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AT89LP428-20JU

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AT89LP428-20JU

IC MCU 8BIT 4KB FLASH 32PLCC

Manufacturer: Microchip Technology

Categories: Microcontrollers

Quality Control: Learn More

The Microchip Technology AT89LP428-20JU is an 8-bit 8051 microcontroller featuring 4KB of FLASH program memory. This device operates at up to 20MHz and includes 768 bytes of RAM and 512 bytes of EEPROM. Connectivity options include SPI and UART/USART interfaces. Peripherals such as Brown-out Detect/Reset, POR, PWM, and WDT are integrated. The AT89LP428-20JU is supplied in a 32-PLCC package suitable for surface mounting and operates within an ambient temperature range of -40°C to 85°C. Its voltage supply range is 2.4V to 5.5V. This component is utilized in industrial and consumer electronics applications.

Additional Information

Series: 89LPRoHS Status: ROHS3 CompliantManufacturer Lead Time: No lead time information availableProduct Status: ObsoletePackaging: TubeDatasheet:
Technical Details:
PackagingTube
Package / Case32-LCC (J-Lead)
Mounting TypeSurface Mount
Speed20MHz
Program Memory Size4KB (4K x 8)
RAM Size768 x 8
Operating Temperature-40°C ~ 85°C (TA)
Oscillator TypeInternal
Program Memory TypeFLASH
EEPROM Size512 x 8
Core Processor8051
Data Converters-
Core Size8-Bit
Voltage - Supply (Vcc/Vdd)2.4V ~ 5.5V
ConnectivitySPI, UART/USART
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
Supplier Device Package32-PLCC (13.97x11.43)
Number of I/O30
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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