MicroelectronicsThe STC89C58RD+40I-PDIP40 with 32KB 1.25KB FLASH 35 51Series DIP-40 Microcontroller Unit (MCU/MPU/SOC) is a RoHS-compliant unit manufactured by STC Microelectronics. It is a single-chip 8-bit microcontroller based on the high performance 8051 CPU core and provides a high level of integration. It has 32KB built-in Flash memory, an integrated 4KB internal RAM and 1.25KB Flash Program Memory, and an on-chip clock oscillator. With its 40-pin dual in-line package, this low-cost solution is ideal for embedded systems applications. It has multiple operating modes, 2 capture/compare/PWM timers, 3 16-bit timers, an 8-channel 10-bit A/D converter, 8K bytes of SRAM, and flash memory. It also supports multiprocessing, UART, SPI, I2C, and various other peripheral devices. This MCU is designed to operate over a wide operating temperature range of -40°C to +85°C.