C8051F37x/9x Small Form Factor MCUs

Silicon Labs C8051F37x/39x Small Form Factor MCUs are the next generation of Silicon Labs' best-selling C8051F33x mixed-signal MCUs. These MCUs range in flash size from 4-16 kB and are footprint and code compatible with the field-proven C8051F33x devices while offering faster speed/performance, more RAM, extra features and an extended temperature range. The C8051F39x/37x MCUs are an ideal fit for low-memory, low-pin-count applications. By combining a digital crossbar, analog peripherals, high-speed/performance, precision temperature sensor, and a precision oscillator all in a small form factor device, the C8051F39x/37x provides a best-in-class solution for a wide range of consumer, industrial, and communication applications.

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Description Datasheet Availability Pricing (IDR) Filter the results in the table by unit price based on your quantity.
Qty. RoHS ECAD Model Core
Program Memory Size
Data RAM Size
Package/Case
Maximum Clock Frequency
ADC Resolution
Number of I/Os
Supply Voltage - Min
Supply Voltage - Max
Mounting Style
Data Bus Width
Minimum Operating Temperature
Maximum Operating Temperature
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Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU
Datasheet
1.985In Stock
1.911Expected 02/11/2026
Min.: 1
Mult.: 1

8051 16 kB 1 kB QFN-20 50 MHz 10 bit 17 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F392 Tube
Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 16 kB 8-bit MCU
Datasheet
1.592Expected 26/08/2026
Min.: 1
Mult.: 1

8051 16 kB 1 kB QFN-24 50 MHz 10 bit 21 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F390 Tube
Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1.911
Mult.: 1.911

8051 16 kB 1 kB QFN-24 50 MHz 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F391 Tube
Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU
Datasheet
Lead-Time 12 Weeks
Min.: 1
Mult.: 1

8051 8 kB 1 kB QFN-24 50 MHz 10 bit 21 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F394 Tube
Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1.911
Mult.: 1.911

8051 8 kB 1 kB QFN-24 50 MHz 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F395 Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1.911
Mult.: 1.911

8051 8 kB 1 kB QFN-20 50 MHz 10 bit 17 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F396 Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1.911
Mult.: 1.911

8051 8 kB 1 kB QFN-20 50 MHz 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F397 Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1.911
Mult.: 1.911

8051 4 kB 1 kB QFN-20 50 MHz 10 bit 17 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F398 Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 50 MHz 4 kB LFO 8-bit MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1.911
Mult.: 1.911

8051 4 kB 1 kB QFN-20 50 MHz 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 105 C C8051F399 Tube