72 MHz Cortex-M3 with 64 KB Flash — the workhorse MCU for industrial control
The STM32F103C8T7TR: The 48-LQFP package (7x7 mm) provides 37 I/Os and a rich peripheral set including CAN, USB, SPI, I2C, UART, and motor-control PWM.
64 KB Flash and 20 KB SRAM — sizing the firmware and data budget
The 64 KB Flash (64K x 8) and 20 KB SRAM (20K x 8) are on-chip.
The 48-LQFP (7x7 mm) is a standard JEDEC footprint with 0.5 mm pitch — easy to route on two-layer boards and reworkable with conventional hot-air stations. The Tape & Reel (TR) suffix indicates shipping in embossed carrier tape for automated pick-and-place.
Connectivity and peripherals for system integration
The STM32F103C8T7TR includes CANbus, USB (device), SPI, I2C, UART/USART, IrDA, and LINbus interfaces — a typical set for industrial sensor nodes, motor controllers, and human-machine interfaces. On-chip peripherals include DMA, motor-control PWM, a 12-bit ADC with 10 channels, a temperature sensor, and watchdog timers. The internal oscillator can serve as the system clock, though an external crystal improves accuracy for USB or CAN timing.
The base product number is STM32F103.