74HC670D,652 Register File Equivalent & Substitute Parts

Part Overview

The 74HC670D,652 is a 4x4 register file logic IC manufactured by NXP USA Inc., designed for high-speed data storage and retrieval applications. This component features a 1x1:1 circuit configuration with 4 independent circuits, operating across a 2V to 6V supply voltage range. The part is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

74HC670D,652

NXP USA Inc.In Stock: 103074HC670D,652 Datasheet

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CD74HC670M

Texas InstrumentsIn Stock: 1092CD74HC670M Datasheet

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CD74HC670M96

Texas InstrumentsIn Stock: 715CD74HC670M96 Datasheet

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CD74HC670MT

Texas InstrumentsIn Stock: 715CD74HC670MT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC670D,652 are qualified based on the following critical parameters:

• Base Product Number Match: All substitutes share the 74HC670 base designation, ensuring identical functional architecture
• Circuit Configuration: Maintained at 1x1:1 with 4 independent circuits across all alternatives
• Package Compatibility: All substitutes use 16-SOIC (0.154", 3.90mm Width) surface mount packaging, enabling direct PCB footprint compatibility
• Voltage Supply Range: All alternatives operate within the 2V to 6V supply specification
• Compliance Standards: All substitutes maintain ROHS3 compliance and MSL 1 rating

The substitute parts differ primarily in manufacturer (Texas Instruments vs. NXP), product status, and packaging format (Tube, Tape & Reel, or unspecified), while maintaining electrical and mechanical equivalence.

Parameter Comparison

Engineering Selection Recommendations

CD74HC670M96 is the primary substitute for new designs and procurement. This part maintains Active product status, ensuring long-term availability and supply chain stability. It is supplied in Tape & Reel format, suitable for automated assembly processes. All electrical specifications and compliance certifications align with the original 74HC670D,652.

CD74HC670M serves as an alternative with Last Time Buy status, indicating limited future availability. This part is supplied in Tube packaging and remains suitable for applications where the original NXP component is no longer obtainable.

CD74HC670MT is available in inventory but carries Discontinued at DiGi Electronics status, limiting procurement reliability for ongoing production requirements.

All three Texas Instruments substitutes extend the operating temperature range to -55°C to 125°C, providing enhanced performance margin in low-temperature environments compared to the original -40°C specification.

Frequently Asked Questions (FAQ)

Q: Can CD74HC670M96 be used as a direct replacement for 74HC670D,652?

A: Yes. Both parts share identical circuit configuration (1x1:1 with 4 independent circuits), voltage supply range (2V to 6V), and 16-SOIC package footprint. The electrical and mechanical specifications are equivalent for PCB integration.

Q: What is the difference between CD74HC670M and CD74HC670M96?

A: Both are functionally identical Texas Instruments register file ICs with matching electrical specifications. The primary differences are packaging format (Tube vs. Tape & Reel) and product status (Last Time Buy vs. Active). CD74HC670M96 is recommended for new procurement due to its Active status.

Q: Why do the Texas Instruments substitutes have a wider operating temperature range?

A: The Texas Instruments variants specify -55°C to 125°C operating temperature, compared to the NXP original at -40°C to 125°C. This extended lower temperature specification provides additional design margin for applications operating in cold environments, while maintaining full compatibility with the original -40°C minimum requirement.

Q: Are all substitutes RoHS3 compliant?

A: Yes. The 74HC670D,652 and all three substitute parts (CD74HC670M, CD74HC670M96, CD74HC670MT) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Which substitute should be selected for new production designs?

A: CD74HC670M96 is the recommended choice for new designs. It maintains Active product status, ensuring sustained availability and supply chain continuity. The Tape & Reel packaging format supports high-volume automated assembly processes.