The AT89C51RB2T-RLTUM is an 8-bit microcontroller manufactured by Microchip. This MCU offers enhanced features such as improved I/O versatility, enhanced UART baud rate, buzzer output, and low power consumption. The device has 128 bytes of on-chip RAM, 8K of programmable Flash memory, and a 16-bit timer/counter. The AT89C51RB2T-RLTUM supports on-chip voltage brown-out and power-on reset detection. It also features a very low standby current, efficient two-level low power modes, and a 128-byte, 8-bit user-programmable EEPROM that can be used for data retention. The AT89C51RB2T-RLTUM is ideal for applications with moderate I/O requirements such as consumer electronics, metering systems, portable electronics, appliance control, and instrumentation.