The LM3S9790-IQC80-B1: The LM3S9790-IQC80-: The LM3S9790-IQC80- is a Texas Instruments Stellaris ARM Cortex-M3 microcontroller from the 9000 series, built around a 32-bit single-core processor running at 80 MHz.
Obsolete — plan your BOM around it
That means new designs should not target this MCU; existing BOM lines must source through the independent surplus and broker channel. The 128 KB Flash / 64 KB RAM and the rich peripheral set (CAN, Ethernet, USB OTG) make it a candidate for last-time-buy stocking if your production line still needs it.
The 80 MHz core clock on the ARM Cortex-M3 gives you single-cycle multiply and hardware divide, plus a deterministic interrupt controller. For a control loop that polls CAN messages, updates an Ethernet stack, and drives PWM outputs, this speed keeps the firmware responsive without needing a cache or prefetch buffer. The 60 available I/O pins in the 100-LQFP package leave headroom for local sensors, displays, and memory-mapped peripherals through the EBI/EMI interface.
Package and footprint — 100-LQFP (14x14 mm)
The LM3S9790-IQC80- comes in a 100-LQFP package with a 14x14 mm body, surface-mount only. The 60 I/O are distributed around the quad flat pack; standard 0.5 mm pitch applies.