Texas Instruments Stellaris® ARM® Cortex®-M3S 100 series LM3S102-EQN20-C2, 32-bit MCU, 20 MHz, 8 KB Flash, 2 KB RAM, 18 I/O, I²C/SPI/UART, -40°C to 105°C, 48-LQFP.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 100 |
| 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 | 20MHz |
| Package | Tray |
| RAM size | 2K 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) | 18 |
| Core processor | ARM® Cortex®-M3 |
| Case | 48-LQFP |
| Program memory size | 8KB (8K x 8) |
The LM3S102-EQN20-C2: That clock rate places it firmly in the low-power, control-oriented tier — think sensor polling, simple motor commutation, or protocol bridging — not the 100+ MHz performance band. The 8 KB Flash and 2 KB RAM (2K x 8) are tight: you'll want to budget firmware size early, especially if you're adding a real-time OS or a TCP/IP stack.
Design engineers need to verify pin compatibility and electrical specs before PCB layout.
Sourcing buyers need current pricing and stock levels to complete bill of materials.
Buyers and brokers need lifecycle status to avoid supply chain risk or plan for replacement.
When stock is low, a cross-reference part (e.g., LM3S102-EQN20-C2T?) ensures uninterrupted production.
Firmware engineers need to know programming tool compatibility before starting development.
Manufacturing planners need packaging format to ensure pick-and-place compatibility.