Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series, LM3S1W16-IQR50-C0T, 32-bit single-core MCU, 50 MHz, 32 KB Flash, 8 KB RAM, 1.08 V–1.32 V supply, 33 I/O, 64-LQFP, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 1000 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.08V ~ 1.32V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 50MHz |
| Package | Tape & Reel (TR) |
| RAM size | 8K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART |
| Number of i (O) | 33 |
| Core processor | ARM® Cortex®-M3 |
| Case | 64-LQFP |
| Data converters | A/D 8x10b |
| Program memory size | 32KB (32K x 8) |
The LM3S1W16-IQR50-C0T: The core logic runs from a narrow 1.08 V to 1.32 V supply. This means the board needs a dedicated low-voltage regulator for the core, while the I/O bank likely interfaces at a separate voltage.
For production sustainment or repair of existing designs, the part must be sourced through the independent distribution channel — new-old-stock or surplus inventory.
For a form-fit-function substitute, review the Stellaris family for a pin-compatible ARM Cortex-M3 device with the same 64-LQFP footprint and 1.08 V to 1.32 V core supply — but confirm the peripheral set and memory sizing against your firmware image.