Texas Instruments Stellaris ARM Cortex-M3S 300 series MCU, LM3S317-IQN25-C2, 32-bit single-core at 25 MHz, 16 KB Flash, 4 KB RAM, 30 I/O, 6x10-bit ADC, SPI/SSI/UART, 48-LQFP, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 300 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 3V ~ 3.6V |
| Operating temperature | -40°C~85°C |
| Speed | 25MHz |
| Package | Tray |
| RAM size | 4K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | Microwire, SPI, SSI, UART/USART |
| Number of i (O) | 30 |
| Core processor | ARM® Cortex®-M3 |
| Case | 48-LQFP |
| Data converters | A/D 6x10b |
| Program memory size | 16KB (16K x 8) |
The LM3S317-IQN25-C2: The LM3S317 is a 32-bit ARM Cortex-M3 MCU from the Stellaris 300 series, clocked at 25 MHz with 16 KB of Flash and 4 KB of RAM. The 6-channel 10-bit ADC handles sensor feedback without an external converter.
Texas Instruments has marked the LM3S317 as obsolete. No factory orders or last-time-buy window remain. For a repair bench, the practical move is to source a known-good pull or NOS tray from independent distribution.
No official pin-compatible successor is listed in the manufacturer's records. The Stellaris family was superseded by the Tiva-C series, but pin compatibility requires a layout check — no direct drop-in replacement is confirmed.
The core runs at 25 MHz, which defines the processing bandwidth for interrupt latency and peripheral timing.