80 MHz Cortex-M3 with industrial-grade peripheral set
The LM3S9U90-IBZ80-A2: On-chip memory comprises 384 KB of Flash and 96 KB of SRAM, providing enough headroom for a real-time control stack plus a TCP/IP or CANopen protocol layer without external memory. The connectivity set includes Ethernet MAC, USB OTG, two CAN 2.0B controllers, LIN, and multiple UART/SPI/I²C interfaces — covering the fieldbus and backplane communication needs of an industrial controller or gateway.
Memory, ADC, and GPIO budget for control applications
The 384 KB Flash (384K x 8) stores firmware and bootloader; the 96 KB SRAM (96K x 8) supports moderate data buffering — enough for a 100+ node CANopen master or a small web server on the Ethernet port. A 16-channel 12-bit ADC samples analog inputs from sensors or potentiometers; the 60 general-purpose I/O pins connect to external memory, displays, or keypads via the EBI/EMI bus.
Texas Instruments has classified the LM3S9U90-IBZ80-A2 as Obsolete. Each lot is verified for authenticity and traceability before quoting. The 108-BGA (10x10 mm) package and 1.235-1.365 V core supply are non-negotiable for a drop-in replacement — no second-source pin-compatible part is documented in the Stellaris family.
Housed in a 108-ball LFBGA (10x10 mm body), the LM3S9U90-IBZ80-A2 requires a multi-layer PCB with via-in-pad or microvia fan-out for the 0.80 mm ball pitch. The tray packaging supports automated pick-and-place assembly.