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  • AT89C51RB2-SLSUM

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MCU 8Bit AT89 8051 CISC 16KB Flash 3.3V/5V 44Pin PLCC Stick

  • Package/Case :
  • PLCC-44
  • Product Categories :
  • 8-bit Microcontrollers - MCU
  • RoHs Status:
  • Green
  • In-stock:
  • 1928


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AT89C51RB2-SLSUM Product Details

High-performance, 8-bit microcontroller with 16KB flash. It retains all features of the 80C52 with 256 Bytes of internal RAM, a 9-source 4-level interrupt controller, and three timer/counters.
It features a programmable counter array, an XRAM of 1024 bytes, hardware watchdog timer, keyboard interface, SPI interface, versatile serial channel that facilitates multiprocessor communication (EUART), and a speed improvement mechanism (X2 mode).
Implementing an external brown-out is recommended to prevent any flash/EEPROM corruption during power-on or power-off.



• 80C52 Compatible
– 8051 Pin and Instruction Compatible
– Four 8-bit I/O Ports
– Three 16-bit Timer/Counters
– 256 Bytes Scratch Pad RAM
– 9 Interrupt Sources with 4 Priority Levels
– Dual Data Pointer
• Variable Length MOVX for Slow RAM/Peripherals
• ISP (In-system Programming) Using Standard V
CCPower Supply
• Boot ROM Contains Low Level Flash Programming Routines and a Default Serial
• High-speed Architecture
–48 MHz in Standard Mode and Internal Code Execution (40 MHz for external code
–24 MHz in X2 Mode and internal code execution (20 MHz for external code)
–16K/32K Bytes On-chip Flash Program/Data Memory
–Byte and Page (128 Bytes) Erase and Write
–100K Write Cycles
• On-chip 1024 Bytes Expanded RAM (XRAM)
–Software Selectable Size (0, 256, 512, 768, 1024 Bytes)
–256 Bytes Selected at Reset for TS87C51RB2/RC2 Compatibility
• Keyboard Interrupt Interface on Port P1
• SPI Interface (Master/Slave Mode)
• 8-bit Clock Prescaler
• Improved X2 Mode with Independent Selection for CPU and Each Peripheral
• Programmable Counter Array 5 Channels
– High-speed Output
– Compare/Capture
– Pulse Width Modulator
– Watchdog Timer Capabilities
• Asynchronous Port Reset
• Full Duplex Enhanced UART
• Dedicated Baud Rate Generator for UART
• Low EMI (Inhibit ALE)
• Hardware Watchdog Timer (One-time Enabled with Reset-out)
• Power Control Modes
–Idle Mode
–Power-down Mode
–Power-off Flag
• Power Supply:
–2.7 to 3.6 (3V Version)
–2.7 to 5.5V (5V Version)
• Temperature Ranges: Commercial (0 to +70°C) and Industrial (-40°C to +85°C)
• Packages: PDIL40, PLCC44, VQFP44

Technical Parameters

  • Core
  • 8051
  • Data Bus Width
  • 8 bit
  • Maximum Clock Frequency
  • 60 MHz
  • Program Memory Size
  • 16 KB
  • Data RAM Size
  • 1280 B
  • On Chip ADC
  • No
  • Operating Supply Voltage
  • 2.7 V to 5.5 V
  • Maximum Operating Temperature
  • + 85 C
  • Package / Case
  • PLCC
  • Mounting Style
  • Interface Type
  • Minimum Operating Temperature
  • - 40 C
  • Number of Programmable I/Os
  • 32
  • Number of Timers
  • 3
  • Packaging
  • Stick
  • Processor Series
  • AT89x
  • Program Memory Type
  • Flash
  • Factory Pack Quantity
  • 972
  • Supply Voltage Max
  • 5.5 V
  • Supply Voltage Min
  • 2.7 V

AT89C51RB2-SLSUM Documents

  • AT89C51RB2 Technical Documentation of Application Note
  • AT89C51RB2 Technical Documentation of Application Note

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Estimated Delivery Time: Feb 02 - Feb 07 days (choose Expedited at checkout).

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  • 7-30 days

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We provide high quality products, thoughtful service and after sale guarantee

  • We have rich products, can meet your various needs.

    We have rich products, can meet your various needs.

  • Minimum order quantity starts from 1pcs.

    Minimum order quantity starts from 1pcs.

  • Lowest international shipping fee starts from US$2.00.

    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.


  • Step1:Product

    Step1: Products

  • Step2:Vacuum packaging

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    Step3: Anti-Static Bag

  • Step4:Individual packaging

    Step4: Individual Packaging

  • Step5:Packaging boxes

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    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.

Jotrin ESD packing


1.We provide 90 days warranty.

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.


Q: How does Jotrin guarantee that AT89C51RB2-SLSUM is the original manufacturer or agent of MICROCHIP?
We have a professional business development department to strictly test and verify the qualifications of MICROCHIP original manufacturers and agents. All MICROCHIP suppliers must pass the qualification review before they can publish their AT89C51RB2-SLSUM devices; we pay more attention to the channels and quality of AT89C51RB2-SLSUM products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of AT89C51RB2-SLSUM chips? Including MICROCHIP original factory information, 8-bit Microcontrollers - MCU application, AT89C51RB2-SLSUM pictures?
You can use Jotrin's intelligent search engine, or filter by 8051 MCU Products category, or find it through Microchip Technology, Inc Information page.
Q: Are the MICROCHIP's AT89C51RB2-SLSUM price and stock displayed on the platform accurate?
The MICROCHIP's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for AT89C51RB2-SLSUM, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
Q: Can I place an order offline?
Yes. We accept offline orders.
We can provide order placement service. You only need to log in, click "My Orders" to enter the transaction management, and you will see the "Order Details" interface. After checking it, select all and click "Place Order". In addition, you can enjoy coupons or other selected gifts when placing orders online.
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Once your order has been processed for shipment, our sales will send you an e-mail advising you of the shipping status and tracking number.
Note: It may take up to 24 hours before carriers will display tracking information. In normal conditions, Express delivery needs 3-5 days, Registered Mail needs 25-60 days.
Q: What is the process for returns or replacement of AT89C51RB2-SLSUM?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the AT89C51RB2SLSUM we delivered, we will accept the replacement or return of the AT89C51RB2-SLSUM only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of AT89C51RB2-SLSUM.
(3)The AT89C51RB2-SLSUM is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
Q: How to contact us and get support, such as AT89C51RB2-SLSUM datasheet pdf, AT89C51RB2 pin diagram?
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Microchip Technology, Inc

Microchip Technology Inc. is a leading manufacturer of microcontroller and analog products, providing low-risk product development, lower total system cost, and faster time to market for thousands of diverse customer applications worldwide. Microchip offers outstanding technical support along with d...
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