74ACTQ08PC AND Gate IC Equivalent & Substitute Parts

Part Overview

The 74ACTQ08PC is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-MDIP packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74ACTQ08PC operates within the 4.5V to 5.5V supply voltage range and is suitable for through-hole mounting applications requiring standard TTL-compatible AND gate functionality.

Substiute Parts

74ACTQ08PC

onsemiIn Stock: 96074ACTQ08PC Datasheet

Current PartRFQ

CD74ACT08E

Harris CorporationIn Stock: 1608CD74ACT08E Datasheet

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SN74ACT08N

Texas InstrumentsIn Stock: 3469SN74ACT08N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74ACTQ08PC is determined by the following critical parameters:

• Logic configuration: 4-channel AND gate with 2 inputs per channel
• Supply voltage range: 4.5V ~ 5.5V
• Output drive capability: 24mA high and low
• Input logic thresholds: 0.8V low, 2V high
• Package type: 14-DIP through-hole form factor
• Mounting compatibility: Through-hole PCB mounting

Substitute parts must maintain identical logic functionality, pin configuration, and electrical operating characteristics within these specified ranges. The 74ACT series variants listed below meet these substitution criteria.

Parameter Comparison

Engineering Selection Recommendations

SN74ACT08N (Texas Instruments) is the preferred substitute for new designs and ongoing procurement. This part maintains active product status, ensuring long-term availability and supply chain stability. The SN74ACT08N meets RoHS3 compliance requirements and demonstrates propagation delay performance (9ns) between the original 74ACTQ08PC (6.5ns) and the CD74ACT08E (12.9ns), making it suitable for timing-critical applications within the specified operating range.

CD74ACT08E (Harris Corporation) serves as an alternative substitute where extended operating temperature range (-55°C ~ 125°C) is required. This part is obsolete but remains available in inventory. The CD74ACT08E exhibits higher quiescent current (4 µA versus 2 µA) and longer propagation delay (12.9ns), which may impact power consumption and timing-sensitive circuit performance.

Both substitute parts are electrically and mechanically compatible with the 74ACTQ08PC within the specified parameter ranges and 14-DIP package footprint.

Frequently Asked Questions (FAQ)

Q: Can the SN74ACT08N directly replace the 74ACTQ08PC in existing designs?

A: Yes. The SN74ACT08N maintains identical pin configuration, logic functionality, supply voltage range (4.5V ~ 5.5V), output drive capability (24mA), and input logic thresholds. The 14-DIP package footprint is mechanically compatible with through-hole PCB layouts designed for the 74ACTQ08PC.

Q: What is the significance of propagation delay differences between these parts?

A: Propagation delay affects circuit timing performance. The 74ACTQ08PC specifies 6.5ns, the SN74ACT08N specifies 9ns, and the CD74ACT08E specifies 12.9ns. For applications with tight timing margins, verify that the substitute part's propagation delay remains acceptable within system-level timing budgets.

Q: Why is the CD74ACT08E listed as obsolete while SN74ACT08N is active?

A: Product status reflects manufacturer support and long-term availability. Active products receive ongoing manufacturing and supply chain support, while obsolete products may have limited inventory and no future production. For new designs, active products are preferred.

Q: Are there package or mounting differences between these parts?

A: All three parts use 14-DIP (0.300", 7.62mm) through-hole packaging. No package conversion or PCB layout modification is required for substitution.

Q: What compliance certifications apply to these substitute parts?

A: The SN74ACT08N is RoHS3 compliant. The CD74ACT08E is RoHS non-compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.