CD74AC251M Equivalent & Substitute Parts

Part Overview

The CD74AC251M is a 1 x 8:1 multiplexer logic IC manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is classified as discontinued at DiGi Electronics, making equivalent substitute parts essential for ongoing production and maintenance applications. The CD74AC251M operates across a wide temperature range (-55°C to 125°C) and supports supply voltages from 1.5V to 5.5V, making it suitable for diverse industrial and commercial applications requiring multiplexing functionality.

Substiute Parts

CD74AC251M

Texas InstrumentsIn Stock: 1978CD74AC251M Datasheet

Current PartRFQ

CD74AC251M96

Texas InstrumentsIn Stock: 5130CD74AC251M96 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD74AC251M is determined by strict equivalence across the following critical parameters:

• Multiplexer circuit configuration (1 x 8:1)
• Package type and physical dimensions (16-SOIC, 0.154" width)
• Electrical specifications (voltage supply 1.5V ~ 5.5V, output current 75mA/75mA)
• Operating temperature range (-55°C ~ 125°C)
• Surface mount mounting type
• Compliance certifications (RoHS3, REACH Unaffected)

The CD74AC251M96 qualifies as a direct substitute based on identical electrical and mechanical parameters. The primary distinction is packaging format: the original part uses Tube packaging, while the substitute uses Tape & Reel (TR) packaging. Both parts share the same base product number (74AC251) and maintain full functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The CD74AC251M96 is a valid direct substitute for the CD74AC251M based on complete electrical and mechanical equivalence. The substitute part maintains active product status, ensuring long-term availability and supply chain reliability. Both parts carry identical RoHS3 compliance and REACH Unaffected certifications, meeting regulatory requirements for industrial and commercial applications.

The primary consideration for selection is packaging format. The CD74AC251M96 is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes and high-volume production. Organizations currently using Tube-packaged CD74AC251M units should evaluate their assembly infrastructure to determine compatibility with TR packaging. No functional or electrical modifications are required when transitioning between these two part numbers.

Frequently Asked Questions (FAQ)

Q: Can CD74AC251M96 be used as a direct replacement for CD74AC251M?

A: Yes. Both parts are identical in electrical specifications, circuit configuration, package dimensions, and operating parameters. The only difference is the packaging format (Tube versus Tape & Reel).

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

A: Tube packaging supplies components in plastic tubes suitable for manual handling and small-quantity applications. Tape & Reel (TR) packaging supplies components on continuous tape wound on reels, optimized for automated pick-and-place assembly equipment. Both formats contain the same component with identical electrical performance.

Q: Are there any compatibility issues when switching from CD74AC251M to CD74AC251M96?

A: No compatibility issues exist at the component level. The 16-SOIC package dimensions are identical. Assembly compatibility depends on whether your production equipment supports Tape & Reel format. Manual assembly processes can accommodate both formats with appropriate handling procedures.

Q: Does the CD74AC251M96 meet the same compliance standards?

A: Yes. The CD74AC251M96 carries identical RoHS3 compliance and REACH Unaffected status as the original CD74AC251M, meeting all regulatory requirements for the same applications.

Q: Why is the CD74AC251M discontinued while CD74AC251M96 remains active?

A: The CD74AC251M96 in Tape & Reel format is the standard production format for this multiplexer IC. The Tube-packaged variant (CD74AC251M) has been discontinued in favor of the more widely used TR packaging format.

Q: What is the MSL rating and why does it matter?

A: Both parts carry MSL 1 (Unlimited) rating, indicating unlimited shelf life without moisture sensitivity concerns. This simplifies storage and handling requirements for both the original and substitute parts.