AT89C2051-24PU Microcontroller IC DIP 20-pin

AT89C2051-24PU Microcontroller IC DIP 20-pin

The AT89C2051-24PU is a compact, low-voltage, high-performance CMOS 8-bit microcontroller from Atmel. It is built around a fully compatible MCS-51 core, ensuring support for the widely adopted industry-standard instruction set. This device is manufactured using Atmel’s high-density nonvolatile memory technology, integrating a versatile 8-bit CPU with Flash memory on a single chip. Its primary design goal is to provide a highly-flexible and cost-effective solution for space-constrained and power-sensitive embedded control applications, offering a significant feature set in a minimal 20-pin package.

At the heart of this microcontroller is 2KB of reprogrammable Flash program memory, which allows for easy code updates and prototyping. It is complemented by 128 bytes of on-chip RAM for data storage and operation. The device provides 15 programmable I/O lines, with the output buffers capable of sinking 20 mA, enabling them to drive LEDs directly without requiring external drivers. This makes it particularly useful for applications where components need to be driven directly from the microcontroller pins.

Beyond its standard features, the AT89C2051 includes an on-chip precision analog comparator, adding a valuable mixed-signal capability for sensor interfacing and threshold detection. It supports a fully static operation from 0 Hz to 24 MHz, allowing the clock to be stopped for ultra-low power consumption. The chip also features two software-selectable power-saving modes, Idle and Power-down, which are essential for battery-powered devices, helping to minimize energy usage during periods of inactivity.

Features:

• Compatible with MCS-51 Products.
• 2K Bytes of Reprogrammable Flash Memory.
• Endurance: 10,000 Write/Erase Cycles.
• 2.7V to 6V Operating Range.
• Fully Static Operation: 0 Hz to 24 MHz.
• 128 x 8-bit Internal RAM.
• 15 Programmable I/O Lines.
• Two 16-bit Timer/Counters.
• Six Interrupt Sources.
• Programmable Serial UART Channel.
• Direct LED Drive Outputs.
• On-chip Analog Comparator.
• Low-power Idle and Power-down Modes.

Specifications:

Pinout Diagram:

Footprint Diagram:

Applications:

• Sensor Interface and Control Systems.
• Automotive Control Modules.
• Power Tool Controllers.
• Consumer Electronics.
• LED Display Drivers.

Package Contents:

• 1x AT89C2051-24PU Microcontroller IC DIP 20-pin

Datasheet