80 MHz Cortex-M3 with integrated Ethernet and CAN
The LM3S9790-IQC80-C3: Stellaris ARM Cortex-M3 MCU from TI, 9000 series. Runs at 80 MHz with 32-bit single-core Cortex-M3, 128 KB Flash, 64K x 8 SRAM. Peripherals include 16-channel 10-bit ADC, brown-out detect, DMA, I²S, PWM, WDT. Connectivity: CANbus, Ethernet, USB OTG, I²C, SPI, UART/USART. 100-LQFP package, 1.235 V to 1.365 V supply, -40°C to 85°C.
Sourcing and lifecycle
This part is marked obsolete by the manufacturer. For new production or BOM replenishment, it is available through independent distribution — sourced and quoted to order against an RFQ. No official pin-compatible successor is listed in the available records; a design migration to a current Stellaris or Tiva C-series device should be evaluated for volume builds. Availability and current pricing are confirmed at quote time.
80 MHz clock — what it means for control and protocol throughput
The 80 MHz Cortex-M3 core handles real-time control loops and protocol stacks without external glue logic. The integrated Ethernet MAC and CAN controllers allow this single chip to serve as a fieldbus gateway or motor drive controller, processing incoming packets and responding within microseconds. The 60 GPIOs give enough headroom for parallel sensor interfaces and display buses.
Industrial temperature grade and package
Rated for -40°C to 85°C ambient. 100-LQFP package. Supply range 1.235 V to 1.365 V.