XC74WL157ASR Equivalent & Substitute Parts

Part Overview

The XC74WL157ASR is a 1 x 2:1 multiplexer logic integrated circuit manufactured by Torex Semiconductor Ltd in an 8-MSOPB surface mount package. This device is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity. The part operates across a 2V to 5.5V supply voltage range with output drive capability of 8mA for both high and low states, suitable for low-power logic applications requiring signal multiplexing functionality.

Substiute Parts

XC74WL157ASR

Torex Semiconductor LtdIn Stock: 4216XC74WL157ASR Datasheet

Current PartRFQ

SN74LVC2G157DCTR

Texas InstrumentsIn Stock: 3280SN74LVC2G157DCTR Datasheet

SimilarRFQ

TC7WH157FU,LJ(CT

Toshiba Semiconductor and StorageIn Stock: 2704TC7WH157FU,LJ(CT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the XC74WL157ASR is determined by the following critical parameters:

Functional Equivalence: All substitute parts must implement a 1 x 2:1 multiplexer circuit with a single independent circuit configuration.

Electrical Compatibility: Substitute parts must operate within the supply voltage range of 2V to 5.5V and maintain the same operating temperature range of -40°C to 85°C.

Output Drive Capability: The output current specifications (8mA high, 8mA low) establish the minimum drive capability required for direct substitution without circuit redesign.

Package Compatibility: Surface mount packaging in 8-TSSOP or 8-MSOP format with 0.110" (2.80mm) width ensures mechanical and electrical compatibility with existing PCB layouts.

Compliance Requirements: RoHS3 compliance, MSL Level 1, and REACH unaffected status are mandatory for production continuity.

Two substitute parts meet these criteria with varying electrical performance characteristics:

1. SN74LVC2G157DCTR (Texas Instruments): Active product with enhanced output drive capability (32mA) and extended lower supply voltage limit (1.65V).

2. TC7WH157FU,LJ(CT (Toshiba Semiconductor and Storage): Active product with matched output drive capability (8mA) and identical supply voltage range (2V ~ 5.5V).

Parameter Comparison

Engineering Selection Recommendations

For Direct Parametric Replacement: The TC7WH157FU,LJ(CT from Toshiba Semiconductor and Storage provides the closest electrical match to the XC74WL157ASR. Both devices specify identical output drive capability (8mA high, 8mA low) and supply voltage range (2V ~ 5.5V). This part is currently in active production status, ensuring long-term availability and supply chain stability. The package format remains compatible with existing PCB designs.

For Enhanced Performance Applications: The SN74LVC2G157DCTR from Texas Instruments offers increased output drive capability (32mA high, 32mA low) and extended lower supply voltage operation (1.65V minimum). This part is suitable for applications requiring higher output current or operation at reduced supply voltages. The device maintains the same operating temperature range and package compatibility. This part is in active production status.

Compliance Verification: Both substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status, meeting regulatory requirements equivalent to the original XC74WL157ASR.

Frequently Asked Questions (FAQ)

Q: Can the SN74LVC2G157DCTR directly replace the XC74WL157ASR without circuit modifications?

A: The SN74LVC2G157DCTR is functionally compatible as a 1 x 2:1 multiplexer with identical circuit configuration and operating temperature range. The increased output drive capability (32mA versus 8mA) is a superset of the original specification and does not require circuit modifications. The extended lower supply voltage limit (1.65V) provides additional operational flexibility. Package compatibility is maintained.

Q: What is the primary difference between the two substitute parts?

A: The TC7WH157FU,LJ(CT provides parametric equivalence with matched output drive capability (8mA) and identical supply voltage range (2V ~ 5.5V). The SN74LVC2G157DCTR offers enhanced output drive capability (32mA) and extended lower supply voltage operation (1.65V). Both parts maintain functional equivalence as 1 x 2:1 multiplexers with identical circuit configuration.

Q: Are the package formats interchangeable between the main part and substitutes?

A: The TC7WH157FU,LJ(CT uses 8-TSSOP packaging, identical to the XC74WL157ASR. The SN74LVC2G157DCTR uses 8-LSSOP packaging. Both package formats maintain the 0.110" (2.80mm) width specification and are compatible with standard 8-pin surface mount PCB layouts. Verification of specific PCB footprint requirements is necessary for the SN74LVC2G157DCTR due to the LSSOP variant.

Q: Do all substitute parts meet the same compliance and regulatory requirements?

A: Both substitute parts are ROHS3 compliant, carry MSL Level 1 rating, and are REACH unaffected, matching the compliance profile of the XC74WL157ASR.

Q: Why is the XC74WL157ASR classified as obsolete?

A: The XC74WL157ASR is listed as obsolete by the manufacturer. The active substitute parts identified (SN74LVC2G157DCTR and TC7WH157FU,LJ(CT) provide equivalent or enhanced functionality with confirmed ongoing production status.