Microchip Technology, Inc. Microcontrollers AT89C51RB2-SLRIL

The AT89C51RB2-SLRIL is an 8-bit microcontroller compatible with the 80C52 architecture, featuring 16K bytes of Flash memory and 1024 bytes of expanded RAM (XRAM). It supports a high-speed operation with clock frequencies of up to 40 MHz in standard mode and 20 MHz in X2 mode, depending on the supply voltage. The device includes multiple I/O ports, three 16-bit timer/counters, and a versatile interrupt system with nine sources and four priority levels. Key functionalities include in-system programming (ISP), a full duplex enhanced UART with a dedicated baud rate generator, and a programmable counter array for various applications such as pulse width modulation and motor control. The microcontroller operates within a temperature range of 0 to +70¬8C for commercial applications and -40 to +85¬8C for industrial use. It is available in multiple package options, including PDIL40, PLCC44, and VQFP44, making it suitable for a variety of embedded system designs.