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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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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CHF) 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	Series	Packaging
	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB 8-bit MCU C8051F390-A-GM Silicon Labs 1: CHF 3.52 1’274In Stock NRND	Mfr. Part No. C8051F390-A-GM Mouser Part No 634-C8051F390-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	1’274In Stock	CHF 3.52 CHF 2.66 CHF 2.44 CHF 2.20 View CHF 2.09 CHF 2.08 CHF 1.95 CHF 1.90	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
	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU C8051F392-A-GM Silicon Labs 1: CHF 3.49 683In Stock 1’911Expected 11/2/2026 NRND	Mfr. Part No. C8051F392-A-GM Mouser Part No 634-C8051F392-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	683In Stock 1’911Expected 11/2/2026	CHF 3.49 CHF 2.63 CHF 2.41 CHF 2.18 View CHF 2.07 CHF 2.05 CHF 1.93 CHF 1.88	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
	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU C8051F391-A-GM Silicon Labs 1’911: CHF 1.81 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. C8051F391-A-GM Mouser Part No 634-C8051F391-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	Non-Stocked Lead-Time 12 Weeks	CHF 1.81	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
	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU C8051F394-A-GM Silicon Labs 1: CHF 3.18 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. C8051F394-A-GM Mouser Part No 634-C8051F394-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 16 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	Non-Stocked Lead-Time 12 Weeks	CHF 3.18 CHF 2.39 CHF 2.20 CHF 1.98 View CHF 1.88 CHF 1.87 CHF 1.75 CHF 1.71	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
	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU C8051F395-A-GM Silicon Labs 1’911: CHF 1.62 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. C8051F395-A-GM Mouser Part No 634-C8051F395-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	Non-Stocked Lead-Time 12 Weeks	CHF 1.62 CHF 1.58	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
	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU C8051F396-A-GM Silicon Labs 1’911: CHF 1.67 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. C8051F396-A-GM Mouser Part No 634-C8051F396-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	Non-Stocked Lead-Time 12 Weeks	CHF 1.67 CHF 1.64	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
	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU C8051F397-A-GM Silicon Labs 1’911: CHF 1.59 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. C8051F397-A-GM Mouser Part No 634-C8051F397-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	Non-Stocked Lead-Time 12 Weeks	CHF 1.59 CHF 1.56	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
	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU C8051F398-A-GM Silicon Labs 1’911: CHF 1.45 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. C8051F398-A-GM Mouser Part No 634-C8051F398-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 8 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	Non-Stocked Lead-Time 12 Weeks	CHF 1.45 CHF 1.41	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
	8-bit Microcontrollers - MCU 8051 50 MHz 4 kB LFO 8-bit MCU C8051F399-A-GM Silicon Labs 1’911: CHF 1.39 Non-Stocked Lead-Time 12 Weeks NRND	Mfr. Part No. C8051F399-A-GM Mouser Part No 634-C8051F399-A-GM NRND	Silicon Labs	8-bit Microcontrollers - MCU 8051 50 MHz 4 kB LFO 8-bit MCU Learn More about Silicon Labs siliconlabs c8051f37x	Datasheet	Non-Stocked Lead-Time 12 Weeks	CHF 1.39 CHF 1.37	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