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Microchip AT89C51-20PC

AT89C51-20PC is an 8-bit microcontroller featuring the 80C31 architecture with 4k of memory

ISO14001 ISO9001 DUNS

Brands: Microchip

Mfr.Part #: AT89C51-20PC

Datasheet: AT89C51-20PC Datasheet (PDF)

Package/Case: PDIP-40

Product Type: Microcontrollers

RoHS Status:

Stock Condition: 9,458 pcs, New Original

Warranty: 1 Year Ovaga Warranty - Find Out More

Quick Quote

Please submit RFQ for AT89C51-20PC or email to us: Email: [email protected], we will contact you within 12 hours.

AT89C51-20PC General Description

Whether you're working on industrial control systems, automotive electronics, or consumer electronics, the AT89C51-20PC is sure to meet your requirements. Its reprogrammable Flash memory makes it perfect for development and prototyping projects, allowing for easy iteration and testing. The AT89C51-20PC truly stands out as a reliable and feature-rich microcontroller suitable for a wide range of applications


  • The flash memory is programmable up to 4KB.
  • Easy integration with existing systems.


  • AT89C51-20PC a must-have for embedded systems
  • AT89C51-20PC top choice for industrial automation
  • AT89C51-20PC key component in robotics
Microchip Inventory


Parameter Value Parameter Value
Product Category 8-bit Microcontrollers - MCU RoHS N
Series 89C Mounting Style Through Hole
Package / Case PDIP-40 Core 8051
Program Memory Size 4 kB Data Bus Width 8 bit
ADC Resolution No ADC Maximum Clock Frequency 20 MHz
Number of I/Os 32 I/O Data RAM Size 128 B
Supply Voltage - Min 4 V Supply Voltage - Max 6 V
Minimum Operating Temperature 0 C Maximum Operating Temperature + 70 C
Brand Microchip Technology Data ROM Type Flash
Height 3.94 mm Length 52.6 mm
Number of Timers/Counters 2 Timer Product MCU
Product Type 8-bit Microcontrollers - MCU Program Memory Type Flash
Subcategory Microcontrollers - MCU Width 14.4 mm
Unit Weight 0.210004 oz


Shipping Type Ship Fee Lead Time
DHL DHL $20.00-$40.00 (0.50 KG) 2-5 days
Fedex Fedex $20.00-$40.00 (0.50 KG) 2-5 days
UPS UPS $20.00-$40.00 (0.50 KG) 2-5 days
TNT TNT $20.00-$40.00 (0.50 KG) 2-5 days
EMS EMS $20.00-$40.00 (0.50 KG) 2-5 days
REGISTERED AIR MAIL REGISTERED AIR MAIL $20.00-$40.00 (0.50 KG) 2-5 days

Processing Time:Shipping fee depend on different zone and country.


Terms of payment Hand Fee
Wire Transfer Wire Transfer charge US$30.00 banking fee.
Paypal Paypal charge 4.5% service fee.
Credit Card Credit Card charge 3.5% service fee.
Western Union Western Union charge US.00 banking fee.
Money Gram Money Gram charge US$0.00 banking fee.


1.The electronic components you purchase include 365 Days Warranty, We guarantee product quality.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


  • Product

    Step1 :Product

  • Vacuum packaging

    Step2 :Vacuum packaging

  • Anti-static bag

    Step3 :Anti-static bag

  • Individual packaging

    Step4 :Individual packaging

  • Packaging boxes

    Step5 :Packaging boxes

  • bar-code shipping tag

    Step6 :bar-code shipping tag

All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

Outside ESD packing’s lable will use ourcompany’s information: Part Mumber, Brand and Quantity.

We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

  • ESD
  • ESD

Part points

  • The AT89C51-20PC chip is a microcontroller manufactured by Atmel. It is commonly used in embedded systems and electronics projects due to its low power consumption, high processing speed, and extensive memory. The chip operates at a frequency of 20 MHz and supports a variety of interfaces and peripherals for communication and control.
  • Equivalent

    AT89C51 is equivalent to the following chips: AT89C51RD2, AT89C51RC2, AT89C51RC, AT89C51RE2, AT89C51ED2.
  • Features

    The AT89C51-20PC is a microcontroller with the following features: 8-bit CPU, 4KB flash memory, 128 bytes of on-chip RAM, 32 I/O lines, 2 16-bit timer/counters, 5 interrupt sources, full-duplex UART serial port, and a programmable parallel I/O port. It operates at a maximum frequency of 20 MHz and can be programmed using powerful MCS-51 instructions.
  • Pinout

    The AT89C51-20PC has a pin count of 40. It is a microcontroller with 4 ports (Port 0, 1, 2, and 3) for general-purpose input/output (GPIO) functions, multiple power supply pins, and various other pins for communication, timers, and programming.
  • Manufacturer

    The manufacturer of the AT89C51-20PC is Atmel Corporation. Atmel is a semiconductor company that specializes in designing and manufacturing microcontrollers, integrated circuits, and other electronic components.
  • Application Field

    The AT89C51-20PC is a microcontroller commonly used in various application areas such as industrial control systems, automotive electronics, medical equipment, consumer electronics, and communications systems. It provides a powerful yet flexible platform for developing and implementing digital control and embedded systems solutions.
  • Package

    The AT89C51-20PC chip is available in a DIP (Dual In-line Package) package type. The form factor is standard and the size is relatively small, with dimensions of approximately 14.48mm x 6.35mm x 3.30mm.

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