Texas Instruments Stellaris ARM Cortex-M3S 5000 series MCU, LM3S5K36-IQR80-C3T, 32-bit single-core, 80 MHz, 128 KB Flash, 24 KB RAM, CAN/USB/I²C/SPI/UART, 33 I/O, 8x10-bit ADC, -40°C to 85°C, 64-LQFP.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 5000 |
| Mounting type | 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 | 80MHz |
| Package | Tape & Reel (TR) |
| RAM size | 24K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | CANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB |
| Number of i (O) | 33 |
| Core processor | ARM® Cortex®-M3 |
| Case | 64-LQFP |
| Data converters | A/D 8x10b |
| Program memory size | 128KB (128K x 8) |
Expert opinion by Obsolete-Hunter Odette · Obsolescence & Last-Time-Buy Sourcing Trader
The LM3S5K36-IQR80-C3T is a 32-bit ARM Cortex-M3 MCU from the Stellaris 5000 series, clocked at 80 MHz with 128 KB of Flash and 24 KB of RAM.
128 KB of Flash holds moderate firmware stacks. The 24 KB RAM (24K x 8) leaves headroom for packet buffers and stack.
The core runs at 80 MHz, which positions it in the mid-range of Cortex-M3 parts — adequate for real-time control loops and moderate protocol stacks.