74HCT163D,653 Equivalent & Substitute Parts

Part Overview

The 74HCT163D,653 is a 4-bit binary counter IC manufactured by Nexperia USA Inc., housed in a 16-SOIC package. This synchronous counter operates at a maximum count rate of 45 MHz with positive edge triggering and synchronous reset functionality. The part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Logic Type	Binary Counter
Number of Bits per Element	4 Bit
Count Direction	Up
Reset Type	Synchronous
Trigger Type	Positive Edge
Voltage Supply Range	4.5 V ~ 5.5 V
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 74HCT163D,653 are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain identical logic type (binary counter), bit width (4-bit), count direction (up), reset type (synchronous), and trigger type (positive edge).

Electrical Compatibility: All substitutes operate within the same supply voltage range (4.5 V ~ 5.5 V) and maintain compatible operating temperature ranges suitable for industrial applications.

Package Compatibility: All substitute parts use the 16-SOIC package with identical physical dimensions (0.154", 3.90mm width), ensuring direct PCB footprint compatibility.

Series Alignment: All parts belong to the 74HCT logic family, ensuring TTL-compatible logic levels and timing characteristics.

Compliance Standards: All substitutes maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Parameter Comparison

Parameter	74HCT163D,653 (Nexperia)	CD74HCT163M (TI)	CD74HCT163M96 (TI)	CD74HCT163MT (TI)
Manufacturer	Nexperia USA Inc.	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	Binary Counter	Binary Counter	Binary Counter	Binary Counter
Number of Bits	4 Bit	4 Bit	4 Bit	4 Bit
Count Direction	Up	Up	Up	Up
Reset Type	Synchronous	Synchronous	Synchronous	Synchronous
Trigger Type	Positive Edge	Positive Edge	Positive Edge	Positive Edge
Count Rate	45 MHz	20 MHz	20 MHz	20 MHz
Voltage Supply	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V	4.5 V ~ 5.5 V
Operating Temperature	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Active	Discontinued at DiGi Electronics
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitute: CD74HCT163M96 (Texas Instruments) is the recommended substitute. This part carries active product status, ensuring long-term availability and supply chain stability. It is supplied in Tape & Reel packaging, suitable for high-volume manufacturing environments.

Secondary Substitute: CD74HCT163M (Texas Instruments) is available as a secondary option with Last Time Buy status. This part is supplied in Tube packaging and remains in inventory, providing an alternative for lower-volume applications.

Tertiary Substitute: CD74HCT163MT (Texas Instruments) is available with Tape & Reel packaging but carries discontinued status at DiGi Electronics, limiting long-term procurement viability.

All three Texas Instruments substitutes maintain full functional and electrical compatibility with the original Nexperia part. The primary difference is product lifecycle status and packaging format. For new designs or long-term production, CD74HCT163M96 is the optimal choice due to its active status.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT163M96 directly replace 74HCT163D,653 on existing PCBs?

A: Yes. Both parts use identical 16-SOIC packages with matching pin configurations and electrical specifications. Direct PCB footprint compatibility is confirmed.

Q: What is the significance of the count rate difference (45 MHz vs. 20 MHz)?

A: The original 74HCT163D,653 operates at 45 MHz maximum count rate, while Texas Instruments substitutes operate at 20 MHz. For applications requiring count rates above 20 MHz, the original part specifications must be maintained. For standard applications operating below 20 MHz, substitutes are fully compatible.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitutes (CD74HCT163M, CD74HCT163M96, CD74HCT163MT) maintain ROHS3 compliance and REACH unaffected status.

Q: What packaging options are available for substitutes?

A: CD74HCT163M is supplied in Tube packaging. CD74HCT163M96 and CD74HCT163MT are supplied in Tape & Reel format. Selection depends on manufacturing volume and assembly line requirements.

Q: Why is the operating temperature range different (-40°C to 125°C vs. -55°C to 125°C)?

A: The Texas Instruments substitutes support an extended lower temperature range (-55°C minimum) compared to the original Nexperia part (-40°C minimum). This provides additional margin for applications in extreme cold environments. Both ranges cover the standard industrial temperature specification.

Q: Which substitute should be selected for new product designs?

A: CD74HCT163M96 is recommended for new designs due to its active product status, ensuring availability throughout the product lifecycle. This part is supplied in Tape & Reel format, standard for modern manufacturing processes.

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