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
Packaging

Microchip Technology 8-bit Microcontrollers - MCU 32kB Flash 1280B RAM 2.7V-5.5V
Datasheet
4In Stock
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 CAN/C51 Boot CAN
Datasheet
500Expected 31/08/2026
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 64kB Flash 2048B RAM 2.7V-5.5V
Datasheet
1.413Expected 04/09/2026
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 C51AC3 64K FLASHADC EEP 5V
Datasheet
Lead-Time 8 Weeks
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 LPC/CAN/C51 BootUA IND
Datasheet
Non-Stocked Lead-Time 10 Weeks
Min.: 250
Mult.: 250

8051 16 kB 512 B VQFP-32 40 MHz 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 CAN BOOT
Datasheet
Non-Stocked Lead-Time 9 Weeks
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 C51ED2 64K FLASH 3-5.5V Ind
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 1.500
Mult.: 1.500
: 1.500

8051 64 kB 2 kB LQFP-64 60 MHz No ADC 32 I/O 2.7 V 5.5 V SMD/SMT 8 bit Reel
Microchip Technology 8-bit Microcontrollers - MCU 64kB Flash 2048B RAM 2.7V-5.5V
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 160
Mult.: 160

8051 64 kB 2 kB VQFP-64 60 MHz No ADC 50 I/O 2.7 V 5.5 V SMD/SMT 8 bit - 40 C + 85 C 89C Tray

Microchip Technology 8-bit Microcontrollers - MCU C51ED2 64K FLASH 3-5.5V Ind
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 500
Mult.: 500
: 500

8051 64 kB 2 kB PLCC-44 60 MHz No ADC 32 I/O 2.7 V 5.5 V SMD/SMT 8 bit Reel

Microchip Technology 8-bit Microcontrollers - MCU C51IC2 32K FLASH I2C 32KHz 3V
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 500
Mult.: 500
: 500

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 Reel

Microchip Technology 8-bit Microcontrollers - MCU C51IC2 32K FLASH I2C 32KHz 5V
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 500
Mult.: 500
: 500

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 Reel

Microchip Technology 8-bit Microcontrollers - MCU C51ID2 64K FLASH TWI 32KHz 5V
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 500
Mult.: 500
: 500

8051 64 kB 2 kB PLCC-44 60 MHz No ADC 32 I/O 2.7 V 5.5 V SMD/SMT 8 bit Reel

Microchip Technology 8-bit Microcontrollers - MCU C51RB2 FLASH 3V 16k Ind
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 1
Mult.: 1
: 500

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 Reel, Cut Tape

Microchip Technology 8-bit Microcontrollers - MCU C51RB2 FLASH 5V 16k ind
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 500
Mult.: 500
: 500

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 Reel

Microchip Technology 8-bit Microcontrollers - MCU C51RC2 32K FLASH 3V Ind
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 500
Mult.: 500
: 500

8051 32 kB 1.25 kB PLCC-44 60 MHz No ADC 32 I/O 2.7 V 5.5 V SMD/SMT 8 bit Reel

Microchip Technology 8-bit Microcontrollers - MCU C51RC2 32K FLASH 5V Com
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 500
Mult.: 500
: 500

8051 32 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 Reel
Microchip Technology 8-bit Microcontrollers - MCU CAN TQFP44 T&R Ind. Boot UART GREEN
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 2.000
Mult.: 2.000
: 2.000

TQFP-44 Reel
Microchip Technology 8-bit Microcontrollers - MCU C51IC2 32Kf I2C 32KHz TQFP44 I. 3V GREEN
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 2.000
Mult.: 2.000
: 2.000

TQFP-44 Reel
Microchip Technology 8-bit Microcontrollers - MCU C51IC2 32Kf I2C 32KHz TQFP44 I. 5V GREEN
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 2.000
Mult.: 2.000
: 2.000

TQFP-44 Reel
Microchip Technology 8-bit Microcontrollers - MCU C51ID2 64kF 32KHz TQFP44 3-5.5V I. GREEN
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 2.000
Mult.: 2.000
: 2.000

TQFP-44 Reel
Microchip Technology 8-bit Microcontrollers - MCU 8-bit 16K Flash C51RB2
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 100
Mult.: 10

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 Tube
Microchip Technology 8-bit Microcontrollers - MCU C51RC2 FLASH 32k TQFP44 I. 5V GREEN
Datasheet
Non-Stocked Lead-Time 9 Weeks
Min.: 2.000
Mult.: 2.000
: 2.000

TQFP-44 Reel
Microchip Technology 8-bit Microcontrollers - MCU 8-bit 16K Flash C5130A USB
Datasheet
Non-Stocked Lead-Time 20 Weeks
Min.: 1.500
Mult.: 1.500
: 1.500

8051 VQFP-64 No ADC 2.7 V 5.5 V SMD/SMT 8 bit Reel