Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series, LM3S1968-EQC50-A2T, 32-bit MCU, 50 MHz, 256 KB Flash, 64 KB RAM, 52 I/O, I²C/SPI/UART/SSI/QEI, 100-LQFP, -40 to 105 °C.
| 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 | Tape & Reel (TR) |
| RAM size | 64K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, POR, PWM, WDT |
| Connectivity | I²C, IrDA, Microwire, QEI, 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 | 256KB (256K x 8) |
The LM3S1968-EQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Texas Instruments Stellaris® series, built on the Cortex-M3S 1000 core architecture.
At 50 MHz the Cortex-M3 core delivers integer throughput suitable for a single PID loop at 10 kHz with sensor filtering and Modbus framing in the background. The 64 KB SRAM provides about 40 KB of usable heap after the RTOS and stack.
Texas Instruments has not published a direct pin-compatible successor for the LM3S1968-EQC50-A2T under the Stellaris brand. The closest functional migration path is to the TM4C123x series (Cortex-M4F) or the TM4C129x series (Cortex-M4F with Ethernet), but these require a PCB layout change and firmware port. No drop-in replacement exists.
We source the LM3S1968-EQC50-A2T through independent distribution — surplus inventory and broker channels. Submit an RFQ for current availability and pricing; we confirm both at quote time. No stock or price figures are published here.
The LM3S1968-EQC50-A2T is a 32-bit ARM Cortex-M3 MCU running at 50 MHz, with 256 KB Flash, 64 KB SRAM, 52 I/O, an 8-channel 10-bit ADC, and serial interfaces including I²C, SPI, SSI, UART, IrDA, and QEI. It operates from 2.25 V to 2.75 V over -40 to 105 °C, in a 100-LQFP package.