74AC163SC Binary Counter Equivalent & Substitute Parts

Part Overview

The 74AC163SC is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-SOIC surface mount package. This component functions as a synchronous, positive-edge-triggered counter with up-counting capability and synchronous reset functionality. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity. Substitute parts maintain identical or compatible electrical and mechanical specifications while offering improved availability or active product status.

Substiute Parts

74AC163SC

onsemiIn Stock: 69574AC163SC Datasheet

Current PartRFQ

MC74AC163DR2G

onsemiIn Stock: 3811MC74AC163DR2G Datasheet

DirectRFQ

CD74AC163M

Harris CorporationIn Stock: 4903CD74AC163M Datasheet

SimilarRFQ

CD74AC163M96

Texas InstrumentsIn Stock: 5878CD74AC163M96 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74AC163SC is determined by the following critical parameters: logic type (binary counter), bit width (4-bit), counting direction (up), reset mechanism (synchronous), trigger type (positive edge), and physical package (16-SOIC surface mount). Parts meeting these core specifications are classified as direct or similar substitutes based on electrical performance characteristics and product status.

Direct Substitutes maintain all electrical parameters within compatible ranges and identical package specifications. Similar Substitutes may exhibit variations in count rate, voltage supply range, or operating temperature while preserving functional equivalence within the 74AC logic family.

Parameter Comparison

Engineering Selection Recommendations

MC74AC163DR2G (onsemi) is the primary direct substitute for 74AC163SC. Both parts are manufactured by onsemi, share identical electrical specifications (140 MHz count rate, 2 V ~ 6 V supply, -40°C ~ 85°C operating range), and use the same 16-SOIC package. MC74AC163DR2G holds active product status and ROHS3 compliance, providing superior long-term availability and regulatory alignment.

CD74AC163M96 (Texas Instruments) serves as an alternative substitute with active product status and ROHS3 compliance. This part operates at 90 MHz count rate and supports a broader temperature range (-55°C ~ 125°C) and lower voltage floor (1.5 V minimum). Selection of CD74AC163M96 is appropriate for applications requiring extended temperature operation or lower supply voltage tolerance, provided the 90 MHz count rate meets system timing requirements.

CD74AC163M (Harris Corporation) is functionally equivalent but carries obsolete status and RoHS non-compliance, limiting its suitability for new designs or regulated applications. This part should be considered only when existing inventory constraints or legacy system requirements necessitate its use.

Frequently Asked Questions (FAQ)

Q: Can MC74AC163DR2G directly replace 74AC163SC without circuit modification?

A: Yes. Both parts maintain identical count rate (140 MHz), supply voltage range (2 V ~ 6 V), operating temperature range (-40°C ~ 85°C), and 16-SOIC package specifications. Pin-for-pin compatibility is assured.

Q: What are the trade-offs when selecting CD74AC163M96 instead of MC74AC163DR2G?

A: CD74AC163M96 operates at 90 MHz versus 140 MHz for MC74AC163DR2G. This reduced count rate is suitable for applications with lower timing requirements. CD74AC163M96 offers extended temperature range (-55°C ~ 125°C) and lower minimum supply voltage (1.5 V), beneficial for harsh environment or low-power applications. Both maintain 16-SOIC package compatibility and active product status.

Q: Is CD74AC163M suitable for new production designs?

A: CD74AC163M is not recommended for new designs. The part carries obsolete status and RoHS non-compliance. Use MC74AC163DR2G or CD74AC163M96 for new production to ensure regulatory compliance and long-term supply availability.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use 16-SOIC (0.154", 3.90mm Width) surface mount packaging. Packaging format differences exist only in supplier delivery method: MC74AC163DR2G is supplied in Tape & Reel format, CD74AC163M in Tube format, and CD74AC163M96 in Tape & Reel format. These differences do not affect circuit-level compatibility.

Q: What compliance certifications should I verify for regulatory requirements?

A: MC74AC163DR2G and CD74AC163M96 both carry ROHS3 compliance certification. All parts are REACH Unaffected and classified as EAR99 for export control purposes. Verify specific regulatory requirements for your application region before final part selection.