SN74AHCT157D Equivalent & Substitute Parts

Part Overview

The SN74AHCT157D is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This part is classified as Last Time Buy, indicating discontinued production with limited availability. The device operates on a single 4.5V to 5.5V supply and is designed for applications requiring signal multiplexing in digital logic circuits. Due to its Last Time Buy status, identifying equivalent and substitute parts is necessary for design continuity and long-term component sourcing.

Substiute Parts

SN74AHCT157D

Texas InstrumentsIn Stock: 1522SN74AHCT157D Datasheet

Current PartRFQ

SN74AHCT157DR

Texas InstrumentsIn Stock: 2265SN74AHCT157DR Datasheet

MFR RecommendedRFQ

74AHCT157D,118

Nexperia USA Inc.In Stock: 113474AHCT157D,118 Datasheet

MFR RecommendedRFQ

74AHCT157D-Q100J

Nexperia USA Inc.In Stock: 97074AHCT157D-Q100J Datasheet

MFR RecommendedRFQ

SN74AHCT158D

Texas InstrumentsIn Stock: 2646SN74AHCT158D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AHCT157D is determined by the following critical parameters: multiplexer circuit configuration (4 x 2:1), output current capability (8mA/8mA), supply voltage range (4.5V ~ 5.5V), package type (16-SOIC), and surface mount mounting type. Parts meeting these specifications are classified into two categories:

MFR Recommended Substitutes: Parts with identical electrical specifications and active product status, differing only in packaging format (Tape & Reel vs. Tube) or manufacturer source.

Parametric Equivalents: Parts with matching functional specifications but potential variations in operating temperature range or manufacturer, suitable for applications where the primary functional requirements are met.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Active Status Priority): SN74AHCT157DR is the primary substitute, offering identical electrical specifications and active product status from the original manufacturer. The only difference is packaging format (Tape & Reel vs. Tube), which does not affect functional performance.

For Extended Temperature Applications: 74AHCT157D,118 and 74AHCT157D-Q100J both support extended operating temperature range (-40°C ~ 125°C) compared to the original part (-40°C ~ 85°C). These are suitable for applications requiring broader thermal performance.

For Automotive Applications: 74AHCT157D-Q100J includes AEC-Q100 automotive qualification and extended temperature range, making it appropriate for automotive-grade designs.

For Parametric Equivalence: SN74AHCT158D maintains identical electrical specifications and package type but differs in base product number (74AHCT158 vs. 74AHCT157). This part is suitable only when functional equivalence of the 4 x 2:1 multiplexer configuration is confirmed for the specific application.

Frequently Asked Questions (FAQ)

Q: Can SN74AHCT157DR be used as a direct replacement for SN74AHCT157D? A: Yes. Both parts share identical electrical specifications, circuit configuration, supply voltage, output current, and operating temperature range. The difference is packaging format (Tape & Reel vs. Tube), which does not affect circuit performance.

Q: What is the difference between the Nexperia and Texas Instruments versions? A: Both manufacturers produce parts with identical electrical specifications and RoHS3 compliance. The Nexperia versions (74AHCT157D,118 and 74AHCT157D-Q100J) offer extended operating temperature range (-40°C ~ 125°C) and are available in Tape & Reel packaging. Selection depends on temperature requirements and packaging preferences.

Q: Is the 74AHCT157D-Q100J suitable for non-automotive applications? A: Yes. The AEC-Q100 qualification indicates automotive-grade reliability but does not restrict use in non-automotive applications. The extended temperature range (-40°C ~ 125°C) makes it suitable for industrial and high-reliability applications.

Q: How does SN74AHCT158D differ functionally from SN74AHCT157D? A: Both are 4 x 2:1 multiplexers with identical electrical specifications. The difference is in the base product number designation (74AHCT158 vs. 74AHCT157). Functional equivalence must be confirmed through datasheet comparison for the specific application.

Q: What does Last Time Buy status mean for the SN74AHCT157D? A: Last Time Buy indicates the manufacturer has discontinued production. Existing inventory is available but will not be replenished. Active substitute parts (SN74AHCT157DR, 74AHCT157D,118, 74AHCT157D-Q100J) should be considered for new designs or long-term sourcing.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental standards of the original SN74AHCT157D.