EFM8BB51 & EFM8BB52 Busy Bee 8-bit MCUs

Silicon Labs  EFM8BB51 and EFM8BB52 Busy Bee MCUs are multi-purpose microcontrollers with a comprehensive  feature set in compact packages. These devices offer high value by integrating advanced analogue and communication peripherals  into a small footprint, making them ideal for space-constrained applications.  With an efficient 8051 core, 5V capable I/O, precision analogue and enhanced pulse-width modulation, the EFM8BB51 and EFM8BB52 MCUs are optimal for embedded 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
Packaging
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU
Datasheet
539In Stock
Min.: 1
Mult.: 1

16 kB 1.28 kB QFN-32 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU
Datasheet
2In Stock
Min.: 1
Mult.: 1

16 kB 1.28 kB TSSOP-28 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
200Expected 27/02/2026
Min.: 1
Mult.: 1

16 kB 1.28 kB QFN-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
Reel: 2.500

16 kB 1.28 kB QFN-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 29 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
Reel: 2.500

16 kB 1.28 kB QFN-32 29 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 25 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-28 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1

16 kB 1.28 kB QFN-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Lead-Time 16 Weeks
Min.: 1
Mult.: 1
Reel: 2.500

16 kB 1.28 kB QFN-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 16 kB flash 1.28 kB RAM 25 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1

16 kB 1.28 kB TSSOP-28 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
Reel: 2.500

16 kB 1.28 kB QFN-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 29 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1
Reel: 2.500

16 kB 1.28 kB QFN-32 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel, Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-28 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 8 kB flash 1.28 kB RAM 16 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 1
Mult.: 1

16 kB 1.28 kB QFN-20 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Cut Tape
Silicon Labs 8-bit Microcontrollers - MCU 5 Volt 8051 50 Mhz 32 kB flash 2.304 kB RAM 25 GPIO BB5 8-bit MCU
Datasheet
Non-Stocked Lead-Time 16 Weeks
Min.: 2.500
Mult.: 2.500
Reel: 2.500

16 kB 1.28 kB TSSOP-28 16 I/O 1.8 V 5.5 V SMD/SMT - 40 C + 85 C Reel
Silicon Labs EFM8BB52F32G-A-QFN32
Silicon Labs 8-bit Microcontrollers - MCU
Datasheet
Non-Stocked
Min.: 1
Mult.: 1
8051 32 kB 2.25 kB QFN-32 50 MHz 12 bit 29 I/O 1.8 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C