C8051F9xx MCUs

Silicon Laboratories C8051F9xx Low-Voltage, Low-Power MCUs are capable of operating down to 0.9V. With an integrated DC-DC converter, the devices operate over a 0.9V to 1.8V and 1.8V to 3.6V range, supporting both single- and dual-battery operation. The integrated DC-DC converter can also supply current to external devices, creating an entire solution capable of operating off a single battery. Silicon Laboratories C8051F9xx MCUs come with 64kB of flash and 4kB of RAM in a 4x4mm package.

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Description Datasheet Availability Pricing (SGD) 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
Packaging

Silicon Labs 8-bit Microcontrollers - MCU 64kB/4kB RAM, 10b ADC, DC-DC, 0.9V, LQFP32
Datasheet
5,190In Stock
Min.: 1
Mult.: 1

8051 64 kB 4.25 kB LQFP-32 25 MHz 10 bit 24 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C Tray

Silicon Labs 8-bit Microcontrollers - MCU 32kB/4kB RAM, 10b ADC, DC-DC, 0.9V, QFN32
Datasheet
6,218In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

8051 32 kB 4.25 kB QFN-32 25 MHz 10 bit 24 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Reel, Cut Tape, MouseReel

Silicon Labs 8-bit Microcontrollers - MCU 64kB/4kB RAM, 10b ADC, DC-DC, 0.9V, LQFP32
Datasheet
3,275In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 500

8051 64 kB 4.25 kB LQFP-32 25 MHz 10 bit 24 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Reel, Cut Tape, MouseReel

Silicon Labs 8-bit Microcontrollers - MCU 64kB/4kB RAM, 10b ADC, DC-DC, 0.9V, QFN32
Datasheet
1,500In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

8051 64 kB 4.25 kB QFN-32 25 MHz 10 bit 24 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Reel, Cut Tape, MouseReel
Silicon Labs 8-bit Microcontrollers - MCU 64kB/4kB RAM, 10b ADC, DC-DC, 0.9V, QFN32
Datasheet
8,785In Stock
Min.: 1
Mult.: 1

8051 64 kB 4.25 kB QFN-32 25 MHz 10 bit 24 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C Tube
Silicon Labs 8-bit Microcontrollers - MCU 32kB/4kB RAM, 10bADC, DC-DC, 0.9V, QFN24
Datasheet
1,032In Stock
Min.: 1
Mult.: 1

8051 32 kB 4.25 kB QFN-24 25 MHz 10 bit 16 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Tube

Silicon Labs 8-bit Microcontrollers - MCU 32kB/4kB RAM, 10bADC, DC-DC, 0.9V, QFN24
Datasheet
1,496In Stock
Min.: 1
Mult.: 1
Reel: 1,500

8051 32 kB 4.25 kB QFN-24 25 MHz 10 bit 16 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 64KB/4kB RAM, 10b ADC, DC-DC, 0.9V, QFN24
Datasheet
2,631In Stock
Min.: 1
Mult.: 1

8051 64 kB 4.25 kB QFN-24 25 MHz 10 bit 16 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C Tube
Silicon Labs 8-bit Microcontrollers - MCU 64KB/4kB RAM, 10b ADC, DC-DC, 0.9V, QFN24
Datasheet
899In Stock
3,000Expected 3/4/2026
MouseReel Available
Min.: 1
Mult.: 1
Reel: 1,500

8051 64 kB 4.25 kB 25 MHz 10 bit 16 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Reel, Cut Tape, MouseReel

Silicon Labs 8-bit Microcontrollers - MCU 32kB/4kB RAM, 10b ADC, DC-DC, 0.9V, LQFP32
Datasheet
294In Stock
Min.: 1
Mult.: 1

8051 32 kB 4.25 kB LQFP-32 25 MHz 10 bit 24 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C Tray

Silicon Labs 8-bit Microcontrollers - MCU 32kB/4kB RAM, 10b ADC, DC-DC, 0.9V, LQFP32
Datasheet
332In Stock
MouseReel Available
Min.: 1
Mult.: 1
Reel: 500

8051 32 kB 4.25 kB LQFP-32 25 MHz 10 bit 24 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Reel, Cut Tape, MouseReel

Silicon Labs 8-bit Microcontrollers - MCU 32kB/4kB RAM, 10b ADC, DC-DC, 0.9V, QFN32
Datasheet
63In Stock
Min.: 1
Mult.: 1

8051 32 kB 4.25 kB QFN-32 25 MHz 10 bit 24 I/O 900 mV 3.6 V SMD/SMT 8 bit - 40 C + 85 C Tube