AT89C51 8-Bit MCUs

Microchip Technology AT89C51 8-Bit MCUs offer low-power and high-performance with up to 32KB of flash programmable ROM and 512 bytes of RAM. The MCUs use Microchip high-density nonvolatile memory technology. The devices are compatible with the industry-standard 80C51 and 80C52 instruction set and pinout. On-chip flash allows the program memory to be user programmed by a conventional nonvolatile memory programmer. This versatile 8-bit CPU with flash provides a flexible and cost-effective solution for many embedded control applications.

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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
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Microchip Technology 8-bit Microcontrollers - MCU C51AC3 64K FLASHADC EEP 5V
Datasheet
267In Stock
€9.22
€8.46
€7.66
Min.: 1
Mult.: 1
8051 64 kB 2 kB PLCC-44 60 MHz 10 bit 36 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube
Microchip Technology 8-bit Microcontrollers - MCU CAN/C51 Boot CAN
Datasheet
495In Stock
€7.03
€6.45
€5.86
Min.: 1
Mult.: 1
8051 16 kB 512 B VQFP-32 40 MHz 10 bit 20 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tray
Microchip Technology 8-bit Microcontrollers - MCU CAN C51 64K FLASH UAR BOOT
Datasheet
405In Stock
€9.21
€8.45
€7.64
Min.: 1
Mult.: 1
8051 64 kB 2 kB VQFP-64 60 MHz 10 bit 36 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tray

Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2048B RAM 2.7V-5.5V
Datasheet
930In Stock
€8.87
€8.13
€7.36
Min.: 1
Mult.: 1
8051 64 kB 2 kB PLCC-44 60 MHz No ADC 34 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube
Microchip Technology 8-bit Microcontrollers - MCU C51ED2 64K FLASH 3-5.5V Ind
Datasheet
727In Stock
€9.43
€8.63
€7.83
Min.: 1
Mult.: 1
8051 64 kB 2 kB PLCC-68 60 MHz No ADC 48 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU C51IC2 32K FLASH I2C 32KHz 5V
Datasheet
377In Stock
€7.58
€7.39
Min.: 1
Mult.: 1
8051 32 kB 1.25 kB PLCC-44 60 MHz No ADC 34 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU C51RB2 16K FLASH 5V COM
Datasheet
584In Stock
2,646Expected 06/11/2026
€6.46
€5.93
€5.38
Min.: 1
Mult.: 1
8051 16 kB 1.25 kB PLCC-44 60 MHz No ADC 32 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU 32K FLASH 4.0 TO 5.5V - 24MHZ 5V
Datasheet
699In Stock
€4.01
€3.69
Min.: 1
Mult.: 1
8051 32 kB 512 B PLCC-44 24 MHz No ADC 32 I/O 4 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube
Microchip Technology 8-bit Microcontrollers - MCU 32K FLASH 4.0 TO 5.5V
Datasheet
1,004In Stock
€4.45
€4.09
€4.08
Min.: 1
Mult.: 1
8051 32 kB 512 B PDIP-40 24 MHz No ADC 32 I/O 4 V 5.5 V Through Hole 8 bit - 40 C + 85 C 89C Tube
Microchip Technology 8-bit Microcontrollers - MCU 32kB Flash 1280B RAM 2.7V-5.5V
Datasheet
198In Stock
360Expected 21/12/2026
€8.10
€7.44
€6.73
Min.: 1
Mult.: 1
8051 32 kB 1.25 kB PDIP-40 60 MHz No ADC 32 I/O 2.7 V 5.5 V Through Hole 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU C51RD2 64K FLASH 3-5.5V
Datasheet
426In Stock
Cut Tape
€7.93
€7.71
Reel
€6.59
Min.: 1
Mult.: 1
: 500
8051 64 kB 2 kB PLCC-44 60 MHz 34 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C Reel, Cut Tape
Microchip Technology 8-bit Microcontrollers - MCU C51AC3 64kF ADC EEP TQFP44 ind 5V GREEN
Datasheet
296In Stock
€8.80
€8.06
€7.31
Min.: 1
Mult.: 1
8051 64 kB 128 B TQFP-64 60 MHz 10 bit 36 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU C51ED2 64kF TQFP44 3-5.5V Ind GREEN
Datasheet
1,073In Stock
€8.44
€7.74
€7.01
Min.: 1
Mult.: 1
8051 64 kB 2 kB TQFP-44 60 MHz 34 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU C51RB2 FLASH 16k TQFP44 COM 5V GREEN
Datasheet
330In Stock
€6.16
€5.64
€5.11
Min.: 1
Mult.: 1
8051 16 kB 1.25 kB TQFP-44 60 MHz No ADC 32 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU C51RC2 FLASH 32k TQFP44 Com 5V GREEN
Datasheet
39In Stock
€7.04
€6.45
€5.84
Min.: 1
Mult.: 1
8051 32 kB 1.25 kB TQFP-44 60 MHz No ADC 32 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C Tray
Microchip Technology 8-bit Microcontrollers - MCU C51RD2 64kF TQFP44 3-5.5V Ind. GREEN
Datasheet
281In Stock
€7.55
€6.93
€6.28
Min.: 1
Mult.: 1
8051 64 kB 2 kB TQFP-44 60 MHz 34 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C Tray

Microchip Technology 8-bit Microcontrollers - MCU CAN-STICK Bootloader UART IND
Datasheet
937In Stock
999Expected 09/11/2026
€8.23
€7.53
€6.83
Min.: 1
Mult.: 1
8051 32 kB 1.2 kB PLCC-44 40 MHz 10 bit 34 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube
Microchip Technology 8-bit Microcontrollers - MCU CAN TQFP44 TRAY I. Bootloader CAN GREEN
Datasheet
762In Stock
€7.80
€7.15
€6.48
Min.: 1
Mult.: 1
8051 32 kB 1.25 kB TQFP-44 40 MHz 10 bit 34 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C Tray

Microchip Technology 8-bit Microcontrollers - MCU C51-CAN Bootloader CAN
Datasheet
28In Stock
€7.39
€6.78
€6.14
Min.: 1
Mult.: 1
8051 16 kB 512 B PLCC-28 40 MHz 10 bit 20 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU CTRL Bootloader CAN
Datasheet
43In Stock
€7.03
€6.45
€5.86
Min.: 1
Mult.: 1
8051 16 kB 512 B SOIC-28 40 MHz 10 bit 20 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU CTRL Bootloader UART
Datasheet
13In Stock
€7.39
€6.78
€6.14
Min.: 1
Mult.: 1
8051 16 kB 512 B PLCC-28 40 MHz 10 bit 20 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU CAN C51 64K FLASH CAN BOOT
Datasheet
70In Stock
81Expected 16/11/2026
€9.96
€9.15
€8.27
Min.: 1
Mult.: 1
8051 64 kB 2 kB PLCC-44 60 MHz 10 bit 36 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube
Microchip Technology 8-bit Microcontrollers - MCU C51RB2 FLASH 5V 16k ind
Datasheet
178In Stock
480Expected 25/11/2026
€6.45
€5.92
€5.36
Min.: 1
Mult.: 1
8051 16 kB 1.25 kB PDIP-40 60 MHz No ADC 32 I/O 2.7 V 5.5 V Through Hole 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU 32kB Flash 1280B RAM 2.7V-5.5V
Datasheet
4In Stock
€8.32
€7.62
€6.89
Min.: 1
Mult.: 1
8051 32 kB 1.25 kB PLCC-44 60 MHz No ADC 32 I/O 2.7 V 3.6 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube

Microchip Technology 8-bit Microcontrollers - MCU C51AC2 32K FLASHADC EEP 5V
Datasheet
101In Stock
€8.87
€8.13
€7.36
Min.: 1
Mult.: 1
8051 32 kB 1.25 kB PLCC-44 40 MHz 10 bit 34 I/O 3 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tube