Texas Instruments Stellaris ARM Cortex-M3S 5000 series MCU, LM3S5G36-IQR80-A2, 80 MHz, 384 KB Flash, 64 KB RAM, 64-LQFP, 33 I/O, CAN/USB/UART/SPI/SSI, -40°C to 85°C, Tray.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 5000 |
| 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 | 80MHz |
| Package | Tray |
| RAM size | 64K 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 8x12b |
| Program memory size | 384KB (384K x 8) |
The LM3S5G36-IQR80-A2 is a 32-bit ARM Cortex-M3 MCU from the Stellaris series, clocked at 80 MHz with 384 KB of Flash and 64 KB of SRAM. It includes CAN, USB, UART, SPI, SSI, I²C, IrDA, LIN, QEI, and an 8-channel 12-bit ADC.
Texas Instruments has marked the LM3S5G36-IQR80-A2 as obsolete.
The Stellaris family includes other 64-LQFP variants with the same pinout, but the evidence does not list a specific official replacement. Check the LM3S5G36 base number for density variants — any substitution must be validated against your firmware's memory and peripheral requirements.
The core runs at 80 MHz, which drives the timing budget for bus interfaces and real-time control loops.