74HCT157DR2G Equivalent & Substitute Parts

Part Overview

The 74HCT157DR2G is a 4 x 2:1 multiplexer logic integrated circuit manufactured by onsemi in 16-SOIC surface mount packaging. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The 74HCT157 series provides single-supply operation with standard TTL-compatible logic levels, suitable for signal routing and data selection applications in digital systems.

Substiute Parts

74HCT157DR2G

onsemiIn Stock: 101874HCT157DR2G Datasheet

Current PartRFQ

74HCT157D,652

NXP SemiconductorsIn Stock: 1789974HCT157D,652 Datasheet

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74HCT157D,653

Nexperia USA Inc.In Stock: 128774HCT157D,653 Datasheet

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CD74HCT157M

Harris CorporationIn Stock: 2111CD74HCT157M Datasheet

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SN74HCT157D

Texas InstrumentsIn Stock: 2256SN74HCT157D Datasheet

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SN74HCT157DR

Texas InstrumentsIn Stock: 2216SN74HCT157DR Datasheet

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SN74HCT157DT

Texas InstrumentsIn Stock: 2193SN74HCT157DT Datasheet

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CD74HCT157M96

Texas InstrumentsIn Stock: 4962CD74HCT157M96 Datasheet

Parametric EquivalentRFQ

CD74HCT157MT

Texas InstrumentsIn Stock: 2385CD74HCT157MT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT157DR2G is determined by strict equivalence in the following parameters:

• Circuit Configuration: 4 x 2:1 multiplexer topology
• Package Type: 16-SOIC surface mount form factor
• Voltage Supply Range: 4.5V ~ 5.5V single supply
• Mounting Type: Surface mount
• Base Product Number: 74HCT157 series

Substitute parts are grouped into two categories:

Direct Substitutes (identical electrical and mechanical specifications): Parts with matching output current (4mA/4mA), operating temperature range (-55°C ~ 125°C), and active or bulk packaging status.

Parametric Equivalents (functionally compatible with minor parameter variations): Parts with the same circuit configuration and package but different output current ratings (6mA/6mA) or narrower operating temperature ranges (-40°C ~ 85°C). These remain electrically compatible within the 74HCT157 logic family but may have different performance characteristics in extended temperature applications.

Parameter Comparison

Engineering Selection Recommendations

For Extended Temperature Applications (-55°C ~ 125°C):

Select from parts with matching temperature range: CD74HCT157M96 (Texas Instruments, active status, ROHS3 compliant) or CD74HCT157MT (Texas Instruments, last time buy status, ROHS3 compliant). Both maintain 4mA/4mA output current specification and are available in tape & reel packaging for automated assembly.

For Standard Temperature Range (-40°C ~ 85°C):

SN74HCT157DR (Texas Instruments, active status) provides the most current availability with ROHS3 compliance. Output current is rated at 6mA/6mA, which is compatible with 74HCT logic family applications. Available in cut tape and digi-reel packaging.

For Active Product Status Priority:

74HCT157D,652 (NXP Semiconductors) or 74HCT157D,653 (Nexperia USA Inc.) are both active products with 4mA/4mA output current matching the original specification. Both support the -40°C ~ 125°C operating range and are REACH compliant.

For Compliance Requirements:

All active and last-time-buy substitute parts listed carry ROHS3 compliance certification. The original 74HCT157DR2G and CD74HCT157M are not ROHS3 compliant. Verify compliance requirements before final selection.

Frequently Asked Questions (FAQ)

Q: Can I use SN74HCT157DR as a direct replacement for 74HCT157DR2G?

A: SN74HCT157DR is electrically compatible within the 74HCT157 logic family. However, it has higher output current (6mA vs 4mA) and a narrower operating temperature range (-40°C ~ 85°C vs -55°C ~ 125°C). It is suitable for standard temperature applications where extended low-temperature operation is not required.

Q: What is the difference between 74HCT157D,652 and 74HCT157D,653?

A: Both parts are manufactured by NXP/Nexperia with identical electrical specifications (4mA/4mA output, -40°C ~ 125°C operating range, 16-SOIC package). The primary difference is packaging: 74HCT157D,652 is supplied in bulk, while 74HCT157D,653 is supplied in tape & reel format for automated pick-and-place assembly.

Q: Are all substitute parts in 16-SOIC packaging?

A: Yes. All substitute parts listed maintain the 16-SOIC (0.154", 3.90mm width) surface mount package, ensuring mechanical and electrical compatibility with existing PCB designs.

Q: Which substitute part has the longest product life availability?

A: CD74HCT157M96 and SN74HCT157DR both have active product status. CD74HCT157M96 maintains the original -55°C ~ 125°C temperature specification, while SN74HCT157DR is currently the most widely available option from Texas Instruments with active status.

Q: Do all parts meet REACH compliance?

A: All substitute parts listed carry REACH Unaffected or REACH compliant status. The original 74HCT157DR2G is REACH Unaffected. Verify specific REACH documentation requirements for your application and region.