Texas Instruments Stellaris ARM Cortex-M3S 800 series LM3S817-IQN50-C2, 32-bit single-core MCU at 50 MHz, 64 KB Flash, 8 KB RAM, 30 I/O, 48-LQFP (7x7 mm), 3.0–3.6 V supply, -40 to 85 °C.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 800 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 3V ~ 3.6V |
| Operating temperature | -40°C ~ 85°C (TA) |
| Speed | 50MHz |
| Package | Tray |
| RAM size | 8K 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 | 64KB (64K x 8) |
That means TI has flagged it for eventual end-of-life; it is still available for existing production runs but should not be specced into a new board spin. For a BOM that already carries this line, the procurement path is a last-time-buy or a bridge to a replacement part through independent distribution.
The 48-LQFP package has a 7x7 mm body. Standard reflow profile applies; check the MSL rating before the oven.
The LM3S817-IQN50-C2 is NRND (Not Recommended for New Designs), meaning TI is phasing it out. It is not yet discontinued but should not be selected for new projects. Existing production can continue through last-time-buy or surplus-channel sourcing.
The LM3S817-IQN50-C2 runs at 50 MHz, which is the maximum CPU clock for this Stellaris Cortex-M3 device. That throughput handles typical control loops, sensor processing, and serial communication without bus contention.
No — the NRND status means TI advises against new designs with this MCU. A same-family part with active lifecycle status is the safer choice for a new BOM.