MC74ACT163D Equivalent & Substitute Parts

Part Overview

The MC74ACT163D is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-SOIC surface mount package. This component functions as a synchronous counter with positive edge triggering, designed for digital logic applications requiring binary counting operations. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support, maintenance, and new production requirements where legacy compatibility is required.

Substiute Parts

MC74ACT163D

onsemiIn Stock: 877MC74ACT163D Datasheet

Current PartRFQ

CD74ACT163M

Harris CorporationIn Stock: 3776CD74ACT163M Datasheet

SimilarRFQ

CD74ACT163M96

Texas InstrumentsIn Stock: 7734CD74ACT163M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MC74ACT163D is determined by strict equivalence across the following critical parameters:

• Logic Type: Binary Counter (all candidates match)
• Number of Bits per Element: 4 Bit (all candidates match)
• Direction: Up (all candidates match)
• Reset: Synchronous (all candidates match)
• Timing: Synchronous (all candidates match)
• Trigger Type: Positive Edge (all candidates match)
• Voltage - Supply: 4.5 V ~ 5.5 V (all candidates match)
• Package / Case: 16-SOIC (0.154", 3.90mm Width) (all candidates match)
• Mounting Type: Surface Mount (all candidates match)

Both identified substitute parts—CD74ACT163M (Harris Corporation) and CD74ACT163M96 (Texas Instruments)—meet all core functional and mechanical requirements for direct substitution with the MC74ACT163D.

Parameter Comparison

Engineering Selection Recommendations

Both CD74ACT163M and CD74ACT163M96 are functionally equivalent to the MC74ACT163D across all core electrical and mechanical parameters. Selection between these substitutes should be based on the following criteria:

CD74ACT163M96 (Texas Instruments) is the preferred substitute for new designs and production applications. This part carries Active product status, ensuring long-term availability and supply chain stability. The CD74ACT163M96 is ROHS3 compliant, meeting current environmental and regulatory requirements. Packaging in Tape & Reel format supports automated assembly processes.

CD74ACT163M (Harris Corporation) remains a valid functional equivalent but carries Obsolete product status, similar to the original MC74ACT163D. This part is RoHS non-compliant. Selection of this substitute should be limited to legacy system maintenance where supply constraints or design lock-in requirements necessitate its use.

Both substitutes operate within the same supply voltage range (4.5 V ~ 5.5 V) and share identical package geometry, enabling direct board-level replacement without layout modifications. The extended operating temperature range (-55°C ~ 125°C) of both substitutes provides broader environmental coverage compared to the MC74ACT163D (-40°C ~ 85°C).

Frequently Asked Questions (FAQ)

Q: Can CD74ACT163M96 directly replace MC74ACT163D on existing PCBs?

A: Yes. Both parts use identical 16-SOIC package geometry (0.154", 3.90mm width) and surface mount configuration. Pin-to-pin compatibility is maintained, allowing direct substitution without PCB redesign.

Q: What is the significance of the count rate difference (140 MHz vs. 80 MHz)?

A: The MC74ACT163D specifies a maximum count rate of 140 MHz, while both substitutes specify 80 MHz. Applications operating at frequencies below 80 MHz will function identically with either substitute. Applications requiring operation above 80 MHz must retain the original MC74ACT163D or verify system timing margins with the lower specification.

Q: Why is CD74ACT163M96 preferred over CD74ACT163M?

A: CD74ACT163M96 carries Active product status, ensuring continued manufacturing and availability. It is ROHS3 compliant, meeting current environmental standards. CD74ACT163M is obsolete and non-compliant, presenting long-term supply and regulatory risks.

Q: Are there packaging format differences between the substitutes?

A: CD74ACT163M is supplied in Tube packaging, while CD74ACT163M96 is supplied in Tape & Reel format. Both are 16-SOIC surface mount packages with identical pinouts and dimensions. Tape & Reel format is standard for automated assembly processes.

Q: What is the impact of the extended operating temperature range on system design?

A: Both substitutes operate across -55°C ~ 125°C, compared to the MC74ACT163D range of -40°C ~ 85°C. This extended range provides additional margin for applications in extreme temperature environments. Systems designed within the original -40°C ~ 85°C specification will operate without modification using either substitute.

Q: Are all three parts electrically interchangeable?

A: Yes, within the specified count rate limits. All three parts share identical logic function, pin configuration, supply voltage requirements, and synchronous counter operation. The primary differences are product status, compliance certifications, and maximum count rate specification.