ATMEL AT89C2051-24PU 8-bit Microcontroller, 2KB Flash, 20-Pin DIP

The ATMEL AT89C2051-24PU is a versatile, high-performance CMOS 8-bit microcontroller housed in a 20-pin Dual In-line Package (DIP). It is manufactured using Atmel's advanced high-density non-volatile memory technology and maintains full compatibility with the industry-standard MCS-51 instruction set, offering a highly flexible and cost-effective solution for embedded design. By integrating a powerful 8-bit CPU with onboard flash memory on a monolithic chip, it streamlines development and reduces system complexity.

This microcontroller is engineered for efficiency, featuring a fully static design that allows operation from 0Hz up to 24MHz. It includes sophisticated power management with two software-selectable modes: Idle and Power Down. The Power Down mode preserves RAM contents while halting the oscillator to minimise energy consumption until the next hardware reset, making it ideal for battery-powered applications.

Key Features & Specifications

• Core & Memory: 8-bit CPU with 2KB of in-system reprogrammable Flash memory for program storage and 128 x 8-bit of internal RAM.
• I/O & Peripherals: Provides 15 programmable I/O lines, two 16-bit timer/counters, a programmable serial UART channel, and six interrupt sources for handling complex real-time events.
• On-Chip Features: Includes an on-chip analogue comparator and oscillator with clock circuitry, reducing the need for external components.
• Operating Range: Designed for a wide operating voltage range from 4V to 6V (with a supply voltage capability from 2.7V to 6V) and can function reliably across an industrial temperature spectrum from -40°C to 85°C.
• Security & Packaging: Features a two-level program memory lock to secure code. The device is supplied in a through-hole mountable 20-pin DIP package, suitable for prototyping and robust embedded systems.

With its combination of integrated features, low-power modes