74LVC257AD,112 Equivalent & Substitute Parts

Part Overview

The 74LVC257AD,112 is a 4 x 2:1 multiplexer logic IC manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The 74LVC257 series provides single-supply operation across a wide voltage range, making it suitable for low-voltage digital switching applications requiring multiple independent multiplexing channels.

Substiute Parts

74LVC257AD,112

Nexperia USA Inc.In Stock: 70074LVC257AD,112 Datasheet

Current PartRFQ

74LCX257MX

Fairchild SemiconductorIn Stock: 1017474LCX257MX Datasheet

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MC74LCX257DR2G

onsemiIn Stock: 1690MC74LCX257DR2G Datasheet

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SN74LVC257AD

Texas InstrumentsIn Stock: 1362SN74LVC257AD Datasheet

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SN74LVC257ADR

Texas InstrumentsIn Stock: 4926SN74LVC257ADR Datasheet

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SN74LVC257AQDRG4Q1

Texas InstrumentsIn Stock: 5486SN74LVC257AQDRG4Q1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74LVC257AD,112 is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain the identical 4 x 2:1 multiplexer circuit configuration with 1 independent circuit, ensuring pin-compatible operation in existing designs.

Package Compatibility: All substitutes are housed in 16-SOIC (0.154", 3.90mm Width) surface mount packages, maintaining mechanical and electrical compatibility with PCB layouts designed for the original part.

Output Current Capability: The original part specifies 24mA output current (both high and low). Substitutes with 24mA output current provide direct replacement capability. The MC74LCX257DR2G variant with 8mA output current represents a reduced-current alternative suitable only for applications with lower current demands.

Supply Voltage Range: The original part operates from 1.2V to 3.6V. Substitutes with overlapping or extended voltage ranges maintain compatibility. Parts with narrower ranges (2V ~ 3.6V or 2.3V ~ 3.6V) are suitable for applications not requiring the full lower voltage capability.

Operating Temperature Range: The original part supports -40°C to 125°C. Substitutes with identical or extended temperature ranges provide direct replacement. The SN74LVC257AQDRG4Q1 automotive-grade variant extends to 125°C and includes AEC-Q100 qualification for automotive applications.

Product Status and Compliance: Active-status substitutes ensure ongoing availability and support. All substitutes maintain ROHS3 compliance and MSL 1 rating, matching the original part's environmental and regulatory requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Full Compatibility): The SN74LVC257ADR and SN74LVC257AD from Texas Instruments provide direct replacement capability. Both maintain 24mA output current, support the extended -40°C to 85°C operating range, and are actively manufactured with ROHS3 compliance. The SN74LVC257ADR is supplied in Tape & Reel packaging with 4,844 units in stock, while SN74LVC257AD is supplied in Tube packaging with 1,258 units in stock.

Extended Temperature Capability: The SN74LVC257AQDRG4Q1 automotive-grade variant extends the upper operating temperature to 125°C, matching the original part's temperature range. This part includes AEC-Q100 qualification and is suitable for applications requiring automotive-grade reliability. It maintains 24mA output current and is available in Cut Tape packaging with 5,426 units in stock.

Reduced Current Alternative: The MC74LCX257DR2G from onsemi provides a functionally equivalent 4 x 2:1 multiplexer with reduced output current (8mA). This variant is suitable only for applications with lower current demands and operates across 2.3V to 3.6V. It is actively manufactured with 1,627 units in stock and includes ROHS3 compliance.

Legacy Series Alternative: The 74LCX257MX from Fairchild Semiconductor represents the 74LCX series equivalent with 24mA output current. It operates across 2V to 3.6V and supports -40°C to 85°C. This part is actively manufactured with 10,114 units in stock, providing high availability for legacy designs.

Obsolescence Mitigation: Given the obsolete status of the original 74LVC257AD,112, immediate transition to an active substitute is recommended. The Texas Instruments SN74LVC257ADR offers the highest inventory availability (4,844 units) combined with full parameter compatibility and active product status.

Frequently Asked Questions (FAQ)

Q: Can the MC74LCX257DR2G be used as a direct replacement for the 74LVC257AD,112?

A: The MC74LCX257DR2G maintains functional equivalence in circuit configuration and package, but the reduced output current (8mA versus 24mA) limits its use to applications with lower current demands. Verify that your circuit design does not require the full 24mA output capability before substitution.

Q: What is the difference between the 74LVC and 74LCX series?

A: Both series provide 4 x 2:1 multiplexer functionality in identical 16-SOIC packages. The primary differences are voltage supply ranges and output current specifications. The 74LVC series (Nexperia, Texas Instruments) typically supports lower minimum supply voltages (1.2V to 1.65V), while the 74LCX series (Fairchild, onsemi) operates from 2V minimum.

Q: Are all substitute parts pin-compatible with the original 74LVC257AD,112?

A: Yes. All substitute parts maintain the identical 4 x 2:1 multiplexer circuit configuration and 16-SOIC package footprint, ensuring pin-for-pin compatibility in existing PCB designs.

Q: Which substitute offers the best long-term availability?

A: The SN74LVC257ADR from Texas Instruments is actively manufactured with 4,844 units in current stock, providing strong availability. The SN74LVC257AQDRG4Q1 automotive variant also offers active status with 5,426 units in stock and extended temperature support to 125°C.

Q: Can I use the SN74LVC257AQDRG4Q1 in non-automotive applications?

A: Yes. The SN74LVC257AQDRG4Q1 automotive-grade variant meets or exceeds the electrical specifications of standard-grade parts and can be used in any application. Its AEC-Q100 qualification and extended temperature range (-40°C to 125°C) provide additional design margin for demanding environments.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in multiple packaging formats: Tape & Reel (SN74LVC257ADR, MC74LCX257DR2G), Tube (SN74LVC257AD), and Cut Tape (SN74LVC257AQDRG4Q1). Select packaging based on production volume and handling requirements.

Q: Are all substitutes RoHS3 compliant?

A: All substitute parts listed are ROHS3 compliant except the 74LCX257MX, for which RoHS status is not specified. Verify RoHS compliance with the supplier if this is a requirement for your application.