EFM8™ Sleepy Bee 8-bit MCUs

Silicon Labs EFM8™ Sleepy Bee Family of MCUs are energy-friendly 8-bit microcontrollers with comprehensive features in small packages. They have low power consumption by combining innovative low energy techniques and short wake-up times from energy-saving modes. The Silicon Labs EFM8 are well suited for any battery-operated applications.

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Description Datasheet Availability Pricing (EUR) 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
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Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
Datasheet
1,531In Stock
Min.: 1
Mult.: 1

CIP-51 8051 8 kB 512 B 25 MHz 12 bit 17 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C EFM8SB AEC-Q100 Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
2,683In Stock
Min.: 1
Mult.: 1

CIP-51 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 EFM8SB Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
865In Stock
Min.: 1
Mult.: 1
: 1,500

CIP-51 8051 32 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 EFM8SB Reel, Cut Tape

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
1,500In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

CIP-51 8051 64 kB 4.25 kB 25 MHz 10 bit 16 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C EFM8SB Reel, Cut Tape, MouseReel
Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
Datasheet
1,221In Stock
Min.: 1
Mult.: 1
: 1,500

CIP-51 8051 8 kB 512 B QFN-20 25 MHz 12 bit 16 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C EFM8SB AEC-Q100 Reel, Cut Tape

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
1,111In Stock
Min.: 1
Mult.: 1

CIP-51 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 EFM8SB Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
81In Stock
Min.: 1
Mult.: 1
: 1,500

CIP-51 8051 32 kB 4.25 kB 25 MHz 10 bit 24 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C EFM8SB Reel, Cut Tape

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
787In Stock
Min.: 1
Mult.: 1

CIP-51 8051 32 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 EFM8SB Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
1,911Expected 13/11/2026
Min.: 1
Mult.: 1

CIP-51 8051 16 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 EFM8SB Tube

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 16 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1,500
Mult.: 1,500
: 1,500

CIP-51 8051 16 kB 4.25 kB 25 MHz 10 bit 16 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C EFM8SB Reel

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 32 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1
Mult.: 1

CIP-51 8051 32 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 EFM8SB Tube
Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
Datasheet
Non-Stocked Lead-Time 12 Weeks
Min.: 1,500
Mult.: 1,500
: 1,500

CIP-51 8051 8 kB 512 B QFN-24 25 MHz 12 bit 17 I/O 1.8 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C EFM8SB AEC-Q100 Reel

Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 64 kB flash 4 kB RAM 8-bit Sleepy Bee MCU
Datasheet
Non-Stocked Lead-Time 20 Weeks
Min.: 1
Mult.: 1
: 1,500

EFM8SB Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 8051 25 MHz 8 kB flash 0.5 kB RAM 8-bit Sleepy Bee MCU
Datasheet
Non-Stocked Lead-Time 20 Weeks
Min.: 1
Mult.: 1

EFM8SB AEC-Q100 Tube