Texas Instruments Stellaris® ARM® Cortex®-M3S 300 series LM3S300-EGZ25-C2, 32-Bit Single-Core MCU, 25MHz, 16KB Flash, 4K x 8 RAM, 36 I/O, I²C/Microwire/SPI/SSI/UART, 48-VFQFN Exposed Pad, -40°C to 105°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~105°C(TA) |
| Speed | 25MHz |
| Package | Tray |
| RAM size | 4K 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-VFQFN Exposed Pad |
| Program memory size | 16KB (16K x 8) |
The part is built for cost-sensitive control applications where a full-featured Cortex-M3 core is needed but memory footprint stays small — think sensor hubs, motor-control interfaces, and protocol-bridge nodes in industrial or building-automation gear.
The 36 GPIOs are enough for a parallel LCD interface or a modest keypad matrix plus serial peripherals. Connectivity covers I²C, SPI, SSI, Microwire, and UART/USART — the usual set for sensor aggregation and actuator control.
No official direct replacement is listed. The LM3S300-EGZ25-C2 is still active, so a replacement is not required. For a pin-compatible alternative within the same family, the LM3S300-EGZ25-C1 shares the same die and package but may carry a different temperature grade or qualification level — verify the specific suffix differences against your application requirements.
The core runs at 25 MHz. That is the maximum clock frequency for this device, which sets the processing throughput for control loops and communication tasks.