CD74ACT257M Equivalent & Substitute Parts

Part Overview

The CD74ACT257M is a 4 x 2:1 multiplexer logic integrated circuit 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 procurement. The CD74ACT257M operates as a single-supply logic device with output drive capabilities of 75mA high and low, suitable for digital signal routing and selection applications in ACT logic families.

Substiute Parts

CD74ACT257M

Texas InstrumentsIn Stock: 2304CD74ACT257M Datasheet

Current PartRFQ

CD74ACT257M96

Texas InstrumentsIn Stock: 5625CD74ACT257M96 Datasheet

DirectRFQ

MC74ACT257DR2G

onsemiIn Stock: 2766MC74ACT257DR2G Datasheet

DirectRFQ

CD74ACT258M

Texas InstrumentsIn Stock: 6275CD74ACT258M Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD74ACT257M is determined by the following critical parameters: circuit configuration (4 x 2:1 multiplexer), package type (16-SOIC), voltage supply range (4.5V ~ 5.5V), and output current drive capability (75mA high and low). Parts are grouped into two categories:

Direct Substitutes (Packaging Variant): Parts with identical electrical specifications and package footprint but different packaging format (Tape & Reel vs. Tube).

Parametric Equivalents (Functional Compatibility): Parts with the same circuit configuration and package but variations in output current drive or operating temperature range that remain functionally compatible within the specified supply voltage and logic family.

Parameter Comparison

Engineering Selection Recommendations

CD74ACT257M96 (Texas Instruments): This part is the direct substitute with identical electrical specifications and 16-SOIC package footprint. The only difference is packaging format (Tape & Reel vs. Tube). This part has Active product status and is recommended for new designs and ongoing procurement where the original CD74ACT257M is no longer available.

MC74ACT257DR2G (onsemi): This part provides functional compatibility with the same 4 x 2:1 multiplexer circuit and 16-SOIC package. Output current drive is reduced to 24mA (compared to 75mA), and operating temperature range is narrower (-40°C ~ 85°C vs. -55°C ~ 125°C). This part is suitable for applications where the reduced output current and narrower temperature range are acceptable. Product status is Active.

CD74ACT258M (Texas Instruments): This part is a parametric equivalent with identical output current (75mA) and operating temperature range (-55°C ~ 125°C). The base product number differs (74ACT258 vs. 74ACT257), indicating a different internal circuit configuration despite the same 4 x 2:1 multiplexer designation. Product status is Last Time Buy, indicating limited availability for future procurement.

Frequently Asked Questions (FAQ)

Q: Can CD74ACT257M96 be used as a direct replacement for CD74ACT257M?

A: Yes. CD74ACT257M96 is electrically identical to CD74ACT257M with the same 16-SOIC package footprint, voltage supply range (4.5V ~ 5.5V), output current (75mA), and operating temperature range (-55°C ~ 125°C). The only difference is packaging format (Tape & Reel vs. Tube). Both are ROHS3 compliant.

Q: What are the limitations of MC74ACT257DR2G as a substitute?

A: MC74ACT257DR2G has reduced output current drive (24mA vs. 75mA) and a narrower operating temperature range (-40°C ~ 85°C vs. -55°C ~ 125°C). Applications requiring the full 75mA output current or operation below -40°C or above 85°C must use CD74ACT257M96 or CD74ACT258M instead.

Q: Is CD74ACT258M a suitable replacement?

A: CD74ACT258M maintains the same output current (75mA) and operating temperature range (-55°C ~ 125°C) as the original CD74ACT257M. However, the base product number differs (74ACT258), indicating a different internal circuit configuration. Functional compatibility must be verified for the specific application. Product status is Last Time Buy, limiting future availability.

Q: Are all substitute parts in the same 16-SOIC package?

A: Yes. All substitute parts use the 16-SOIC (0.154", 3.90mm Width) package, ensuring identical PCB footprint compatibility with the original CD74ACT257M.

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

A: Tube packaging is used for lower-volume orders and manual handling, while Tape & Reel (TR) packaging is used for automated assembly processes. Both formats contain the same component; the difference is in handling and storage method. CD74ACT257M96 is available in Tape & Reel format, making it suitable for high-volume manufacturing.