74VHC163M Binary Counter IC - Equivalent & Substitute Parts

Part Overview

The 74VHC163M is a 4-bit binary counter IC manufactured by onsemi, designed for synchronous counting applications with positive edge triggering. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The 74VHC163M operates across a wide supply voltage range of 2V to 5.5V and supports count rates up to 125 MHz, making it suitable for digital logic circuits requiring reliable binary counting functionality in surface mount configurations.

Substiute Parts

74VHC163M

onsemiIn Stock: 119974VHC163M Datasheet

Current PartRFQ

SN74LV163AD

Texas InstrumentsIn Stock: 3720SN74LV163AD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VHC163M is determined by the following critical parameters that must remain consistent:

• Logic Function: Binary counter with 4-bit capacity and 1 element configuration
• Trigger Mechanism: Positive edge triggering for synchronous operation
• Reset Configuration: Synchronous reset functionality
• Package Specification: 16-SOIC surface mount package with 0.154" width (3.90mm)
• Voltage Compatibility: Supply voltage range of 2V to 5.5V
• Operating Temperature Range: -40°C to 85°C
• Mounting Type: Surface mount technology

The SN74LV163AD from Texas Instruments meets all these core substitution criteria. While the count rate differs (90 MHz versus 125 MHz), this represents a functional capability difference rather than an incompatibility, as the substitute part maintains all electrical and mechanical interface requirements.

Parameter Comparison

Engineering Selection Recommendations

The SN74LV163AD serves as a direct functional substitute for the 74VHC163M in applications where the maximum count rate requirement does not exceed 90 MHz. Both components share identical package geometry, electrical interface specifications, and operating temperature ranges, enabling direct board-level replacement without PCB redesign.

The SN74LV163AD carries Last Time Buy status from Texas Instruments, indicating continued availability with defined end-of-life parameters. This status provides greater supply chain certainty compared to the obsolete 74VHC163M. The substitute part maintains ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

Selection between these parts should be based on application frequency requirements. Applications operating below 90 MHz can utilize the SN74LV163AD without functional compromise. Applications requiring operation above 90 MHz must retain the 74VHC163M or identify alternative counter architectures.

Frequently Asked Questions (FAQ)

Q: Can the SN74LV163AD replace the 74VHC163M in all applications?

A: The SN74LV163AD provides functional substitution for applications where the maximum count rate does not exceed 90 MHz. Both parts share identical package specifications, voltage ranges, and operating temperature ranges. Applications requiring count rates between 90 MHz and 125 MHz require the original 74VHC163M or alternative components.

Q: Are there package compatibility concerns between these parts?

A: Both the 74VHC163M and SN74LV163AD use the 16-SOIC package with identical 0.154" width (3.90mm) specification. No PCB layout modifications are required for substitution. Pin configuration and electrical interface remain consistent between parts.

Q: What is the significance of the product status difference?

A: The 74VHC163M is classified as obsolete, indicating discontinued manufacturing and limited availability. The SN74LV163AD carries Last Time Buy status, meaning Texas Instruments continues to supply the part under defined end-of-life conditions. This distinction affects long-term supply chain planning and procurement strategy.

Q: Do voltage supply requirements differ between these parts?

A: Both parts operate across the identical supply voltage range of 2V to 5.5V. No power supply modifications are necessary when substituting between these components.

Q: Are there compliance or certification differences?

A: The SN74LV163AD is ROHS3 compliant, while the 74VHC163M compliance status is not specified in the provided parameters. Both parts are REACH unaffected. For applications requiring specific compliance certifications, verify the 74VHC163M documentation with the manufacturer.