74ACT161MTCX Equivalent & Substitute Parts

Part Overview

The 74ACT161MTCX is a 4-bit binary counter IC manufactured by onsemi, designed for synchronous counting applications with positive edge triggering. This component features a count rate of 125 MHz and operates across a supply voltage range of 4.5 V to 5.5 V. The device is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The 74ACT161 series provides a standardized logic function across multiple manufacturers and package configurations, enabling direct substitution based on electrical and mechanical compatibility.

Substiute Parts

74ACT161MTCX

onsemiIn Stock: 371374ACT161MTCX Datasheet

Current PartRFQ

CD74ACT161M96

Texas InstrumentsIn Stock: 4021CD74ACT161M96 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT161MTCX is determined by strict adherence to the following electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Logic Type: Binary Counter (identical function)
• Number of Bits per Element: 4 (identical bit width)
• Direction: Up (identical counting direction)
• Reset: Asynchronous (identical reset behavior)
• Timing: Synchronous (identical timing architecture)
• Trigger Type: Positive Edge (identical trigger mechanism)
• Voltage - Supply: 4.5 V ~ 5.5 V (identical supply range)
• Series: 74ACT (identical logic family)

Mechanical Compatibility Requirements:

• Mounting Type: Surface Mount (identical mounting method)
• Package Type: 16-pin configuration (identical pin count and function)

The CD74ACT161M96 from Texas Instruments meets all electrical compatibility criteria and operates within the same 74ACT logic family. Both devices share identical functional specifications for counter operation, supply voltage requirements, and trigger characteristics. Package differences (16-TSSOP versus 16-SOIC) represent alternative surface mount configurations with equivalent electrical performance and identical pinout assignments.

Parameter Comparison

Engineering Selection Recommendations

The CD74ACT161M96 from Texas Instruments is a direct functional equivalent to the 74ACT161MTCX. Both devices are classified within the 74ACT logic family and share identical electrical specifications for counter operation, supply voltage, and trigger characteristics.

The primary distinction between these components is product status: the 74ACT161MTCX is obsolete, while the CD74ACT161M96 maintains active production status. This status difference ensures continued availability and supply chain reliability for the Texas Instruments alternative.

Both devices carry identical compliance certifications: REACH Unaffected status and Moisture Sensitivity Level 1 (Unlimited). The CD74ACT161M96 provides an extended operating temperature range (-55°C ~ 125°C) compared to the 74ACT161MTCX (-40°C ~ 85°C), offering broader environmental tolerance for demanding applications.

Package configuration differences (16-TSSOP versus 16-SOIC) represent alternative surface mount options with identical pinout and electrical function. Selection between these packages depends on PCB layout requirements and assembly process compatibility.

Frequently Asked Questions (FAQ)

Q: Can the CD74ACT161M96 directly replace the 74ACT161MTCX in existing designs?

A: Yes. Both devices share identical electrical specifications within the 74ACT logic family, including counter function, bit width, supply voltage range, and trigger characteristics. Pinout assignments are equivalent across both package types.

Q: What are the package differences between 16-TSSOP and 16-SOIC?

A: Both are 16-pin surface mount packages with identical electrical pinout. The 16-TSSOP measures 0.173" (4.40mm) in width, while the 16-SOIC measures 0.154" (3.90mm) in width. Package selection depends on PCB layout constraints and assembly equipment compatibility.

Q: Does the extended operating temperature range of the CD74ACT161M96 affect compatibility?

A: No. The CD74ACT161M96 operating range (-55°C ~ 125°C) encompasses the 74ACT161MTCX range (-40°C ~ 85°C). Extended temperature capability does not impact functional compatibility for applications within the original temperature specification.

Q: Are there compliance or regulatory differences between these parts?

A: Both devices carry identical REACH and Moisture Sensitivity Level certifications. No compliance barriers exist for substitution.

Q: Why is the 74ACT161MTCX classified as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued production. The CD74ACT161M96 from Texas Instruments provides continued access to the 74ACT161 counter function through active production.