80 MHz Cortex-M3 with industrial connectivity — what it brings to the BOM
The 100-LQFP package exposes 60 GPIOs. This part was designed for networked industrial control, building automation, and motor-drive applications where a single chip handles both the control loop and the fieldbus or Ethernet link.
Industrial temperature rating — deployment scope
The core supply is a tight 1.235 V to 1.365 V — a dedicated 1.3 V rail is needed, not a shared 3.3 V bus.
The Stellaris line was acquired by TI and later phased out in favour of the Tiva-C and Hercules families, but those are not pin-compatible. For a BOM that already carries this part, the remaining supply is in the surplus and broker channel — sealed reels with consistent date-codes are the preferred buy.
Pin-compatible alternatives in the Stellaris family
Within the same 100-LQFP Stellaris 9000 series, the LM3S9U92 shares the same footprint and peripheral set but adds a second Ethernet MAC. The LM3S9U90 and LM3S9U92 are pin-compatible, so a board designed for the LM3S9U90 can accept the LM3S9U92 without a layout change, provided the firmware accounts for the extra Ethernet port.