SN74F174AN use the 16-DIP package with 0.300" (7.62mm) pitch. Pin configuration, function, and spacing are identical, enabling direct replacement without PCB rework.

Q: What is the moisture sensitivity level for the SN74F174AN?

A: The SN74F174AN is listed as Not Applicable for moisture sensitivity level, indicating it does not require special moisture control handling during storage and assembly compared to the 74F174PC, which carries MSL 1 (Unlimited) classification.