74ACTQ14PC Equivalent & Substitute Parts

Part Overview

The 74ACTQ14PC is a 6-channel inverter IC with Schmitt trigger inputs manufactured by onsemi in a 14-MDIP package. This device is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates within a 4.5V to 5.5V supply voltage range and is designed for through-hole mounting applications requiring logic inversion with hysteresis characteristics.

Substiute Parts

74ACTQ14PC

onsemiIn Stock: 91674ACTQ14PC Datasheet

Current PartRFQ

SN74ACT14N

Texas InstrumentsIn Stock: 3496SN74ACT14N Datasheet

DirectRFQ

CD74ACT14E

Harris CorporationIn Stock: 2300CD74ACT14E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ14PC is determined by the following criteria:

Primary Compatibility Requirements:

• Logic type: Inverter with 6 channels and 1 input per channel
• Schmitt trigger functionality
• Supply voltage range: 4.5V ~ 5.5V
• Output current capability: 24mA minimum for both high and low states
• Package type: 14-DIP through-hole configuration
• Operating temperature range: minimum -40°C to maximum 85°C

Substitute Parts Identified:

1. SN74ACT14N (Texas Instruments) - Direct substitute. Active product status with identical functional specifications and package compatibility.

2. CD74ACT14E (Harris Corporation) - Similar substitute. Functionally equivalent with extended operating temperature range (-55°C ~ 125°C). Obsolete status. Quiescent current specification differs (4 µA vs. 2 µA).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SN74ACT14N (Texas Instruments)

The SN74ACT14N is the preferred substitute for the 74ACTQ14PC. This part maintains active product status, ensuring long-term availability and supply chain stability. It meets all functional requirements with identical supply voltage, output current, and operating temperature specifications. The SN74ACT14N carries ROHS3 compliance, supporting modern manufacturing and environmental standards. Propagation delay is marginally higher (11.5ns vs. 10ns), which remains acceptable for most applications within the specified operating parameters.

Secondary Option: CD74ACT14E (Harris Corporation)

The CD74ACT14E provides functional equivalence with an extended operating temperature range (-55°C ~ 125°C). However, this part is obsolete and carries RoHS non-compliance status. Selection of this substitute should be limited to applications requiring the extended temperature specification where the 74ACTQ14PC or SN74ACT14N cannot meet design requirements. Quiescent current is elevated at 4 µA compared to 2 µA for the primary options.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT14N directly replace the 74ACTQ14PC without circuit modifications?

A: Yes. The SN74ACT14N is pin-compatible and functionally equivalent. Both devices operate at 4.5V ~ 5.5V supply voltage, provide 24mA output current capability, and are housed in identical 14-DIP packages. The 1.5ns difference in propagation delay is negligible for standard logic applications.

Q: What is the significance of the Schmitt trigger feature in these parts?

A: The Schmitt trigger input provides hysteresis, improving noise immunity by establishing separate voltage thresholds for rising and falling edges. This feature is consistent across all three parts listed and is essential for applications requiring reliable signal conditioning in noisy environments.

Q: Why is the CD74ACT14E listed as a similar rather than direct substitute?

A: The CD74ACT14E differs in three key aspects: obsolete product status, RoHS non-compliance, and elevated quiescent current (4 µA vs. 2 µA). While functionally compatible, it offers an extended operating temperature range (-55°C ~ 125°C) not required by the base 74ACTQ14PC specification. Selection should be application-specific.

Q: Are there package compatibility concerns when substituting these parts?

A: No. All three parts use the 14-DIP (0.300", 7.62mm) through-hole package. Pin assignments and mechanical dimensions are identical, allowing direct socket replacement without PCB modifications.

Q: What compliance considerations apply to substitute selection?

A: The SN74ACT14N is ROHS3 compliant, meeting current environmental regulations. The 74ACTQ14PC and CD74ACT14E compliance status differs. For new designs or applications subject to RoHS requirements, the SN74ACT14N is the appropriate choice.

Q: How do the input logic level specifications compare across these parts?

A: Input logic level specifications vary. The 74ACTQ14PC specifies discrete thresholds (Low: 0.8V, High: 2V). The SN74ACT14N provides ranges (Low: 0.5V ~ 1.4V, High: 1.2V ~ 2.1V). The CD74ACT14E specifies ranges (Low: 0.8V ~ 1.3V, High: 1.4V ~ 2V). All remain compatible within standard TTL/CMOS logic voltage domains.