74HC299D,652 Universal Shift Register Equivalent & Substitute Parts

Part Overview

The 74HC299D,652 is a universal shift register IC manufactured by Nexperia USA Inc., designed for multiplexed 8-bit shift register applications in logic circuits. This component features tri-state output capability and operates across a 2V to 6V supply voltage range. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74HC299D,652

Nexperia USA Inc.In Stock: 105774HC299D,652 Datasheet

Current PartRFQ

CD74HC299M

Texas InstrumentsIn Stock: 2280CD74HC299M Datasheet

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CD74HC299M96

Texas InstrumentsIn Stock: 1734CD74HC299M96 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HC299D,652 is determined by strict equivalence across the following critical parameters:

• Base product number: 74HC299 (same logic family and function)
• Logic type: Register, Multiplexed (identical shift register architecture)
• Bit configuration: 1 element, 8 bits per element (same data width)
• Output type: Tri-State (required for bus-compatible applications)
• Supply voltage: 2V ~ 6V (identical operating range)
• Package: 20-SOIC form factor (mechanical and electrical compatibility)
• RoHS3 compliance and MSL Level 1 (regulatory and environmental requirements)

Two substitute parts meet these criteria: CD74HC299M (Texas Instruments, Last Time Buy status) and CD74HC299M96 (Texas Instruments, Active status).

Parameter Comparison

Engineering Selection Recommendations

For applications currently using the 74HC299D,652, the CD74HC299M96 is the primary substitute due to its Active product status, ensuring long-term availability and supply chain stability. This part is supplied in Cut Tape and Digi-Reel packaging formats, supporting both prototype and production volume requirements.

The CD74HC299M (Last Time Buy status) remains functionally equivalent but represents a transitional product with limited future availability. Selection of this part should be reserved for applications with specific packaging requirements (Tube format) or where existing inventory commitments exist.

Both substitute parts maintain ROHS3 compliance and MSL Level 1 ratings, meeting the same regulatory and environmental standards as the original component. The extended operating temperature range (-55°C to 125°C) of the Texas Instruments alternatives provides additional thermal margin compared to the original specification (-40°C to 125°C).

Frequently Asked Questions (FAQ)

Q: Can CD74HC299M96 be used as a direct replacement for 74HC299D,652?

A: Yes. Both parts share identical logic function, bit configuration, output type, supply voltage range, and 20-SOIC package form factor. Pin-to-pin compatibility is maintained across all functional parameters.

Q: What is the difference between CD74HC299M and CD74HC299M96?

A: Both parts are functionally identical. The primary differences are product status (Last Time Buy vs. Active) and packaging format (Tube vs. Cut Tape/Digi-Reel). CD74HC299M96 is recommended for new designs due to its Active status.

Q: Does the extended temperature range of the Texas Instruments parts affect compatibility?

A: No. The CD74HC299M and CD74HC299M96 operate across -55°C to 125°C, which encompasses the original -40°C to 125°C range. This provides additional thermal margin without affecting electrical compatibility.

Q: Are there any package considerations when switching from 74HC299D,652 to the substitute parts?

A: All three parts use the 20-SOIC package with identical 0.295" (7.50mm) width. Surface mount assembly processes remain unchanged. Packaging format (Tube vs. Cut Tape/Digi-Reel) affects handling and storage but not electrical or mechanical compatibility.

Q: What certifications and compliance standards apply to these substitute parts?

A: All three parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. ECCN classification is EAR99 for all variants.