74AC163PC Binary Counter IC Equivalent & Substitute Parts

Part Overview

The 74AC163PC is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-DIP package. This synchronous counter operates on positive edge triggers and is designed for digital logic applications requiring binary counting functionality. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and legacy design support.

Substiute Parts

74AC163PC

onsemiIn Stock: 189274AC163PC Datasheet

Current PartRFQ

CD74AC163E

Harris CorporationIn Stock: 50105CD74AC163E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74AC163PC is determined by the following critical parameters:

• Logic Function: Binary counter with 4-bit capacity, 1 element
• Trigger Mechanism: Positive edge triggered, synchronous reset
• Package Compatibility: 16-DIP (0.300", 7.62mm) through-hole mounting
• Electrical Specifications: Supply voltage range, count rate, and operating temperature range
• Series Compatibility: 74AC logic family

The CD74AC163E qualifies as a substitute based on matching logic function, trigger type, reset mechanism, package form factor, and series designation. Variations in electrical performance parameters (count rate, voltage range, temperature range) and compliance certifications must be evaluated against specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

CD74AC163E as Substitute for 74AC163PC:

The CD74AC163E is functionally equivalent for applications where the specified performance parameters are compatible. Both parts share identical logic architecture, package form factor, and trigger characteristics.

Performance Considerations:

The CD74AC163E operates at a maximum count rate of 90 MHz compared to the 74AC163PC's 140 MHz. Applications requiring operation at or below 90 MHz are unaffected. Applications designed for the full 140 MHz capability of the 74AC163PC may experience performance limitations with the CD74AC163E.

Voltage and Temperature Ranges:

The CD74AC163E supports a lower minimum supply voltage (1.5 V versus 2 V) and an extended operating temperature range (-55°C to 125°C versus -40°C to 85°C). These differences do not preclude substitution in applications operating within the CD74AC163E's specified ranges.

Compliance Status:

The CD74AC163E is marked as RoHS non-compliant. Applications subject to RoHS requirements must account for this designation.

Both parts are classified as obsolete. Availability and long-term sourcing should be evaluated independently.

Frequently Asked Questions (FAQ)

Q: Can the CD74AC163E directly replace the 74AC163PC in all applications?

A: Direct replacement is possible when the application's maximum required count rate does not exceed 90 MHz, supply voltage remains within 1.5 V to 5.5 V, and operating temperature stays within -55°C to 125°C. The identical package and logic function ensure mechanical and functional compatibility within these electrical constraints.

Q: What is the primary difference between these two parts?

A: The primary difference is the maximum count rate: 140 MHz for the 74AC163PC versus 90 MHz for the CD74AC163E. The CD74AC163E also offers extended temperature range capability and lower minimum supply voltage.

Q: Are both parts pin-compatible?

A: Yes. Both parts use the 16-DIP (0.300", 7.62mm) package with identical pinout, ensuring direct socket compatibility.

Q: Does the CD74AC163E's RoHS non-compliance affect substitution decisions?

A: RoHS compliance status is a regulatory and procurement consideration, not a functional one. Applications not subject to RoHS requirements are unaffected. Applications with RoHS mandates must source compliant alternatives or obtain exemptions.

Q: Can the CD74AC163E be used in high-frequency applications designed for the 74AC163PC?

A: Only if the application's actual operating frequency does not exceed 90 MHz. Applications requiring the full 140 MHz specification of the 74AC163PC cannot use the CD74AC163E without performance degradation.

Q: What should be verified before substitution?

A: Confirm that the application's maximum count rate requirement does not exceed 90 MHz, supply voltage operates within 1.5 V to 5.5 V, and operating temperature remains within -55°C to 125°C. Verify compliance requirements if RoHS status is relevant to your application.