SN74LVC157AQDREP Equivalent & Substitute Parts

Part Overview

The SN74LVC157AQDREP is a 4 x 2:1 multiplexer logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This device is classified as Active product status and operates across a supply voltage range of 2V to 3.6V with an operating temperature range of -40°C to 125°C. The SN74LVC157AQDREP serves as a data selector in digital logic applications where multiple input signals must be routed to a single output based on control logic. Equivalent and substitute parts are identified based on matching functional specifications, electrical parameters, and package compatibility to ensure direct replacement capability in circuit designs.

Key Parameters

Parameter	Value
Type	Multiplexer
Circuit Configuration	4 x 2:1
Independent Circuits	1
Output Current (High/Low)	24mA / 24mA
Voltage Supply	2V ~ 3.6V
Operating Temperature	-40°C ~ 125°C
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SN74LVC157AQDREP are grouped based on the following substitution criteria:

Primary Equivalence Parameters:

Circuit configuration: 4 x 2:1 multiplexer topology
Output current capability: 24mA high and low
Supply voltage range: 2V to 3.6V minimum compatibility
Package: 16-SOIC surface mount form factor
Functional classification: Logic multiplexer

Parametric Equivalent Parts maintain identical electrical specifications and package requirements, differing only in manufacturer or qualification grade. These parts are direct functional replacements.

Manufacturer Recommended Parts are cross-referenced alternatives from different semiconductor manufacturers that meet the core functional and electrical requirements while maintaining package compatibility.

Parameter Comparison

Part Number	Manufacturer	Circuit	Output Current (mA)	Supply Voltage (V)	Operating Temp (°C)	Package	Product Status
SN74LVC157AQDREP	Texas Instruments	4 x 2:1	24 / 24	2.0 ~ 3.6	-40 ~ 125	16-SOIC	Active
SN74LVC157AQDRG4Q1	Texas Instruments	4 x 2:1	24 / 24	2.0 ~ 3.6	-40 ~ 125	16-SOIC	Active
SN74LVC257AQDRG4Q1	Texas Instruments	4 x 2:1	24 / 24	2.0 ~ 3.6	-40 ~ 125	16-SOIC	Active
74LCX157M	Fairchild Semiconductor	4 x 2:1	24 / 24	2.0 ~ 3.6	-40 ~ 85	16-SOIC	Active
74LCX157MX	Fairchild Semiconductor	4 x 2:1	24 / 24	2.0 ~ 3.6	-40 ~ 85	16-SOIC	Active
74LVC157AD,118	NXP Semiconductors	4 x 2:1	24 / 24	1.2 ~ 3.6	-40 ~ 125	16-SOIC	Active
MC74LCX157DR2G	onsemi	4 x 2:1	24 / 24	2.0 ~ 3.6	-40 ~ 85	16-SOIC	Active

Engineering Selection Recommendations

Texas Instruments SN74LVC157AQDRG4Q1 is a parametric equivalent with identical electrical specifications and operating temperature range. This part carries AEC-Q100 automotive qualification, making it suitable for applications requiring automotive-grade components while maintaining full compatibility with the original SN74LVC157AQDREP.

Texas Instruments SN74LVC257AQDRG4Q1 provides equivalent functionality with identical electrical parameters and temperature range. The primary difference is packaging format (Cut Tape versus Tape & Reel), which affects procurement and assembly processes but not electrical performance.

NXP Semiconductors 74LVC157AD,118 extends the lower supply voltage limit to 1.2V, providing broader voltage compatibility while maintaining the full -40°C to 125°C operating temperature range. This part is supplied in bulk packaging.

Fairchild Semiconductor 74LCX157M and 74LCX157MX are manufacturer-recommended alternatives with identical electrical specifications within the 2V to 3.6V range. These parts operate to 85°C maximum, which is suitable for commercial and industrial applications not requiring the full 125°C upper temperature limit.

onsemi MC74LCX157DR2G is a manufacturer-recommended cross-reference with matching electrical parameters and 16-SOIC packaging. Operating temperature is limited to 85°C, and RoHS3 compliance is confirmed.

All substitute parts maintain Active product status and are available in quantities supporting production requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74LVC157AQDRG4Q1 replace SN74LVC157AQDREP in all applications?

A: Yes. Both parts are parametric equivalents with identical circuit configuration (4 x 2:1), output current (24mA), supply voltage range (2V to 3.6V), operating temperature range (-40°C to 125°C), and 16-SOIC package. The primary difference is AEC-Q100 automotive qualification on the G4Q1 variant.

Q: What is the difference between SN74LVC257AQDRG4Q1 and SN74LVC157AQDRG4Q1?

A: Both parts are electrically identical with matching specifications. The difference is in packaging format: SN74LVC257AQDRG4Q1 is supplied in Cut Tape (CT) while SN74LVC157AQDRG4Q1 is supplied in Tape & Reel (TR). Electrical performance and pin configuration are identical.

Q: Are Fairchild 74LCX157M and 74LCX157MX suitable replacements?

A: These parts are suitable for applications operating within -40°C to 85°C temperature range. They match the 4 x 2:1 circuit configuration, 24mA output current, 2V to 3.6V supply voltage, and 16-SOIC package. Applications requiring operation above 85°C require Texas Instruments or NXP alternatives.

Q: Does NXP 74LVC157AD,118 offer any advantage over the original part?

A: The NXP part extends the lower supply voltage limit to 1.2V, enabling operation in low-voltage applications. It maintains the full -40°C to 125°C operating temperature range and identical 4 x 2:1 multiplexer functionality. Packaging is supplied in bulk format rather than tape and reel.

Q: What packaging formats are available for these substitute parts?

A: Texas Instruments parts are available in Tape & Reel (TR) or Cut Tape (CT) formats. NXP 74LVC157AD,118 is supplied in Bulk packaging. Fairchild and onsemi parts do not specify packaging format in the provided data. All parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package.

Q: Are all substitute parts RoHS3 compliant?

A: Texas Instruments SN74LVC157AQDREP, SN74LVC157AQDRG4Q1, SN74LVC257AQDRG4Q1, onsemi MC74LCX157DR2G, and NXP 74LVC157AD,118 are confirmed ROHS3 compliant. Fairchild 74LCX157M and 74LCX157MX do not specify RoHS status in the provided data.

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