Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series, LM3S1608-EQC50-A2, 32-Bit Single-Core MCU, 50MHz, 128KB Flash, 32K x 8 RAM, 52 I/O, 100-LQFP (14x14), -40°C~105°C, 2.25V~2.75V.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 1000 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 2.25V ~ 2.75V |
| Operating temperature | -40°C~105°C(TA) |
| Speed | 50MHz |
| Package | Tray |
| RAM size | 32K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | I²C, IrDA, Microwire, SPI, SSI, UART/USART |
| Number of i (O) | 52 |
| Core processor | ARM® Cortex®-M3 |
| Case | 100-LQFP |
| Data converters | A/D 8x10b |
| Program memory size | 128KB (128K x 8) |
The Texas Instruments LM3S1608-EQC50-A2 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris series, running at 50 MHz with 128 KB of Flash program memory and 32 KB of RAM.
At 50 MHz, the Cortex-M3 delivers enough throughput for real-time control loops — think PID updates at a few kHz, Modbus RTU packet handling, or sensor fusion for a basic motor drive. It is not a high-end part for heavy DSP or graphics; the 32 KB RAM limits buffering, so keep your data structures lean.
Yes, the LM3S1608-EQC50-A2 is obsolete and no longer in production. The only supply route is through surplus or broker channels.
The core runs at 50 MHz, which is typical for a mid-range Cortex-M3 handling control loops and serial protocol stacks.