74F163ASJ Binary Counter IC Equivalent & Substitute Parts

Part Overview

The 74F163ASJ is a 4-bit binary counter IC manufactured by onsemi, housed in a 16-SOP 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 4.5 V to 5.5 V supply voltage range. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Logic Type	Binary Counter
Number of Bits per Element	4
Number of Elements	1
Direction	Up
Reset Type	Synchronous
Timing	Synchronous
Trigger Type	Positive Edge
Count Rate	120 MHz
Voltage - Supply	4.5 V ~ 5.5 V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	16-SOIC

Substitute Part Grouping Explanation

Substitution eligibility for the 74F163ASJ is determined by strict alignment with the following core parameters:

Logic Type: Binary Counter
Number of Bits per Element: 4
Number of Elements: 1
Direction: Up
Reset Type: Synchronous
Timing: Synchronous
Trigger Type: Positive Edge
Voltage - Supply: 4.5 V ~ 5.5 V
Operating Temperature: 0°C ~ 70°C
Mounting Type: Surface Mount
Package / Case: 16-SOIC

The identified substitute parts—SN74F163AD and SN74F163ADR—meet all critical functional and electrical parameters. Both are manufactured by Texas Instruments and belong to the same 74F series base product family (74F163). Variations in count rate (100 MHz vs. 120 MHz) and package dimensions (0.154" vs. 0.209" width) do not preclude substitution when the application does not require the maximum specified performance of the original part.

Parameter Comparison

Parameter	74F163ASJ (onsemi)	SN74F163AD (TI)	SN74F163ADR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments
Logic Type	Binary Counter	Binary Counter	Binary Counter
Number of Bits per Element	4	4	4
Number of Elements	1	1	1
Direction	Up	Up	Up
Reset Type	Synchronous	Synchronous	Synchronous
Timing	Synchronous	Synchronous	Synchronous
Trigger Type	Positive Edge	Positive Edge	Positive Edge
Count Rate	120 MHz	100 MHz	100 MHz
Voltage - Supply	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	16-SOIC (0.209", 5.30mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete	Last Time Buy	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Packaging	Not specified	Tube	Tape & Reel (TR)

Engineering Selection Recommendations

For applications currently using the 74F163ASJ, the SN74F163ADR is the preferred substitute. This part carries Active product status, ensuring long-term availability and supply chain stability. It is ROHS3 compliant and supplied in Tape & Reel packaging, which is standard for high-volume production environments.

The SN74F163AD is an alternative substitute with Last Time Buy status, suitable for applications where Tube packaging is acceptable and where the transition timeline allows for inventory planning around its eventual discontinuation.

Both Texas Instruments substitutes operate within the same electrical specifications and mounting requirements as the original 74F163ASJ. The reduction in maximum count rate from 120 MHz to 100 MHz is not a functional limitation for applications operating below 100 MHz. Package dimension differences (0.154" vs. 0.209" width) require PCB layout verification to confirm compatibility with existing footprints.

Frequently Asked Questions (FAQ)

Q: Can the SN74F163AD and SN74F163ADR be used interchangeably with the 74F163ASJ?

A: Yes, both parts are functionally equivalent. The primary differences are product status, packaging format, and package dimensions. Electrical performance and pin configuration are identical.

Q: What is the significance of the count rate difference (120 MHz vs. 100 MHz)?

A: The 74F163ASJ specifies a maximum count rate of 120 MHz, while the Texas Instruments substitutes specify 100 MHz. This difference does not affect substitution for applications operating at or below 100 MHz. Applications requiring operation above 100 MHz must retain the original part or conduct timing analysis to confirm compatibility.

Q: Are there packaging considerations when switching from 74F163ASJ to SN74F163ADR?

A: Yes. The 74F163ASJ uses a 16-SOP package (0.209" width), while the SN74F163ADR uses a 16-SOIC package (0.154" width). Although both are surface mount packages with identical pin counts and configurations, the physical dimensions differ. PCB footprint compatibility must be verified before implementation.

Q: Why is the SN74F163ADR recommended over the SN74F163AD?

A: The SN74F163ADR has Active product status, ensuring continued availability and support. The SN74F163AD is designated Last Time Buy, indicating a planned discontinuation. For new designs or long-term production, the Active part provides superior supply chain assurance.

Q: Are the substitute parts RoHS compliant?

A: Yes, both SN74F163AD and SN74F163ADR are ROHS3 compliant. The original 74F163ASJ RoHS status is not specified in the available data.

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