Alternatives to STMicroelectronics L4981AD013TR

STMicroelectronics L4981AD013TR and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for STMicroelectronics L4981AD013TR

L4981AD013TR compared against its qualified second sources
	L4981AD013TRSTMicroelectronics	L4981BD013TRSTMicroelectronics	UC3854BDWTexas Instruments
FFF Compatibility
AI Summary	L4981AD013TR by STMicroelectronics: PFC IC Average Current 100kHz 20-SO.	The L4981BD013TR is the frequency-modulated sibling of the L4981AD013TR in the same SO20 package. When pin 16 is grounded, it operates in fixed-frequency mode matching the target part, though external SYNC clock input functionality is not supported on pin 16. Same L4981 family average current mode PFC architecture Identical SO20 (20-lead SOIC 300 mil) surface-mount footprint and physical package Matches supply voltage range (14.5V to 19.5V) and operating temperature (-40°C to 125°C) Pin 16 is FREQ-MOD instead of SYNC (pin 16 must be grounded for fixed-frequency operation, losing external clock SYNC function)	The UC3854BDW is the commercial-grade variant of the UC2854B average current mode PFC controller. It shares similar functional control topology but is limited to 0°C to 70°C operating ambient temperature and uses a 16-pin SOIC footprint. Industry-standard average current mode PFC controller in wide SOIC-16 package Wide supply voltage range up to 20V Commercial operating temperature range (0°C to 70°C vs -40°C to 125°C) Different pinout and pin count (16-pin SOIC vs 20-pin SO20)
Lifecycle Status	Active	Active	Active
Market Availability	In stock	In stock	In stock
REACH	REACH	REACH	REACH
RoHS	RoHS	RoHS	RoHS
——— ————	————— ——— ————	———— ——————	—— ————— ———
—————— ——	——————— ————	————— ——— ————	———— ——————
———— ———	—— ————— ———	——————— ————	————— ——— ————
—— —————	———— ——————	—— ————— ———	——————— ————
——— ————	————— ——— ————	———— ——————	—— ————— ———
—————— ——	——————— ————	————— ——— ————	———— ——————
———— ———	—— ————— ———	——————— ————	————— ——— ————
—— —————	———— ——————	—— ————— ———	——————— ————

Unlock all 5 alternatives

Sign in with your work email to read every gated row on this table — description, lead time, origin, export control and the full technical data.

Signing in creates a free Parter account. We use your name and email to contact you about Parter — see our Privacy Policy.

Find & compare verified second sources
Spot risk early with real-time part monitoring
Stay compliant and production-ready

Related parts

Part	Market availability	Lifecycle	Alternatives available
L3845D1013TRSTMicroelectronics	Discontinued	Obsolete	3Alternatives availableSee Alternatives
L9362013TRSTMicroelectronics	In stock	Active	3Alternatives availableSee Alternatives
LP2981A-33DBVTTexas Instruments	In stock	Obsolete	4Alternatives availableSee Alternatives
L9906TRSTMicroelectronics	Discontinued	Obsolete	2Alternatives availableSee Alternatives
LD1117S33TRSTMicroelectronics	In stock	Active	5Alternatives availableSee Alternatives
TL431ACDSTMicroelectronics	In stock	Obsolete	8Alternatives availableSee Alternatives

You searched one part. Parter watches your whole BOM.

All your BOM, at once
Parter maps every line to live stock, lead time, lifecycle and compliance data across the entire market — not part by part.
Hear about problems before they hit production
Allocation, EOL and last-time-buy notices surface the moment they appear, not when your buyer's PO bounces.
Qualified replacements in minutes, not days
Every at-risk line gets form-fit-function matches like the ones above — deltas flagged, evidence attached. Review, push to your BOM, and Parter starts watching the new part too.