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AT89C55WD-24JI

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AT89C55WD-24JI

IC MCU 8BIT 20KB FLASH 44PLCC

Manufacturer: Microchip Technology

Categories: Microcontrollers

Quality Control: Learn More

Microchip Technology AT89C55WD-24JI is an 8-bit 8051 microcontroller featuring 20KB of FLASH program memory and 256 bytes of RAM. This device operates at a maximum frequency of 24MHz and includes a 256 x 8 RAM configuration. It offers 32 programmable I/O pins and supports serial communication via a UART/USART interface. The microcontroller is equipped with a Watchdog Timer (WDT) peripheral. The AT89C55WD-24JI is housed in a 44-lead PLCC package with a surface-mount design, suitable for operation across an industrial temperature range of -40°C to 85°C. This component finds application in industrial automation, consumer electronics, and automotive systems requiring robust 8051 core performance.

Additional Information

Series: 89CRoHS Status: RoHS non-compliantManufacturer Lead Time: No lead time information availableProduct Status: ObsoletePackaging: Tube
Technical Details:
PackagingTube
Package / Case44-LCC (J-Lead)
Mounting TypeSurface Mount
Speed24MHz
Program Memory Size20KB (20K x 8)
RAM Size256 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)4.5V ~ 5.5V
ConnectivityUART/USART
PeripheralsWDT
Supplier Device Package44-PLCC (16.6x16.6)
Number of I/O32
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.

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