MC74LCX257DTG vs SN74LVC257APWR: replacement comparison
Start with the best mapped replacement options for MC74LCX257DTG, including pin-to-pin, functional, and cross-reference alternatives. Review the overview and core specifications, then submit an RFQ when the fit looks right.
SN74LVC257APWR is a P2P-review candidate for MC74LCX257DTG; confirm pinout, package, logic thresholds, timing, and lifecycle scope before production approval.
SN74LVC257APWR is mapped as a possible replacement for MC74LCX257DTG. Verify package, lifecycle, stock, datasheet, and key attributes before approval.
Manufacturer
Texas Instruments
Package
TSSOP-16
Series
SN74LVC257A
Category
Integrated Circuits (ICs)
Stock
20,000
Available
12,000
Min Order
1
Datasheet
Available
Key Attributes: -
Matches
✓Package: TSSOP-16
✓Category: Integrated Circuits (ICs)
✓Subcategory: Logic - Signal Switches, Multiplexers, Decoders
✓Function: Quad 2:1 multiplexer/data selector
Differences
•Series: MC74LCX257 vs SN74LVC257A
•Part Number: MC74LCX257DTG vs SN74LVC257APWR
•Manufacturer: onsemi vs Texas Instruments
•Supply Voltage: 2.3 V to 3.6 V class vs 1.65 V to 3.6 V
Must verify
→Confirm the complete pinout; a mapped pin-to-pin relationship is not final approval.
→Check electrical limits and test conditions in both manufacturer datasheets.
→Confirm qualification, compliance, and internal approval requirements.
74LVC257APW,118 is a P2P-review candidate for MC74LCX257DTG; confirm pinout, package, logic thresholds, timing, and lifecycle scope before production approval.
74LVC257APW,118 is mapped as a possible replacement for MC74LCX257DTG. Verify package, lifecycle, stock, datasheet, and key attributes before approval.
Manufacturer
Nexperia
Package
TSSOP-16
Series
74LVC257A
Category
Integrated Circuits (ICs)
Stock
20,000
Available
12,000
Min Order
1
Datasheet
Available
Key Attributes: -
Matches
✓Package: TSSOP-16
✓Category: Integrated Circuits (ICs)
✓Subcategory: Logic - Signal Switches, Multiplexers, Decoders
✓Mounting Type: Surface Mount
Differences
•Series: MC74LCX257 vs 74LVC257A
•Function: Quad 2:1 multiplexer/data selector vs Quad 2-input multiplexer
•Part Number: MC74LCX257DTG vs 74LVC257APW,118
•Manufacturer: onsemi vs Nexperia
Must verify
→Confirm the complete pinout; a mapped pin-to-pin relationship is not final approval.
→Check electrical limits and test conditions in both manufacturer datasheets.
→Confirm qualification, compliance, and internal approval requirements.
74LCX257MTCX is a P2P-review candidate for MC74LCX257DTG; confirm pinout, package, logic thresholds, timing, and lifecycle scope before production approval.
74LCX257MTCX is mapped as a possible replacement for MC74LCX257DTG. Verify package, lifecycle, stock, datasheet, and key attributes before approval.
Manufacturer
onsemi
Package
TSSOP-16
Series
74LCX257
Category
Integrated Circuits (ICs)
Stock
20,000
Available
12,000
Min Order
1
Datasheet
Available
Key Attributes: -
Matches
✓Package: TSSOP-16
✓Category: Integrated Circuits (ICs)
✓Subcategory: Logic - Signal Switches, Multiplexers, Decoders
✓Function: Quad 2:1 multiplexer/data selector
Differences
•Series: MC74LCX257 vs 74LCX257
•Part Number: MC74LCX257DTG vs 74LCX257MTCX
Must verify
→Confirm the complete pinout; a mapped pin-to-pin relationship is not final approval.
→Check electrical limits and test conditions in both manufacturer datasheets.
→Confirm qualification, compliance, and internal approval requirements.
SN74LVC257AQPWRG4Q1 is a functional replacement path for MC74LCX257DTG; package, rail, qualification, or threshold differences require engineering review.
SN74LVC257AQPWRG4Q1 is mapped as a possible replacement for MC74LCX257DTG. Verify package, lifecycle, stock, datasheet, and key attributes before approval.
Manufacturer
Texas Instruments
Package
TSSOP-16
Series
SN74LVC257A-Q1
Category
Integrated Circuits (ICs)
Stock
20,000
Available
12,000
Min Order
1
Datasheet
Available
Key Attributes: -
Matches
✓Package: TSSOP-16
✓Category: Integrated Circuits (ICs)
✓Subcategory: Logic - Signal Switches, Multiplexers, Decoders
✓Mounting Type: Surface Mount
Differences
•Series: MC74LCX257 vs SN74LVC257A-Q1
•Function: Quad 2:1 multiplexer/data selector vs Automotive quad 2:1 multiplexer
•Part Number: MC74LCX257DTG vs SN74LVC257AQPWRG4Q1
•Manufacturer: onsemi vs Texas Instruments
Must verify
→Confirm functional behavior and application-level compatibility.
→Check electrical limits and test conditions in both manufacturer datasheets.
→Confirm qualification, compliance, and internal approval requirements.
SN74CBTLV3257PWR is a similar redesign candidate for MC74LCX257DTG; validate output polarity or pass-switch behavior before use.
SN74CBTLV3257PWR is mapped as a possible replacement for MC74LCX257DTG. Verify package, lifecycle, stock, datasheet, and key attributes before approval.
Manufacturer
Texas Instruments
Package
TSSOP-16
Series
SN74CBTLV3257
Category
Integrated Circuits (ICs)
Stock
20,000
Available
12,000
Min Order
1
Datasheet
Available
Key Attributes: -
Matches
✓Package: TSSOP-16
✓Category: Integrated Circuits (ICs)
✓Subcategory: Logic - Signal Switches, Multiplexers, Decoders
✓Mounting Type: Surface Mount
Differences
•Series: MC74LCX257 vs SN74CBTLV3257
•Function: Quad 2:1 multiplexer/data selector vs 4-bit 1-of-2 FET multiplexer/bus switch
•Part Number: MC74LCX257DTG vs SN74CBTLV3257PWR
•Manufacturer: onsemi vs Texas Instruments
Must verify
→Confirm functional behavior and application-level compatibility.
→Check electrical limits and test conditions in both manufacturer datasheets.
→Confirm qualification, compliance, and internal approval requirements.
Specification view
Parameter Comparison Chart
A side-by-side view of the source part and its mapped alternatives so buyers and engineers can screen package, availability, lifecycle, and key descriptors before RFQ.
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MC74LCX257DTG is an onsemi low-voltage CMOS quad 2:1 multiplexer with 3-state non-inverting outputs in TSSOP-16.
TI SN74LVC257APWR is an active LVC quad 2:1 multiplexer with 3-state non-inverting outputs in TSSOP-16.
Nexperia 74LVC257APW,118 is an active LVC quad 2-input multiplexer with 3-state outputs in TSSOP-16.
onsemi 74LCX257MTCX is a same-family quad 2:1 multiplexer candidate in TSSOP-16.
TI SN74LVC257ADBR is an LVC quad 2:1 multiplexer in SSOP-16 for functional redesign paths.
TI SN74LVC257AQPWRG4Q1 is an automotive-qualified LVC257 TSSOP-16 replacement path.
TI SN74HCT257DR is a 5 V HCT quad 2:1 multiplexer with 3-state outputs in SOIC-16.
TI SN74LVC258APWR is an active LVC quad 2:1 inverting multiplexer with 3-state outputs in TSSOP-16.
TI SN74CBTLV3257PWR is a low-voltage FET multiplexer/bus-switch style redesign candidate.
Lifecycle
Obsolete
-
-
-
-
-
-
-
-
Stock
20,000
20,000
20,000
20,000
20,000
20,000
20,000
20,000
20,000
Available
12,000
12,000
12,000
12,000
12,000
12,000
12,000
12,000
12,000
Min Order
1
1
1
1
1
1
1
1
1
Datasheet
Available
Available
Available
Available
Available
Available
Available
Available
Available
Function
Quad 2:1 multiplexer/data selector
Quad 2:1 multiplexer/data selector
Quad 2-input multiplexer
Quad 2:1 multiplexer/data selector
Quad 2:1 multiplexer/data selector
Automotive quad 2:1 multiplexer
Quad 2:1 multiplexer/data selector
Quad 2:1 multiplexer/data selector
4-bit 1-of-2 FET multiplexer/bus switch
Part Number
MC74LCX257DTG
SN74LVC257APWR
74LVC257APW,118
74LCX257MTCX
SN74LVC257ADBR
SN74LVC257AQPWRG4Q1
SN74HCT257DR
SN74LVC258APWR
SN74CBTLV3257PWR
Mounting Type
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Surface Mount
Manufacturer
onsemi
Texas Instruments
Nexperia
onsemi
Texas Instruments
Texas Instruments
Texas Instruments
Texas Instruments
Texas Instruments
Package / Case
TSSOP-16
TSSOP-16
TSSOP-16
TSSOP-16
SSOP-16
TSSOP-16
SOIC-16
TSSOP-16
TSSOP-16
Series
MC74LCX257
SN74LVC257A
74LVC257A
74LCX257
SN74LVC257A
SN74LVC257A-Q1
SN74HCT257
SN74LVC258A
SN74CBTLV3257
Output Type
3-state, non-inverting
3-state, non-inverting
3-state, non-inverting
3-state, non-inverting
3-state, non-inverting
3-state, non-inverting
3-state, non-inverting
3-state, inverting
Pass switch
Supply Voltage
2.3 V to 3.6 V class
1.65 V to 3.6 V
1.2 V to 3.6 V class
2.3 V to 3.6 V class
1.65 V to 3.6 V
2.7 V to 3.6 V class
4.5 V to 5.5 V
1.1 V to 3.6 V
Low-voltage bus-switch class
Lifecycle Status
Product Discontinuance notice PD27554X
-
-
-
-
-
-
-
-
Publication Context
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
onsemi PD27554X replacement research wave
Validation Required
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Confirm datasheet pinout, package land pattern, logic thresholds, timing, and lifecycle status before production substitution.
Actions
Cross-reference FAQ
Replacement Part Questions
Short answers for teams reviewing MC74LCX257DTG replacement and equivalent-part options.
What is a cross-reference page for MC74LCX257DTG?
This page groups mapped replacement options for MC74LCX257DTG so buyers and engineers can compare alternatives before requesting a quote or approving a substitute.
Does a mapped alternative mean a guaranteed drop-in replacement for MC74LCX257DTG?
Not automatically. Cross-reference mapping helps shortlist candidates, but package, electrical behavior, qualification scope, and approval rules still need to be checked before release.
Which parameters should teams compare first for MC74LCX257DTG alternatives?
Start with package, series, key attributes, lifecycle status, stock position, datasheet access, and the mapped pin-to-pin or cross-reference note. Then confirm application-specific requirements in the datasheet and RFQ stage.
Can I request a quote for an alternative to MC74LCX257DTG?
Yes. Use the product links or RFQ actions on this page to request pricing, availability, documentation, and sourcing support for any listed alternative part.
Is MC74LCX257DTG obsolete, and what replacement should buyers review first?
Check the lifecycle row on this page first. If buyers need a fast starting point, the strongest mapped replacement currently surfaced here is SN74LVC257APWR, followed by the other alternatives shown in the comparison table.
Is SN74LVC257APWR a replacement for MC74LCX257DTG?
SN74LVC257APWR is mapped as a P2P option for MC74LCX257DTG, not as an automatically approved drop-in replacement. Compare package, pinout, electrical limits, lifecycle, and qualification requirements before release.
Engineering support
Need help validating the replacement path?
If your team is unsure whether a mapped alternative to MC74LCX257DTG from onsemi is really usable, contact us for help on package fit, pin compatibility, key parameter gaps, and qualification-facing review questions.
Contact a hardware engineer
Email our engineering support contact at [email protected], or use the contact page if the question should be routed across sourcing, engineering, and support.
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Package and pin compatibility
Review whether the alternate path looks credible from package, footprint, and pin-level perspectives.
tune
Parameter and function gaps
Surface the electrical, interface, or application-fit questions that still need confirmation before approval.
task_alt
Qualification and approval prep
Organize the documentation, datasheet evidence, and validation checkpoints your internal team may still require.
