CD74HCT151MT Equivalent & Substitute Parts

Part Overview

The CD74HCT151MT is a 1 x 8:1 multiplexer logic IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The CD74HCT151MT operates from a single 4.5V to 5.5V supply and is suitable for applications requiring high-speed data selection and routing in digital logic circuits.

Substiute Parts

CD74HCT151MT

Texas InstrumentsIn Stock: 690CD74HCT151MT Datasheet

Current PartRFQ

CD74HCT151M96

Harris CorporationIn Stock: 2949CD74HCT151M96 Datasheet

Parametric EquivalentRFQ

CD74HCT251M96

Texas InstrumentsIn Stock: 1987CD74HCT251M96 Datasheet

Parametric EquivalentRFQ

CD74HCT251MT

Texas InstrumentsIn Stock: 902CD74HCT251MT Datasheet

Parametric EquivalentRFQ

74HCT151D,653

Nexperia USA Inc.In Stock: 349374HCT151D,653 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74HCT151MT is determined by the following critical parameters: multiplexer circuit configuration (1 x 8:1), voltage supply range (4.5V ~ 5.5V), output current capability (4mA / 4mA), package type (16-SOIC), and operating temperature range. Parts meeting these electrical and mechanical specifications are classified as parametric equivalents. Product status and compliance certifications are secondary factors that influence selection priority but do not disqualify a part from functional substitution.

The substitute parts identified fall into two categories: parametric equivalents with identical electrical characteristics and manufacturer-recommended alternatives with minor operational differences.

Parameter Comparison

Engineering Selection Recommendations

For new designs and production continuity, CD74HCT251M96 is the primary substitute. This part is manufactured by Texas Instruments, maintains active product status, carries ROHS3 compliance certification, and meets all electrical and mechanical specifications of the CD74HCT151MT. The packaging format (Tape & Reel) supports high-volume manufacturing workflows.

CD74HCT251MT serves as a secondary option for applications where Texas Instruments sourcing is preferred. Although discontinued at DiGi Electronics, this part shares identical electrical characteristics and RoHS compliance with the main part.

74HCT151D,653 manufactured by Nexperia USA Inc. is a manufacturer-recommended alternative with active product status and full RoHS3 compliance. The operating temperature range is narrower (-40°C ~ 125°C versus -55°C ~ 125°C), which may limit suitability for extended temperature applications.

CD74HCT151M96 from Harris Corporation is not recommended for new designs due to obsolete product status and RoHS non-compliance, despite meeting all electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT251M96 directly replace CD74HCT151MT in existing designs?

A: Yes. Both parts share identical electrical specifications: 1 x 8:1 multiplexer configuration, 4.5V to 5.5V supply voltage, 4mA output current capability, and 16-SOIC package. The base product numbers differ (74HCT251 versus 74HCT151), but functional operation is equivalent for standard multiplexer applications.

Q: What is the difference between 16-SOIC and 16-SO packaging?

A: Both designations refer to 16-pin small-outline integrated circuit packages with 0.154" (3.90mm) width. The 16-SO designation used by Nexperia (74HCT151D,653) is functionally equivalent to the 16-SOIC package used by Texas Instruments and Harris Corporation. PCB footprints are compatible.

Q: Why is the operating temperature range different for 74HCT151D,653?

A: Nexperia specifies -40°C to 125°C operating range, compared to -55°C to 125°C for the CD74HCT151MT. This reflects manufacturer characterization and qualification standards. For applications requiring operation below -40°C, the CD74HCT251M96 or CD74HCT251MT are required.

Q: Are all substitute parts RoHS compliant?

A: CD74HCT251M96, CD74HCT251MT, and 74HCT151D,653 are ROHS3 compliant. CD74HCT151M96 is RoHS non-compliant and unsuitable for applications with RoHS requirements.

Q: Which substitute part has the best availability?

A: CD74HCT251M96 shows 1977 units in stock. 74HCT151D,653 shows 3453 units in stock. Both parts maintain active product status and support ongoing procurement.