Texas Instruments Stellaris® ARM® Cortex®-M3S 300 series MCU, LM3S328-EQN25-C2T, 32-bit single-core ARM Cortex-M3, 25 MHz, 16 KB Flash, 4 KB RAM, 8-channel 10-bit ADC, 28 I/O, 48-LQFP, -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 | Tape & Reel (TR) |
| 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) | 28 |
| Core processor | ARM® Cortex®-M3 |
| Case | 48-LQFP |
| Data converters | A/D 8x10b |
| Program memory size | 16KB (16K x 8) |
The Texas Instruments LM3S328-EQN25-C2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 300 series, running at 25 MHz with 16 KB of Flash and 4 KB of RAM. It packs a 10-bit ADC with eight channels, 28 general-purpose I/O lines, and serial interfaces covering I²C, SPI, Microwire, SSI, and UART/USART — enough connectivity for a sensor hub or a simple motor-control front-end.
No official pin-compatible direct replacement is listed by Texas Instruments for this exact order code. The Stellaris 300 series shares a common 48-LQFP footprint, but firmware and peripheral compatibility must be verified against the specific alternate part number before substitution.
The core runs at 25 MHz — adequate for serial communication and basic control loops, but not for high-speed data processing or real-time audio.