Texas Instruments Stellaris ARM Cortex-M3S 9000 series 32-bit MCU, LM3S9B81-IBZ80-C3, 80 MHz core, 256 KB Flash, 96 KB RAM, 65 I/O, Ethernet/CAN/USB OTG, 108-BGA.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 9000 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.235V ~ 1.365V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 80MHz |
| Package | Tray |
| RAM size | 96K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT |
| Connectivity | CANbus, EBI/EMI, Ethernet, I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART, USB OTG |
| Number of i (O) | 65 |
| Core processor | ARM® Cortex®-M3 |
| Case | 108-LFBGA |
| Data converters | A/D 16x10b |
| Program memory size | 256KB (256K x 8) |
80 MHz on a Cortex-M3 core handles a real-time control loop plus a TCP/IP stack and CANopen without saturating the core. The 96 KB RAM gives enough headroom for two Ethernet frame buffers and a modest RTOS heap.
Within the Stellaris 9000 series, a sibling with the same 108-BGA footprint and similar peripheral set (e.g., LM3S9B92) may be pin-compatible, but TI has not published a direct cross-reference. The Tiva TM4C series is not pin-compatible. Verify against your PCB layout before committing.
The core runs at 80 MHz.
It belongs to the Stellaris ARM Cortex-M3S 9000 series.