ARM Cortex-M3 at 80 MHz with Ethernet and USB OTG
The LM3S9DN5-IBZ80-A1: On-chip data conversion comes from a 16-channel 12-bit ADC. This part is packaged in a 108-ball LFBGA (10x10 mm) with 72 general-purpose I/O lines.
80 MHz core — timing budget for networked control
The 80 MHz Cortex-M3 core, combined with the DMA controller and the peripheral set, handles protocol stacks for Ethernet, USB, and CAN without a separate network coprocessor. The 512 KB Flash is large enough for a TCP/IP stack plus application code; the 96 KB RAM supports multiple packet buffers. The internal oscillator keeps BOM count low, though an external crystal improves clock accuracy for Ethernet timing.
Obsolete — last-time-buy and surplus sourcing
The lifecycle status is Obsolete. TI has ended production of this Stellaris-series device. For existing BOM lines, procurement must go through independent distribution or the surplus market.
108-ball BGA — layout considerations
The 108-LFBGA package measures 10x10 mm with a 0.8 mm ball pitch typical for this class. The fine-pitch BGA requires a multi-layer PCB with microvia capability for fanout. Decoupling should follow the supply pin map — the core runs from a 1.235 V to 1.365 V rail, separate from the 3.3 V I/O supply.