74HC157DB,118 Equivalent & Substitute Parts

Part Overview

The 74HC157DB,118 is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Nexperia USA Inc. in a 16-SSOP surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The 74HC157 series provides single-supply operation across a 2V to 6V range with symmetric output current characteristics, suitable for digital signal routing and data selection applications in logic circuits.

Substiute Parts

74HC157DB,118

Nexperia USA Inc.In Stock: 95874HC157DB,118 Datasheet

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74HC157PW,118

Nexperia USA Inc.In Stock: 273274HC157PW,118 Datasheet

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SN74AHC157DBR

Texas InstrumentsIn Stock: 16218SN74AHC157DBR Datasheet

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SN74HC157DBR

Texas InstrumentsIn Stock: 3165SN74HC157DBR Datasheet

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SN74HC157PW

Texas InstrumentsIn Stock: 7157SN74HC157PW Datasheet

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SN74HC157PWR

Texas InstrumentsIn Stock: 2066SN74HC157PWR Datasheet

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SN74HC157PWT

Texas InstrumentsIn Stock: 2043SN74HC157PWT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HC157DB,118 is determined by the following critical parameters:

Circuit configuration (4 x 2:1 multiplexer), single supply voltage operation, and surface mount packaging are the primary substitution criteria. Parts are grouped into two categories based on package type compatibility:

Package-Compatible Substitutes (16-SSOP): Parts maintaining the identical 16-SSOP package footprint allow direct PCB replacement without layout modification. These include SN74HC157DBR and SN74AHC157DBR.

Functional Equivalents with Different Packaging (16-TSSOP): Parts with identical circuit configuration but narrower 16-TSSOP packaging (0.173" width versus 0.209") provide functional equivalence with package footprint differences. These include 74HC157PW,118, SN74HC157PW, SN74HC157PWR, and SN74HC157PWT.

Voltage supply range, operating temperature range, and output current specifications determine electrical compatibility within each group. Series designation (74HC versus 74AHC) indicates performance tier differences.

Parameter Comparison

Engineering Selection Recommendations

Direct Package Replacement (16-SSOP): SN74HC157DBR from Texas Instruments provides identical 16-SSOP packaging with active product status. This part maintains the same footprint as the obsolete 74HC157DB,118 and operates within the full 2V to 6V supply range. Output current is increased to 7.8mA, which is compatible with standard logic loading. Operating temperature range is limited to -40°C to 85°C compared to the original 125°C maximum.

Enhanced Performance Alternative (16-SSOP): SN74AHC157DBR from Texas Instruments offers the same 16-SSOP package with higher output current (8mA) and active product status. The 74AHC series provides improved performance characteristics. Supply voltage range is slightly reduced to 2V to 5.5V, and operating temperature extends to 125°C, matching the original part's thermal range.

Functional Equivalents with Smaller Footprint (16-TSSOP): 74HC157PW,118 from Nexperia USA Inc. and SN74HC157PWR from Texas Instruments provide the same 4 x 2:1 multiplexer function in a narrower 16-TSSOP package. These parts are suitable for space-constrained designs where PCB layout permits package substitution. Both maintain 2V to 6V operation and active product status.

All substitute parts carry ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I use a 16-TSSOP package part as a direct replacement for the 16-SSOP 74HC157DB,118?

A: No. While 16-TSSOP parts provide identical circuit functionality, the package footprint differs (0.173" width versus 0.209" width). PCB layout and land pattern modifications are required. Use 16-TSSOP substitutes only when PCB redesign is acceptable.

Q: What is the difference between 74HC157 and 74AHC157 series parts?

A: The 74AHC series (SN74AHC157DBR) provides higher output current (8mA versus 7.8mA for 74HC) and represents an enhanced performance tier. Both series are functionally compatible 4 x 2:1 multiplexers. The 74AHC variant has a slightly reduced maximum supply voltage (5.5V versus 6V).

Q: Why does the SN74HC157DBR have a lower maximum operating temperature than the original 74HC157DB,118?

A: The SN74HC157DBR from Texas Instruments is specified to -40°C to 85°C, while the original Nexperia part extends to 125°C. If your application requires operation above 85°C, select SN74AHC157DBR (which extends to 125°C) or 74HC157PW,118 from Nexperia.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original 74HC157DB,118 regulatory requirement.

Q: What packaging options are available for the 74HC157 multiplexer?

A: The 74HC157 4 x 2:1 multiplexer is available in two surface mount packages: 16-SSOP (0.209" width) and 16-TSSOP (0.173" width). The TSSOP variant provides a narrower footprint for compact designs. Packaging choice depends on PCB layout constraints and design requirements.

Q: Can I substitute based on output current alone?

A: No. Output current is one of several parameters determining substitution validity. Circuit configuration (4 x 2:1), supply voltage range compatibility, operating temperature requirements, and package footprint must all align with your application needs. Verify all parameters before selection.