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AT89C4051-24SI

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AT89C4051-24SI

IC MCU 8BIT 4KB FLASH 20SOIC

Manufacturer: Microchip Technology

Categories: Microcontrollers

Quality Control: Learn More

The Microchip Technology AT89C4051-24SI is an 8-bit 8051 microcontroller featuring 4KB of FLASH program memory. This device operates at a maximum speed of 24MHz and includes 128 bytes of RAM. It offers 15 general-purpose I/O pins and supports UART/USART communication. Integrated peripherals include Brown-out Detect/Reset and Power-On Reset (POR). The AT89C4051-24SI is housed in a 20-SOIC package suitable for surface mounting and operates within an industrial temperature range of -40°C to 85°C. Its voltage supply range is 4V to 6V. This component is commonly utilized in industrial automation, consumer electronics, and automotive control applications.

Additional Information

Series: 89CRoHS Status: RoHS non-compliantManufacturer Lead Time: No lead time information availableProduct Status: ObsoletePackaging: Tube
Technical Details:
PackagingTube
Package / Case20-SOIC (0.295"", 7.50mm Width)
Mounting TypeSurface Mount
Speed24MHz
Program Memory Size4KB (4K x 8)
RAM Size128 x 8
Operating Temperature-40°C ~ 85°C (TA)
Oscillator TypeInternal
Program Memory TypeFLASH
EEPROM Size-
Core Processor8051
Data Converters-
Core Size8-Bit
Voltage - Supply (Vcc/Vdd)4V ~ 6V
ConnectivityUART/USART
PeripheralsBrown-out Detect/Reset, LED, POR
Supplier Device Package20-SOIC
Number of I/O15
ProgrammableNot Verified

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Microcontroller FAQs

A microcontroller is a compact integrated circuit that combines a processor, memory, and input/output peripherals for embedded control applications.

Microcontrollers execute programmed instructions to process sensor inputs and control outputs such as motors, displays, and communication interfaces.

Microcontrollers are commonly used in:

  • Automotive systems
  • Robotics
  • IoT devices
  • Industrial automation
  • Household appliances
  • Smart electronics

Microcontrollers integrate memory and peripherals on-chip for dedicated tasks, while microprocessors are designed for higher-performance computing systems requiring external components.

Frequently Asked Questions

As a full line supplier, we specialize in sourcing obsolete and hard to find electronic components for your projects.

After we receive your request submission, one of our account executives will reach out to your team to gather more information about your project requirements and ensure we tailor the order to your needs.

Once requirements such as date codes, quantities, target prices, testing requirements, and more are discussed, our purchasing team will secure stock through Microchip USA’s direct access to manufacturing partners’ excess inventory lists.

Our operations teams will handle logistics and fulfillment to ensure supply chain continuity, and our support team will provide clear communication throughout the process.

Our net terms for electronic component sourcing are flexible and vary by order. Our account executives will work with you to ensure our terms meet your company’s needs. We also offer scheduled shipments and inventory management solutions to ensure a steady supply of electronic components, maintain cash flow, and maximize warranty periods. We always offer a warranty on all tested parts. See our sales terms and conditions for more information.

We partner with industry-leading AS6171 & AS6081-certified third party testing labs to mitigate risk and support a wide array of end uses for your company’s requirements. Testing includes but isn’t limited to: Decapsulation & Internal Dye Verification. X-Ray Inspection & Analysis, External Visual Inspection, Surface Texture Analysis (SEM), and Electrical Pin Correlation.