74ACT163SJ Binary Counter IC Equivalent & Substitute Parts

Part Overview

The 74ACT163SJ is a 4-bit binary counter IC manufactured by onsemi, designed for synchronous counting applications with positive edge triggering. This surface-mount logic component operates at a maximum count rate of 140 MHz and is suitable for digital circuit designs requiring reliable binary counting functionality. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing production support and design continuity.

Key Parameters

Parameter	Specification
Logic Type	Binary Counter
Number of Bits per Element	4 Bit
Number of Elements	1
Direction	Up
Reset Type	Synchronous
Timing	Synchronous
Trigger Type	Positive Edge
Count Rate	140 MHz
Voltage Supply Range	4.5 V ~ 5.5 V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
Package Type	16-SOIC
Base Product Number	74ACT163

Substitute Part Grouping Explanation

Substitute parts for the 74ACT163SJ are identified based on strict electrical and mechanical compatibility criteria. All substitute candidates must maintain the following core parameters:

Logic Type: Binary Counter
Number of Bits per Element: 4 Bit
Number of Elements: 1
Direction: Up
Reset Type: Synchronous
Timing: Synchronous
Trigger Type: Positive Edge
Voltage Supply Range: 4.5 V ~ 5.5 V
Mounting Type: Surface Mount
Base Product Number: 74ACT163

The identified substitute parts (CD74ACT163M and CD74ACT163M96) meet these core functional requirements. Variations in count rate, operating temperature range, package dimensions, and product status are secondary considerations that may affect suitability depending on application requirements.

Parameter Comparison

Parameter	74ACT163SJ (onsemi)	CD74ACT163M (Harris)	CD74ACT163M96 (TI)
Logic Type	Binary Counter	Binary Counter	Binary Counter
Number of Bits per Element	4 Bit	4 Bit	4 Bit
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	140 MHz	80 MHz	80 MHz
Voltage Supply Range	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V
Operating Temperature Range	-40°C ~ 85°C	-55°C ~ 125°C	-55°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Type	16-SOIC (0.209", 5.30mm)	16-SOIC (0.154", 3.90mm)	16-SOIC (0.154", 3.90mm)
Product Status	Obsolete	Obsolete	Active
RoHS Status	Not specified	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

CD74ACT163M96 (Texas Instruments) is the preferred substitute for new designs and ongoing production. This part is currently active in production status, ensuring long-term availability and supply chain stability. The CD74ACT163M96 is ROHS3 compliant, meeting modern environmental and regulatory requirements. The extended operating temperature range (-55°C ~ 125°C) provides greater thermal margin compared to the original 74ACT163SJ.

CD74ACT163M (Harris Corporation) is an alternative substitute with equivalent functional specifications. However, this part is classified as obsolete and RoHS non-compliant, making it less suitable for new designs or applications requiring regulatory compliance.

Both substitute parts operate at 80 MHz count rate, which is lower than the original 74ACT163SJ at 140 MHz. Applications requiring the higher count rate of the original part may require design evaluation. Package dimension differences (0.209" vs. 0.154" width) must be verified for PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT163M96 directly replace 74ACT163SJ in existing designs?

A: Electrical substitution is valid based on core functional parameters (4-bit binary counter, synchronous operation, positive edge trigger, 4.5-5.5V supply). However, PCB layout verification is required due to package width differences (0.209" vs. 0.154"). The lower count rate (80 MHz vs. 140 MHz) must be evaluated for timing-critical applications.

Q: What is the difference between CD74ACT163M and CD74ACT163M96?

A: Both parts share identical functional specifications and package dimensions. The primary differences are manufacturer (Harris vs. Texas Instruments), product status (obsolete vs. active), and RoHS compliance (non-compliant vs. ROHS3 compliant). CD74ACT163M96 is recommended for new designs due to active production status and regulatory compliance.

Q: Are there package compatibility concerns between these parts?

A: Yes. The 74ACT163SJ uses a 16-SOIC package with 0.209" width, while both CD74ACT163M and CD74ACT163M96 use 16-SOIC packages with 0.154" width. Pin pitch and lead configuration remain compatible, but PCB footprint and placement area differ. Layout verification is necessary before implementation.

Q: Does the 80 MHz count rate of substitute parts affect circuit performance?

A: The substitute parts operate at 80 MHz maximum count rate compared to 140 MHz for the original 74ACT163SJ. Applications operating below 80 MHz are unaffected. Designs requiring count rates above 80 MHz require alternative component selection or circuit redesign.

Q: Which substitute part should be selected for new production?

A: CD74ACT163M96 (Texas Instruments) is the recommended choice for new production due to active product status, ROHS3 compliance, and extended operating temperature range. This ensures supply chain continuity and regulatory compliance for long-term production support.

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