74ACT11257DW Equivalent & Substitute Parts

Part Overview

The 74ACT11257DW is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 20-SOIC surface mount package. This component functions as a data selector, routing one of two input signals to a single output across four independent channels. The part is currently in Last Time Buy status, indicating it is being phased out by the manufacturer. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently utilizing this component.

Substiute Parts

74ACT11257DW

Texas InstrumentsIn Stock: 86174ACT11257DW Datasheet

Current PartRFQ

74ACT11257DWR

Texas InstrumentsIn Stock: 108974ACT11257DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74ACT11257DW is determined by strict equivalence across the following critical parameters:

• Circuit Configuration: Must be 4 x 2:1 multiplexer topology
• Package Type: Must be 20-SOIC with identical 0.295" (7.50mm) width
• Electrical Specifications: Voltage supply range 4.5V ~ 5.5V, output current 24mA (high and low)
• Operating Temperature: -40°C ~ 85°C range
• Mounting Technology: Surface mount compatibility
• Compliance Standards: RoHS3 compliance and MSL Level 1 rating

The primary distinction between the main part and its substitute relates to packaging format (Tube versus Tape & Reel) and product lifecycle status. Both variants share identical electrical and mechanical characteristics, making them functionally interchangeable at the component level.

Parameter Comparison

Engineering Selection Recommendations

The 74ACT11257DWR is the direct substitute for the 74ACT11257DW. Both parts are manufactured by Texas Instruments and maintain identical electrical and mechanical specifications. The 74ACT11257DWR carries Active product status, ensuring continued availability and support from the manufacturer, whereas the 74ACT11257DW is in Last Time Buy status.

Selection between these parts should be based on packaging requirements and supply chain strategy. The Tube packaging format (74ACT11257DW) is suitable for lower-volume applications or manual assembly processes. The Tape & Reel format (74ACT11257DWR) is optimized for automated pick-and-place assembly and higher-volume production environments.

Both parts meet ROHS3 compliance and carry MSL Level 1 rating, confirming suitability for standard manufacturing and storage conditions without moisture sensitivity constraints.

Frequently Asked Questions (FAQ)

Q: Can the 74ACT11257DWR be used as a direct replacement for the 74ACT11257DW?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format (Tube versus Tape & Reel) and product lifecycle status. Substitution is valid for all circuit applications.

Q: What is the significance of the Last Time Buy status on the 74ACT11257DW?

A: Last Time Buy indicates the manufacturer is discontinuing this part number. The 74ACT11257DWR, in Active status, represents the recommended long-term alternative for new designs and ongoing production.

Q: Are there any compatibility concerns when switching from Tube to Tape & Reel packaging?

A: No compatibility concerns exist at the component level. The physical die, electrical performance, and pinout are identical. Packaging format affects only handling, storage, and assembly process compatibility. Verify that your assembly equipment supports Tape & Reel format if transitioning from Tube packaging.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the 74ACT11257DW and 74ACT11257DWR are ROHS3 compliant with MSL Level 1 rating. They are equivalent in regulatory and environmental compliance.

Q: What are the key parameters that define substitution eligibility?

A: Substitution is valid when the following parameters match: 4 x 2:1 circuit configuration, 20-SOIC package, 4.5V ~ 5.5V supply voltage, 24mA output current capability, -40°C ~ 85°C operating temperature range, and surface mount mounting type.