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FST3125QSCX — TSSOP / SSOP / MSOP package (representative)
TSSOP / SSOP / MSOP
Representative of package type
onsemi (Fairchild)

FST3125QSCX

Bus Switch · QSOP-16 · Interface
Part Status: Obsolete In demand
Data last refreshed Jul 28, 2026
Manufacturer
onsemi (Fairchild)
Mfr Part #
FST3125QSCX
Series
FST3125
Category
Bus Switch
Datasheet
View datasheet ↗
Availability & Pricing
Unit PriceRequest a Quote
Sourcing channels3
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Live pricing on request · most quotes same business day

Product Attributes

Electrical & Parametric
On Resistance4Ω typ
Vcc4.5V~5.5V
Physical & Thermal
Package / CaseQSOP-16
Mounting TypeSurface Mount
SeriesFST3125
Operating Temperature-40°C ~ 85°C
Classification & Lifecycle
CategoryBus Switch
TypeInterface
Part StatusObsolete

Quad 4-bit FET bus switch, individual output enables, 5V tolerant

Environmental & Export Classifications

RoHS Status
RoHS Compliant

Availability & Sourcing

3 sources
SourceMfrQtyDate CodeConditionStatus
Market ONSEMI 181540 — — Available RFQ
Market FSC 306 — — Available RFQ
Market FAIRCHILD 1205 05+ — Available RFQ

ZDI Stock — in our warehouse · Market — offers available through our sourcing network · Live — recent offers from our sourcing network.

Part Activity

recent searches, RFQs & offers
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FST3125QSCX viewed on the web · Web User
FST3125QSCX viewed on the web · Web User
FST3125QSCX viewed on the web · Web User
FST3125QSCX viewed on the web · Web User
FST3125QSCX viewed on the web · Web User
FST3125QSCX viewed on the web · Web User

Recent search and sourcing activity for FST3125QSCX.

Engineering FAQ

FST3125QSCX is marked Obsolete — how does ZDI assure authenticity?
Obsolete and end-of-life parts carry elevated counterfeit risk, which is exactly why ZDI routes every lot through the full EQuality Process™ — validation, QI-1 and QI-2/camera inspection, RoHS verification, bake and bag-and-tag, and QI-3 final inspection — with source-country supplier vetting and full lot traceability before release.
What are the key specifications of FST3125QSCX?
On Resistance: 4Ω typ; Vcc: 4.5V~5.5V.
What package is FST3125QSCX supplied in?
FST3125QSCX is supplied in the QSOP-16 package, surface mount, rated -40°C ~ 85°C.
Can ZDI source FST3125QSCX beyond the quantities shown?
Yes — ZD Integrated Circuits specializes in sourcing hard-to-find, obsolete, and excess electronic components through its global network, with counterfeit-avoidance inspection on every lot. Submit an RFQ with your target quantity for availability and pricing.

Documents & Media

Quality & Counterfeit Avoidance

ISO 9001 ERAI Member ESD Certified GIDEP Participant ZDI EQuality Process CAGE Code 1V8K2

ZD Integrated Circuits operates an ISO 9001-certified quality system incorporating JEDEC-standard process-control elements. In an era of global sourcing and internet procurement, standards compliance alone no longer assures component authenticity — so ZDI pioneered a multi-layered counterfeit-avoidance program: supplier analysis at the source-country level, detailed component analysis, defined inspection standards for all incoming devices, and stringent supplier rating and review. These programs let ZDI guarantee the integrity and the source of every component it ships.

Every lot moves through ZDI's EQuality Process™ — validation, QI-1 and QI-2/camera inspection, RoHS verification, bake and bag-and-tag, and QI-3 final inspection — with Quality-Manager disposition before release. Nonconforming material is quarantined; conforming material is warehoused or shipped.

✓Multi-stage EQuality Process™ inspection (QI-1 · QI-2/camera · QI-3)
✓Source-country supplier analysis, rating & review
✓Incoming inspection, RoHS verification, bake, full lot traceability
✓ESD-controlled handling · authentic parts guaranteed

FST3125QSCX is marked Obsolete. Obsolete and end-of-life parts carry elevated counterfeit risk — exactly why ZDI routes them through the full EQuality Process™ with source-country supplier vetting, inspection, and traceability.

Need FST3125QSCX?

ZD Integrated Circuits sources hard-to-find, obsolete, and excess components worldwide — pricing and availability, fast.

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