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AT89C51-33JI

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AT89C51-33JI

IC MCU 8BIT 4KB FLASH 44PLCC

Manufacturer: Microchip Technology

Categories: Microcontrollers

Quality Control: Learn More

The Microchip Technology AT89C51-33JI is an 8-bit microcontroller based on the 80C51 core architecture. This FLASH memory device operates at 33MHz and features 4KB of program memory (4K x 8) and 128 bytes of RAM. Connectivity includes a UART/USART interface, and it offers 32 programmable I/O pins. The device utilizes an internal oscillator and is supplied in a 44-PLCC (J-Lead) surface-mount package. Operating voltage is specified from 4V to 6V, with an operating temperature range of -40°C to 85°C. This component is commonly utilized in industrial automation, consumer electronics, and automotive applications.

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
Speed33MHz
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 Processor80C51
Data Converters-
Core Size8-Bit
Voltage - Supply (Vcc/Vdd)4V ~ 6V
ConnectivityUART/USART
Peripherals-
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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