CD74HC670M Equivalent & Substitute Parts

Part Overview

The CD74HC670M is a 4x4 Register File logic IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component functions as a high-speed register storage device with 1x1:1 circuit configuration and 4 independent circuits. The part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

CD74HC670M

Texas InstrumentsIn Stock: 1092CD74HC670M Datasheet

Current PartRFQ

CD74HC670M96

Texas InstrumentsIn Stock: 715CD74HC670M96 Datasheet

MFR RecommendedRFQ

74HCT00D,653

Nexperia USA Inc.In Stock: 267174HCT00D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74HC670M are identified based on strict alignment with the following critical parameters:

Primary Substitution Criteria:

• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Series Compatibility: 74HC or 74HCT logic families
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• Operating Temperature Range: Minimum -40°C to -55°C; Maximum 125°C

Identified Substitutes:

1. CD74HC670M96 (Texas Instruments) – Direct manufacturer equivalent with identical electrical and mechanical specifications. Differs only in packaging format (Tape & Reel vs. Tube) and product status (Active vs. Last Time Buy).

2. 74HCT00D,653 (Nexperia USA Inc.) – Logic IC in 14-SOIC package. This part operates within compatible voltage and temperature ranges but represents a different functional category (NAND Gate vs. Register File) and package configuration (14-SO vs. 16-SOIC).

Parameter Comparison

Engineering Selection Recommendations

CD74HC670M96 is the primary recommended substitute. This part maintains identical electrical specifications, package dimensions, and functional classification as the CD74HC670M. The only distinction is packaging format (Tape & Reel vs. Tube) and active product status, making it the direct replacement for new designs and production continuity.

74HCT00D,653 is not recommended as a functional substitute due to fundamental differences in circuit type (NAND Gate vs. Register File) and package pin count (14-SO vs. 16-SOIC). While both parts comply with RoHS3 and share the same logic family heritage, they serve different circuit functions and cannot be interchanged without complete circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can CD74HC670M96 be used as a direct replacement for CD74HC670M?

A: Yes. CD74HC670M96 is electrically and mechanically identical to CD74HC670M. The difference is packaging format: CD74HC670M is supplied in Tube packaging, while CD74HC670M96 is supplied in Tape & Reel format. Both are 16-SOIC surface mount packages with identical pin configurations and electrical performance.

Q: Why is 74HCT00D,653 listed as a substitute if it is functionally different?

A: 74HCT00D,653 is listed based on the provided input data but is not functionally equivalent. It is a NAND Gate IC, not a Register File. Substitution would require complete circuit redesign and is not recommended for direct replacement applications.

Q: What are the key parameters that determine substitutability?

A: For the CD74HC670M, substitutability is determined by: package type (16-SOIC), mounting method (Surface Mount), voltage supply range (2V ~ 6V minimum), operating temperature range (-55°C to 125°C minimum), RoHS compliance status, and moisture sensitivity level. Functional circuit type (Register File) is also critical for true equivalence.

Q: Are there packaging considerations when switching from CD74HC670M to CD74HC670M96?

A: Both parts use identical 16-SOIC (0.154", 3.90mm Width) packages. The only difference is the supply format: Tube vs. Tape & Reel. PCB footprints, soldering processes, and component placement are identical. No design changes are required.

Q: What is the significance of the Last Time Buy status for CD74HC670M?

A: Last Time Buy indicates the manufacturer will no longer produce this part after a specified date. CD74HC670M96, with Active status, is the recommended transition path to ensure continued supply and design support.