74F163ASC Equivalent & Substitute Parts

Part Overview

The 74F163ASC 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 a maximum count rate of 120 MHz and operates within a 4.5V to 5.5V supply voltage range. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

74F163ASC

onsemiIn Stock: 90274F163ASC Datasheet

Current PartRFQ

SN74F163AD

Texas InstrumentsIn Stock: 2141SN74F163AD Datasheet

DirectRFQ

SN74F163ADR

Texas InstrumentsIn Stock: 8780SN74F163ADR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74F163ASC is determined by strict equivalence across the following parameters:

Logic Type, Number of Bits per Element, Direction, Reset Type, Timing Method, Trigger Type, Supply Voltage Range, Operating Temperature Range, Package Type, and Mounting Type must remain identical. The Count Rate specification may vary provided the substitute meets or exceeds the original specification. Packaging format (tube, tape & reel) does not affect functional compatibility but may impact procurement and assembly workflows.

The identified substitute parts—SN74F163AD and SN74F163ADR, both manufactured by Texas Instruments—satisfy all mandatory electrical and mechanical compatibility criteria for the 74F163ASC.

Parameter Comparison

Engineering Selection Recommendations

For new designs and ongoing system support, SN74F163ADR is the preferred substitute. This part carries Active product status from Texas Instruments, ensuring long-term availability and supply chain stability. It is RoHS3 compliant and available in tape & reel packaging, which is standard for automated assembly processes.

SN74F163AD serves as a secondary alternative, classified as Last Time Buy by Texas Instruments. This part is functionally equivalent but carries a finite supply window. It is also RoHS3 compliant and available in tube packaging, suitable for lower-volume applications or manual assembly workflows.

Both Texas Instruments substitutes operate at 100 MHz, which is below the original 74F163ASC specification of 120 MHz. In applications where the full 120 MHz count rate is critical, system-level timing analysis is required to confirm that 100 MHz operation remains acceptable.

Frequently Asked Questions (FAQ)

Q: Can SN74F163AD and SN74F163ADR be used interchangeably with the 74F163ASC?

A: Yes. Both parts are functionally equivalent across all critical electrical and mechanical parameters: 4-bit binary counter architecture, synchronous positive edge triggering, identical supply voltage range (4.5V–5.5V), matching operating temperature range (0°C–70°C), and identical 16-SOIC package footprint. The primary difference is product status and packaging format.

Q: What is the significance of the 100 MHz count rate in the Texas Instruments parts versus the 120 MHz specification of the 74F163ASC?

A: The Texas Instruments substitutes operate at a maximum count rate of 100 MHz, compared to 120 MHz for the onsemi original. This difference must be evaluated within the context of the application's timing requirements. If the system design depends on the full 120 MHz capability, substitution requires confirmation that 100 MHz operation does not compromise system performance.

Q: What is the difference between SN74F163AD and SN74F163ADR?

A: Both parts are electrically identical. The difference lies in packaging format and product lifecycle status. SN74F163AD is supplied in tube packaging and carries Last Time Buy status. SN74F163ADR is supplied in tape & reel format and maintains Active status, making it the recommended choice for new designs and long-term availability.

Q: Are there any compliance or certification differences between these parts?

A: Both Texas Instruments substitutes are RoHS3 compliant. All three parts (original and substitutes) are REACH unaffected and carry the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications. Moisture sensitivity level is 1 (Unlimited) for all parts.

Q: Can these parts be used in existing PCB designs without layout modifications?

A: Yes. All three parts share identical 16-SOIC package dimensions (0.154" width, 3.90mm). PCB footprints and land patterns designed for the 74F163ASC are directly compatible with SN74F163AD and SN74F163ADR without modification.