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STMicroelectronics UC38 Series

7 variants · STMicroelectronics

About the STMicroelectronics STMicroelectronics UC38 Series series

The STMicroelectronics STMicroelectronics UC38 Series series groups 7 related part numbers, each listed with full specifications, a datasheet where available, and an RFQ option. Every variant in the range shares a common clock sync of No, control features of Frequency Control and frequency of Up to 500kHz. Variants differ by case, duty cycle and mounting type, so you can match the exact case your application requires using the selection guide below. The range mixes active and legacy part numbers, so you can source both current STMicroelectronics UC38 Series variants and discontinued ones from a single page.

Select a variant by

Case
8-DIP (0.300\", 7.62mm) · 8-SOIC (0.154\", 3.90mm Width)
Duty cycle
48% · 96%
Mounting type
Surface Mount · Through Hole
Operating temperature
-40°C ~ 150°C (TJ) · 0°C ~ 70°C (TA) · 0°C ~ 70°C (TJ) · 0°C~70°C(TA) · 0°C~70°C(TJ)
Package
Tape & Reel (TR) Cut Tape (CT) · Tape & Reel (TR); Cut Tape (CT) · Tube
Voltage - supply (Vcc (Vdd))
7.6V ~ 30V · 10V ~ 30V

Variant comparison

ParameterUC3843BD1013TRUC3843BNUC3844BNUC3845BD1013TRUC3842BD1UC3842BN
Case8-SOIC (0.154\", 3.90mm Width)8-DIP (0.300\", 7.62mm)8-DIP (0.300\", 7.62mm)8-SOIC (0.154\", 3.90mm Width)8-SOIC (0.154\", 3.90mm Width)8-DIP (0.300\", 7.62mm)
Duty cycle96%96%48%48%96%96%
Mounting typeSurface MountThrough HoleThrough HoleSurface MountSurface MountThrough Hole
Operating temperature0°C~70°C(TJ)0°C ~ 70°C (TJ)0°C ~ 70°C (TJ)-40°C ~ 150°C (TJ)0°C~70°C(TA)0°C~70°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)TubeTubeTape & Reel (TR) Cut Tape (CT)TubeTube
Voltage - supply (Vcc (Vdd))7.6V ~ 30V7.6V ~ 30V10V ~ 30V7.6V ~ 30V10V ~ 30V10V ~ 30V

Shared specifications

Clock sync
No
Control features
Frequency Control
Frequency
Up to 500kHz
Function
Step-Up, Step-Up/Step-Down
Interface
-
Number of outputs
1
Output configuration
Positive, Isolation Capable
Output phases
1
Output type
Transistor Driver
Synchronous rectifier
No
Topology
Boost, Flyback

Request a quote on any STMicroelectronics UC38 Series part number and we confirm price, availability and lead time per line — including end-of-life and allocation-constrained variants.

Frequently asked questions

How do the STMicroelectronics STMicroelectronics UC38 Series variants differ?
STMicroelectronics UC38 Series part numbers differ by case, duty cycle, mounting type and operating temperature. Use the selection guide above to pick by case.
How many STMicroelectronics STMicroelectronics UC38 Series part numbers are listed?
7 STMicroelectronics STMicroelectronics UC38 Series part numbers are listed, each with specifications and a datasheet where available.
How do I get pricing and lead time for STMicroelectronics STMicroelectronics UC38 Series?
Request a quote (RFQ) for any STMicroelectronics UC38 Series part number and we confirm price, availability and lead time per line — including end-of-life and hard-to-find variants.

All variants