TI LM3S800-IQN50-C2: 50MHz ARM Cortex-M3 MCU, 64KB Flash, 36 I/O, 48-LQFP
Texas Instruments Stellaris LM3S800-IQN50-C2, a 50MHz ARM Cortex-M3 32-bit single-core MCU in 48-LQFP tray; 64KB Flash, 8KB RAM, 36 I/O, SPI/I²C/UART/USART/SSI/Microwire; 3V–3.6V supply; internal oscillator; brown-out detect/POR/WDT/PWM; -40°C to 85°C operating temperature.
- 100% new & originalTraceable channels only — no refurbs, no pulls, no remarked parts.
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- MSL-compliant ESD packingMoisture-sealed bags with indicator cards; reels photo-verified.
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Specifications
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 800 |
| Mounting type | 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 | I²C, Microwire, SPI, SSI, UART/USART |
| Number of i (O) | 36 |
| Core processor | ARM® Cortex®-M3 |
| Case | 48-LQFP |
| Program memory size | 64KB (64K x 8) |
Frequently asked questions
What TI part replaces the LM3S800-IQN50-C2?
Texas Instruments migrated the Stellaris family to the Tiva C Series. The Tiva TM4C family carries the same ARM Cortex-M3 core, a compatible peripheral architecture, and 48-LQFP options. The exact pin-compatible part number depends on I/O count and feature mix — request the specific cross-reference from TI or your distribution FAE.
What is the UART/USART baud-rate capability with the internal oscillator on this part?
The 50MHz system clock drives the baud-rate generator; UART/USART is listed in the connectivity peripherals. Baud-rate accuracy at 115200 bps depends on the internal oscillator tolerance against the ideal divisor — the internal RC tolerance spec sets whether the framing error budget is met without an external crystal. Verify against the Stellaris datasheet before dropping the crystal from a Profinet or Modbus retrofit BOM.
What is the maximum I/O sink/source current per pin and package thermal limit at 85°C ambient in the 48-LQFP?
The 48-LQFP at 85°C ambient with 50MHz core loading is a thermal constraint the design engineer must check against the package thermal resistance (θJA) and the total power dissipation. The specific per-pin current limit and derating curve are in the Stellaris datasheet — for a sealed IP67 enclosure, the junction-to-ambient thermal path is the limiting factor, not the pin current rating alone.
Does the LM3S800-IQN50-C2 require programming before board assembly, and what tools are needed?
This MCU ships with Flash blank; it requires factory or board-level programming before or after assembly using a JTAG/SWD debugger (TI Stellaris ICDI, or third-party ARM debug probe). The programming toolchain is Keil MDK, TI CCS, or IAR EWARM — firmware is not pre-loaded. If the retrofit is a swap of an already-programmed unit, the programming step is a separate BOM line the panel builder must account for.