Microchip AT89C51AC3-RDTUM 8-Bit Microcontroller Datasheet and Technical Overview
The Microchip AT89C51AC3-RDTUM is a high-performance, 8-bit microcontroller based on the classic 8051 architecture, enhanced with advanced features for modern embedded applications. This device combines the robustness of a well-established core with significant integrated peripherals, making it suitable for a wide range of industrial, automotive, and consumer applications.
Architectural Overview and Core Features
At its heart, the AT89C51AC3 leverages an 8051-compatible core operating at speeds up to 40 MHz. This provides a powerful and deterministic execution environment, beneficial for real-time control tasks. A key enhancement is its on-chip 64KB Flash memory for program storage, which is both in-system programmable (ISP) and in-application programmable (IAP), offering exceptional flexibility for firmware updates in the field. This is complemented by 2KB of RAM and an additional 2KB of data EEPROM, providing ample space for volatile data and non-volatile parameter storage without requiring external components.
Integrated Peripherals for System Expansion
The device is distinguished by its rich set of integrated peripherals, which reduce system complexity and board space. It features a 10-bit, 8-channel Analog-to-Digital Converter (ADC), enabling direct interfacing with analog sensors. For communication, it is equipped with multiple serial interfaces: a Full-Duplex UART, a Serial Peripheral Interface (SPI), and an Enhanced Two-Wire Interface (TWI) compatible with I²C. Furthermore, it includes a Programmable Counter Array (PCA) with capture/compare modules and PWM capabilities, offering precise timing control for motor drives and other waveforms.
Development Support and Robustness
Development is supported by a suite of tools, including the Keil C51 compiler and in-circuit emulators. The microcontroller is designed for high-noise industrial environments, featuring a robust construction and wide operating voltage range. Its package, a Lead (Pb)-free 64-lead TQFP, ensures easy integration into modern, RoHS-compliant designs.
ICGOOODFIND Summary: The AT89C51AC3-RDTUM is a highly integrated and powerful 8-bit MCU that successfully modernizes the venerable 8051 core. Its substantial on-chip memory, versatile analog and digital peripherals, and strong development ecosystem make it an excellent choice for designers seeking a reliable and familiar architecture for complex embedded control systems.
Keywords: 8-Bit Microcontroller, 8051 Architecture, In-System Programmable (ISP) Flash, Analog-to-Digital Converter (ADC), Programmable Counter Array (PCA).
