Atmel 8-Bit Microcontroller 89S51 DIP40

The Atmel 8-Bit Microcontroller 89S51 is a low-power, high-performance CMOS device that utilises high-density non-volatile memory technology. It is fully compatible with the industry-standard 80C51 instruction set and pin-out, ensuring seamless integration into existing designs.

A key feature of this microcontroller is the on-chip Flash memory, which allows the program memory to be reprogrammed in-system or by using a conventional non-volatile memory programmer. By combining a versatile 8-bit CPU with in-system programmable flash on a monolithic chip, it provides a highly flexible and powerful solution for embedded applications.

Core Features

This microcontroller includes 32 programmable I/O lines, a Watchdog timer, dual data pointers, and two 16-bit timer/counters. It also features a five-vector two-level interrupt architecture, a full duplex serial port, an on-chip oscillator, and clock circuitry. Designed with static logic, it operates down to zero frequency and supports two software-selectable power-saving modes for energy efficiency.

Technical Specifications

• Memory: 4KB In-system Programmable (ISP) Flash, 128 x 8-bit Internal RAM
• Endurance: 10,000 Write/Erase Cycles
• Operating Frequency: 0Hz to 33MHz Fully Static Operation (Max 24MHz operating)
• Security: Three-level Program Memory Lock
• Interfaces: SPI, UART (Full Duplex)
• Supply Voltage: 4V to 5.5V
• Operating Temperature: -40°C to 85°C
• Dimensions: 43mm x 33mm x 15mm

Whether for communications networking or general embedded design development, this microcontroller delivers reliable performance and flexible programming options, including byte and page modes with fast programming times.