CD74HCT299M Equivalent & Substitute Parts

Part Overview

The CD74HCT299M is a universal shift register IC manufactured by Texas Instruments, featuring 2 elements with 8 bits per element in a 20-SOIC surface mount package. This component is classified as Last Time Buy, indicating discontinued production with limited availability. The CD74HCT299M operates within a 4.5V to 5.5V supply voltage range and supports tri-state output configuration, making it suitable for digital logic applications requiring shift register functionality.

Due to Last Time Buy status and limited inventory (1500 pcs), identifying equivalent substitute parts with active production status ensures long-term design continuity and supply chain reliability.

Substiute Parts

CD74HCT299M

Texas InstrumentsIn Stock: 1605CD74HCT299M Datasheet

Current PartRFQ

CD74HCT299M96

Texas InstrumentsIn Stock: 31503CD74HCT299M96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HCT299M is determined by strict equivalence across the following critical parameters:

• Logic Type: Shift Register
• Number of Elements: 2
• Number of Bits per Element: 8
• Function: Universal
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Operating Temperature: -55°C ~ 125°C
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• Base Product Number: 74HCT299

The CD74HCT299M96 qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility. The primary distinction is packaging format: the CD74HCT299M is supplied in Tube packaging (Last Time Buy status), while the CD74HCT299M96 is supplied in Tape & Reel format with Active product status and significantly higher inventory availability (31449 pcs).

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT299M96 is the direct substitute for CD74HCT299M based on identical electrical and mechanical specifications. Selection of the CD74HCT299M96 is supported by the following factors:

• Active product status ensures continued availability and manufacturing support from Texas Instruments
• Significantly higher inventory levels (31449 pcs vs. 1500 pcs) provide supply chain security
• Identical compliance certifications: ROHS3 Compliant, REACH Unaffected, MSL 1
• Identical electrical performance across all operating parameters
• Identical mechanical compatibility with 20-SOIC surface mount footprint
• Packaging format difference (Tape & Reel vs. Tube) does not affect component functionality or performance

Frequently Asked Questions (FAQ)

Q: Can CD74HCT299M96 be used as a direct replacement for CD74HCT299M in existing designs?

A: Yes. The CD74HCT299M96 is electrically and mechanically identical to the CD74HCT299M. Both components share the same base product number (74HCT299), identical pin configuration, electrical specifications, and 20-SOIC package dimensions. The only difference is packaging format (Tape & Reel vs. Tube).

Q: What is the significance of the packaging format difference?

A: Packaging format affects handling and assembly processes but does not impact component performance. Tube packaging is typically used for lower-volume applications, while Tape & Reel packaging is standard for automated assembly lines. Both formats contain identical die and electrical characteristics.

Q: Why is CD74HCT299M classified as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued production of this specific packaging variant. The CD74HCT299M96 (Tape & Reel format) remains in active production, making it the recommended long-term solution.

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

A: No. Both parts carry identical certifications: ROHS3 Compliant, REACH Unaffected, MSL 1 (Unlimited), ECCN EAR99, and HTSUS 8542.39.0001.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on matching: logic type (Shift Register), element count (2), bits per element (8), function (Universal), output type (Tri-State), supply voltage (4.5V ~ 5.5V), operating temperature range (-55°C ~ 125°C), package type (20-SOIC), and mounting method (Surface Mount).