74ACT299MTC Equivalent & Substitute Parts

Part Overview

The 74ACT299MTC is an 8-bit universal shift register with tri-state output, manufactured by onsemi in a 20-TSSOP surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The 74ACT series logic family provides standard shift register functionality suitable for digital data manipulation and storage applications requiring compatible electrical and mechanical specifications.

Substiute Parts

74ACT299MTC

onsemiIn Stock: 103674ACT299MTC Datasheet

Current PartRFQ

CD74ACT299M96

Texas InstrumentsIn Stock: 1246CD74ACT299M96 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74ACT299MTC are identified based on the following critical parameters that must remain constant:

• Logic Type: Shift Register
• Number of Elements: 1
• Number of Bits per Element: 8
• Output Type: Tri-State
• Function: Universal
• Voltage - Supply: 4.5V ~ 5.5V
• Base Product Number: 74ACT299
• Mounting Type: Surface Mount
• Moisture Sensitivity Level: 1 (Unlimited)

The CD74ACT299M96 from Texas Instruments qualifies as a direct substitute, maintaining identical functional and electrical specifications while offering an alternative package configuration (20-SOIC instead of 20-TSSOP) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The CD74ACT299M96 serves as a functional equivalent to the 74ACT299MTC with the following considerations:

Electrical Compatibility: Both parts maintain identical supply voltage ranges (4.5V ~ 5.5V) and functional specifications, ensuring direct functional substitution in circuit designs.

Operating Temperature Range: The CD74ACT299M96 provides an extended operating temperature range (-55°C ~ 125°C) compared to the 74ACT299MTC (-40°C ~ 85°C), offering broader environmental capability.

Package Difference: The primary distinction is the package configuration. The 74ACT299MTC uses 20-TSSOP (0.173" width), while the CD74ACT299M96 uses 20-SOIC (0.295" width). This difference requires PCB layout modification and is not a pin-compatible substitution.

Product Status: The CD74ACT299M96 maintains active product status with RoHS3 compliance, ensuring long-term availability and regulatory alignment.

Compliance: Both parts carry identical REACH and ECCN classifications (REACH Unaffected, EAR99), maintaining consistent regulatory standing.

Frequently Asked Questions (FAQ)

Q: Can the CD74ACT299M96 replace the 74ACT299MTC in existing designs?

A: The CD74ACT299M96 provides functional equivalence but requires PCB redesign due to package differences (20-SOIC vs. 20-TSSOP). Pin functionality and electrical specifications are identical.

Q: What is the primary reason for substitution?

A: The 74ACT299MTC is classified as obsolete. The CD74ACT299M96 from Texas Instruments is an active product offering equivalent functionality with extended temperature range and current availability.

Q: Are there pin-compatible alternatives?

A: Based on the provided specifications, the CD74ACT299M96 is the identified substitute. Pin compatibility is not maintained due to package format differences.

Q: What are the moisture sensitivity implications?

A: Both parts carry MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Does the extended temperature range of the CD74ACT299M96 affect circuit design?

A: The extended range (-55°C ~ 125°C vs. -40°C ~ 85°C) provides additional operational margin but does not require design modifications if the original temperature specification is sufficient.