UC3843DAlternatives & Equivalent Parts

About UC3843D

UC3843D is a Integrated Circuit component manufactured by Texas Instruments. It comes in a Small Outline Packages package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.

Specification Comparison

ParameterUC3843DSourceUC3843DG4UC3843NUC3842DUC3845DUC3842D8UC3844AD
ManufacturerTexas InstrumentsTexas InstrumentsTexas InstrumentsTexas InstrumentsTexas InstrumentsTexas InstrumentsTexas Instruments
Package TypeSmall Outline PackagesSmall Outline PackagesDual-In-Line PackagesSmall Outline PackagesSmall Outline PackagesSmall Outline Packages
Pin Count1414814814
Temperature Range~ 70.0°C~ 70.0°C~ 70.0°C~ 70.0°C~ 70.0°C~ 70.0°C
Price$0.3650$0.6585$0.4260$0.5917$0.5917$0.6000$0.5274
Electrical Parameters
Pbfree CodeYesYesYesYesYesYes
YTEOL151515151515
Analog IC - Other TypeSWITCHING CONTROLLERSWITCHING CONTROLLERSWITCHING CONTROLLERSWITCHING CONTROLLERSWITCHING CONTROLLERSWITCHING CONTROLLER
Control ModeCURRENT-MODECURRENT-MODECURRENT-MODECURRENT-MODECURRENT-MODECURRENT-MODE
Control TechniquePULSE WIDTH MODULATIONPULSE WIDTH MODULATIONPULSE WIDTH MODULATIONPULSE WIDTH MODULATIONPULSE WIDTH MODULATIONPULSE WIDTH MODULATION
Input Voltage-Max28 V28 V28 V28 V28 V28 V
Input Voltage-Min8.2 V8.2 V8.2 V8.2 V11.5 V11.5 V
Input Voltage-Nom15 V15 V15 V15 V15 V15 V
JESD-30 CodeR-PDSO-G14R-PDSO-G14R-PDIP-T8R-PDSO-G14R-PDSO-G8R-PDSO-G14
JESD-609 Codee4e4e4e4e4e4
Number of Functions111111
Output Current-Max1 A1 A1 A1 A1 A1 A
Output Voltage-Nom2.5 V2.5 V5 V2.5 V5 V5 V
Package Body MaterialPLASTIC/EPOXYPLASTIC/EPOXYPLASTIC/EPOXYPLASTIC/EPOXYPLASTIC/EPOXYPLASTIC/EPOXY
Package Equivalence CodeSOP14,.25SOP14,.25DIP8,.3SOP14,.25SOP8,.25SOP14,.25
Package ShapeRECTANGULARRECTANGULARRECTANGULARRECTANGULARRECTANGULARRECTANGULAR
Package StyleSMALL OUTLINESMALL OUTLINEIN-LINESMALL OUTLINESMALL OUTLINESMALL OUTLINE
Peak Reflow Temperature (Cel)260260260260260
Qualification StatusNot QualifiedNot QualifiedNot QualifiedNot QualifiedNot QualifiedNot Qualified
Supply Current-Max (Isup)25 mA25 mA25 mA25 mA25 mA25 mA
Supply Voltage-Max (Vsup)28 V28 V28 V28 V28 V28 V
Supply Voltage-Min (Vsup)8.4 V8.4 V8.4 V8.4 V16 V16 V
Surface MountYESYESNOYESYESYES
Switcher ConfigurationBUCK-BOOSTBUCK-BOOSTBUCK-BOOSTBUCK-BOOSTBUCK-BOOSTBUCK-BOOST
Switching Frequency-Max500 kHz500 kHz500 kHz500 kHz500 kHz500 kHz
TechnologyBIPOLARBIPOLARBICMOSBIPOLARBICMOSBIPOLAR
Temperature GradeCOMMERCIALCOMMERCIALCOMMERCIALCOMMERCIALCOMMERCIALCOMMERCIAL
Terminal FinishNickel/Palladium/Gold (Ni/Pd/Au)Nickel/Palladium/Gold (Ni/Pd/Au)Nickel/Palladium/Gold (Ni/Pd/Au)Nickel/Palladium/Gold (Ni/Pd/Au)Nickel/Palladium/Gold (Ni/Pd/Au)Nickel/Palladium/Gold (Ni/Pd/Au)
Terminal FormGULL WINGGULL WINGTHROUGH-HOLEGULL WINGGULL WINGGULL WING
Terminal Pitch1.27 mm1.27 mm2.54 mm1.27 mm1.27 mm1.27 mm
Terminal PositionDUALDUALDUALDUALDUALDUAL
Time@Peak Reflow Temperature-Max (s)3030303030
## UC3843D Alternates Showing resultsImage
## UC3843N Alternates Showing resultsImage
## UC3845D Alternates Showing resultsImage
## UC3842D8 Alternates Showing resultsImage
Output Voltage-Max5.1 V
Output Voltage-Min4.9 V
Supply Voltage-Nom (Vsup)11 V

Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.

Quick Links

UC3843DG4by Texas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14

UC3843N

suggested

UC3842Dby Texas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14

UC3845Dby Texas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14

UC3842D8by Texas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BICMOS, PDSO8

UC3844ADby Texas Instruments

Switching Controller, Current-mode, 1A, 500kHz Switching Freq-Max, BIPolar, PDSO14

Why Look for Alternatives?

Finding alternatives for UC3843D is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.

When evaluating UC3843D replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.

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Request Alternatives for UC3843D

FAQ

What is equivalent to UC3843D?

Known equivalents for UC3843D include UC3843DG4, UC3843N, UC3842D. Contact FindMyChip for a full compatibility analysis for your specific application.

Can I use a different manufacturer's part instead of UC3843D?

In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.

How do I verify UC3843D alternatives?

Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.