74HCT251D,652 Equivalent & Substitute Parts

Part Overview

The 74HCT251D,652 is a 1 x 8:1 multiplexer logic IC manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates on a single 4.5V to 5.5V supply with 4mA output drive capability and supports industrial temperature ranges from -40°C to 125°C.

Substiute Parts

74HCT251D,652

Nexperia USA Inc.In Stock: 73174HCT251D,652 Datasheet

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CD74HCT251M

Harris CorporationIn Stock: 1345CD74HCT251M Datasheet

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CD74HCT251M96

Texas InstrumentsIn Stock: 1987CD74HCT251M96 Datasheet

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CD74HCT251MT

Texas InstrumentsIn Stock: 902CD74HCT251MT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT251D,652 is determined by the following critical parameters:

• Functional equivalence: 1 x 8:1 multiplexer circuit configuration
• Electrical compatibility: Single supply voltage range 4.5V ~ 5.5V, output current 4mA/4mA
• Package compatibility: 16-SOIC surface mount package (0.154", 3.90mm Width)
• Series alignment: 74HCT logic family
• Temperature range: Operating range must support the application requirements

All substitute parts listed maintain identical circuit topology, electrical specifications, and physical packaging. Differences in product status, RoHS compliance, and packaging format (Tube, Tape & Reel, Cut Tape) do not affect functional interchangeability in the circuit.

Parameter Comparison

Engineering Selection Recommendations

CD74HCT251M96 (Texas Instruments) is the primary recommended substitute. This part maintains active product status, ensuring long-term availability and supply chain stability. It carries ROHS3 compliance matching the original part and provides an extended operating temperature range (-55°C to 125°C) that exceeds the original specification. Tape & Reel packaging supports high-volume manufacturing requirements.

CD74HCT251MT (Texas Instruments) serves as a secondary option with identical electrical and thermal specifications to CD74HCT251M96. This part is discontinued at DiGi Electronics but remains ROHS3 compliant with MSL 1 rating. Cut Tape & Digi-Reel® packaging accommodates lower-volume or prototype applications.

CD74HCT251M (Harris Corporation) is functionally equivalent but carries RoHS non-compliance status and obsolete product classification. This part should be selected only when RoHS exemptions apply to the application or when legacy system requirements mandate Harris Corporation sourcing.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT251M96 directly replace 74HCT251D,652 in existing designs?

A: Yes. Both parts share identical 1 x 8:1 multiplexer functionality, 16-SOIC package dimensions, and electrical specifications (4.5V ~ 5.5V supply, 4mA output drive). The extended temperature range of CD74HCT251M96 (-55°C to 125°C) provides additional margin beyond the original -40°C to 125°C specification.

Q: What is the difference between Tube, Tape & Reel, and Cut Tape packaging?

A: Packaging format affects procurement and assembly processes. Tube packaging suits lower-volume orders and manual assembly. Tape & Reel (TR) packaging is optimized for automated pick-and-place assembly in high-volume production. Cut Tape (CT) & Digi-Reel® provides intermediate flexibility for moderate-volume applications.

Q: Does RoHS compliance affect functional interchangeability?

A: No. RoHS compliance is a regulatory and environmental designation that does not alter circuit function or electrical performance. However, design specifications may mandate RoHS compliance for certain applications or markets. CD74HCT251M96 and CD74HCT251MT both meet ROHS3 requirements, while CD74HCT251M does not.

Q: Are all substitute parts qualified for the same temperature range?

A: The substitute parts support -55°C to 125°C, which exceeds the original 74HCT251D,652 range of -40°C to 125°C. Applications requiring only the original -40°C to 125°C range will operate within the qualified envelope of all substitutes.

Q: What does Moisture Sensitivity Level (MSL) 1 mean?

A: MSL 1 indicates unlimited shelf life without moisture bake-out requirements. Parts with this rating can be stored indefinitely under normal conditions without degradation of solder joint reliability.