AT89C2051-24PU
It is a versatile microcontroller unit that can be used in various applications requiring embedded computing capabilitiesAT89C2051-24PU
It is a versatile microcontroller unit that can be used in various applications requiring embedded computing capabilities
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Manufacturer Part # : AT89C2051-24PU
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Package/Case: PDIP-20
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Brand: Microchip Technology
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Product Categories : Microcontrollers
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Series : AT89C2051
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AT89C2051-24PU DataSheet

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Interested Parts
AT89C2051-24PU Description
The AT89C2051-24PU is an 8-bit microcontroller from Microchip Technology, designed for compact and powerful embedded systems applications. This device features 2KB of Flash memory, 15 programmable I/O lines, and a clock frequency of 24MHz, making it suitable for various industrial control, automotive, and consumer electronics applications.
Pin Details
The AT89C2051-24PU is an 8-pin PDIP package microcontroller with the following pin configuration:
- Pin 1 (VCC): Positive Power Supply
- Pin 2 (GND): Ground
- Pin 3 (A0): Address Bit 0
- Pin 4 (A1): Address Bit 1
- Pin 5 (A2): Address Bit 2
- Pin 6 (A3): Address Bit 3
- Pin 7 (A4): Address Bit 4
- Pin 8 (XIN): Clock Input
Features
- High-performance 8-bit microcontroller: The AT89C2051-24PU features a clock frequency of 24MHz, making it suitable for various industrial control, automotive, and consumer electronics applications.
- 2KB Flash memory: This device has 2KB of Flash memory, allowing you to store your program code and data.
- 15 programmable I/O lines: The AT89C2051-24PU has 15 programmable I/O lines, making it suitable for various industrial control, automotive, and consumer electronics applications.
Applications
The AT89C2051-24PU is well-suited for various embedded systems applications, including industrial control, automotive, and consumer electronics.
Where to Use:
- Industrial control systems
- Automotive systems
- Consumer electronics devices
Manufacturer
The AT89C2051-24PU is manufactured by Microchip Technology, a global leader in semiconductor technology.
Packages
The AT89C2051-24PU comes in an 8-pin PDIP package, making it suitable for surface-mount technology and through-hole mounting applications.
Equivalent Parts of AT89C2051-24PU
- AT89S2051: A comparable microcontroller from Microchip Technology with similar features and performance.
FAQ
Q: What is the clock frequency of the AT89C2051-24PU?
A: The clock frequency of the AT89C2051-24PU is 24MHz, making it suitable for various industrial control, automotive, and consumer electronics applications.
Q: How much Flash memory does the AT89C2051-24PU have?
A: The AT89C2051-24PU has 2KB of Flash memory, allowing you to store your program code and data.
Q: What is the number of programmable I/O lines on the AT89C2051-24PU?
A: The AT89C2051-24PU has 15 programmable I/O lines, making it suitable for various industrial control, automotive, and consumer electronics applications.

Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Program Memory Size (KB) | 2 | RAM (bytes) | 0 |
Data EEPROM (bytes) | 0 | Pin Count ! | 20 |
Operation Voltage Max.(V) | 6 | Operation Voltage Min.(V) | 2.7 |
Timers | 0 x 8-bit - 0 x 16-bit | Max ADC Resolution (bits) | 0 |
ADC Channels | 0 | Zero Cross Detect | No |
Number of Comparators | 0 | SPI | 0 -SPI |
I2C | 0 -I2C | Stand alone PWM | 0 |
Low Power | No | Numerically Controlled Oscillator (NCO) | 0 |
Data Signal Modulator (DSM) | 0 |
Datasheet PDF
Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.
FAQs
What is AT89C2051-24PU?
The AT89C2051-24PU is a high-performance 8-bit microcontroller manufactured by Atmel (now Microchip). It is commonly used in embedded applications, consumer electronics, and industrial control systems that require a compact and cost-effective microcontroller solution.
How Does AT89C2051-24PU Work?
The AT89C2051-24PU operates as a versatile microcontroller with 2KB of Flash memory, 128 bytes of RAM, and 15 input/output pins. It executes program instructions stored in its Flash memory, interacts with external devices through its I/O pins, and communicates with peripherals through serial communication interfaces.
How Many Pins does AT89C2051-24PU have and What are the Functions of the Pinout Configuration?
The AT89C2051-24PU comes in a 20-pin DIP (Dual Inline Package) configuration. The pinout includes:
- VCC: Supply voltage pin.
- GND: Ground pin.
- RST: Reset pin.
- Port 1 (P1.0-P1.7): Bidirectional I/O pins.
- Port 2 (P2.0-P2.7): Bidirectional I/O or address/data bus pins.
- Port 3 (P3.0-P3.7): Bidirectional I/O or special function pins.
- RXD: Serial receive pin for UART communication.
- TXD: Serial transmit pin for UART communication.
- XTAL1: Input to the internal oscillator circuit.
- XTAL2: Output from the internal oscillator circuit.
What are the Pros and Cons of AT89C2051-24PU?
Pros:
- Compact Size: Small form factor suitable for space-constrained designs.
- Cost-Effective: Offers a budget-friendly solution for various applications.
- Versatile I/O: Multiple I/O pins for interfacing with external components.
- UART Communication: Supports serial communication for data exchange.
- Flash Memory: On-chip Flash memory for program storage.
Cons:
- Low Computational Power: Limited processing capabilities compared to higher-end microcontrollers.
- Limited Memory: Small RAM and Flash memory sizes may restrict complex program execution.
- Limited Peripherals: Fewer built-in peripherals compared to advanced microcontrollers.
Are There Any Equivalents/Alternatives to AT89C2051-24PU for Recommendation?
- The PIC12F675 from Microchip is a viable alternative with similar features.
- Alternatives to the AT89C2051-24PU include the STM8S003F3P6 from STMicroelectronics and the P89V51RD2 from NXP.
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Price details
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