The ARM Cortex-M3 core runs at 25 MHz, which is the throughput ceiling for this MCU. At that clock rate, single-cycle multiply and a 3-stage pipeline give it enough headroom for control loops in motor drives, sensor fusion, and protocol bridging (UART-to-SPI gateways). Pair it with external serial Flash over SSI if you need more storage.
LM3S317-EQN25-C2 Stellaris ARM Cortex-M3 MCU, 25MHz
MPNLM3S317-EQN25-C2
Obsolete
Texas Instruments LM3S317-EQN25-C2, Stellaris ARM Cortex-M3S 300 series, 32-bit single-core at 25MHz, 16KB Flash, 4KB RAM, 30 I/O, 3V–3.6V, -40°C to 105°C, 48-LQFP tray.
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| 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 | 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 | 16KB (16K x 8) |
Product details
Frequently asked questions
Does LM3S317-EQN25-C2 have UART and SPI connectivity?
Yes, this MCU includes UART/USART and SPI interfaces, plus SSI and Microwire. The 30 I/O pins allow you to connect multiple serial peripherals simultaneously.