CD74ACT299M Equivalent & Substitute Parts

Part Overview

The CD74ACT299M is an 8-bit universal shift/storage register manufactured by Texas Instruments in the 74ACT logic family. This component functions as a parallel-in/parallel-out shift register with tri-state outputs, designed for digital logic applications requiring data manipulation and temporary storage capabilities. The part is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for existing applications and new designs requiring this functional capability.

Substiute Parts

CD74ACT299M

Texas InstrumentsIn Stock: 1026CD74ACT299M Datasheet

Current PartRFQ

CD74ACT299M96

Texas InstrumentsIn Stock: 1246CD74ACT299M96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74ACT299M is determined by strict equivalence across the following critical parameters:

• Logic Type: Shift Register (8-bit universal function)
• Output Type: Tri-State configuration
• Voltage Supply Range: 4.5V ~ 5.5V
• Operating Temperature Range: -55°C ~ 125°C
• Package / Case: 20-SOIC form factor with identical pinout
• Base Product Number: 74ACT299 series designation
• Electrical Characteristics: Identical functional behavior and timing

The CD74ACT299M96 qualifies as a direct substitute based on matching all electrical parameters, functional specifications, and physical packaging requirements. The primary distinction is packaging format: the main part uses Tube packaging while the substitute uses Tape & Reel (TR) format. Both formats contain identical die and electrical performance.

Parameter Comparison

Engineering Selection Recommendations

The CD74ACT299M96 is the direct functional equivalent for the CD74ACT299M. Both parts share identical electrical specifications, pinout configuration, and performance characteristics within the 20-SOIC package format.

Selection between these parts should be based on:

• Procurement requirements: The CD74ACT299M96 maintains Active product status, ensuring continued availability and supply chain stability. The CD74ACT299M is in Last Time Buy status.
• Packaging format compatibility: Tube packaging (CD74ACT299M) suits manual assembly and small-quantity applications. Tape & Reel format (CD74ACT299M96) is optimized for automated pick-and-place assembly and high-volume production.
• Compliance requirements: Both parts meet ROHS3 and REACH compliance standards, suitable for regulated applications.
• Moisture handling: Both parts carry MSL Level 1 (Unlimited), requiring standard moisture control during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT299M96 be used as a direct replacement for CD74ACT299M in existing designs?

A: Yes. The CD74ACT299M96 is electrically and functionally identical to the CD74ACT299M. Both parts use the same 20-SOIC package with identical pinout, supply voltage range (4.5V ~ 5.5V), operating temperature range (-55°C ~ 125°C), and tri-state output configuration. No circuit modifications are required.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging contains individual components in a plastic tube, suitable for manual handling and small-quantity orders. Tape & Reel packaging places components on a continuous carrier tape wound on a reel, optimized for automated assembly equipment. Both formats contain identical components with identical electrical performance.

Q: Why is CD74ACT299M marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production of this part number. The CD74ACT299M96 (Tape & Reel format) remains in Active production status, providing continued availability for this functional device.

Q: Are there any compliance or certification differences between these parts?

A: No. Both CD74ACT299M and CD74ACT299M96 carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, and MSL Level 1 (Unlimited). Both are suitable for applications requiring these regulatory standards.

Q: Can I mix Tube and Tape & Reel packaging in the same production run?

A: Yes, from an electrical and functional perspective. However, assembly process considerations apply: Tube format requires manual placement or manual feeder setup, while Tape & Reel format integrates directly with standard automated pick-and-place equipment. Mixing formats may require process adjustments.

Q: What is the base product number for these parts?

A: Both parts share the base product number 74ACT299, indicating they belong to the same functional family within the Texas Instruments 74ACT logic series. The suffix designations (M for Tube, M96 for Tape & Reel) indicate packaging format only.