Texas Instruments Stellaris® ARM® Cortex®-M3S 2000 series MCU, LM3S2651-IQC50-A2, 32-bit single-core, 50 MHz, 128KB Flash, 32KB RAM, 53 I/O, CANbus/I²C/SPI/SSI/UART/USART, 2.25–2.75V supply, -40°C to 85°C, 100-LQFP.
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 2000 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 2.25V ~ 2.75V |
| Operating temperature | -40°C~85°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 | CANbus, I²C, IrDA, Microwire, SPI, SSI, UART/USART |
| Number of i (O) | 53 |
| Core processor | ARM® Cortex®-M3 |
| Case | 100-LQFP |
| Data converters | A/D 4x10b |
| Program memory size | 128KB (128K x 8) |
The LM3S2651-IQC50-A2: The 53 general-purpose I/O lines and four 10-bit ADC channels provide enough headroom for sensor aggregation and actuator control without an external CPLD or ADC.
For production support or repair stock, the only channel is independent distribution — surplus inventory, new-old-stock, or broker-sourced units.
The exposed pad (if present on this variant) should be stitched to the ground plane with thermal vias for heat sinking.
Yes, Texas Instruments lists this part as obsolete. No factory production or last-time-buy window is active. Sourcing is limited to surplus and broker inventory.
Yes, the connectivity block includes a CANbus controller, along with I²C, IrDA, Microwire, SPI, SSI, and UART/USART interfaces.
No official replacement part number is published in the lifecycle record. A pin-compatible alternate may exist within the Stellaris family, but it is not documented here. For a drop-in substitute, review the Stellaris ARM Cortex-M3 2000 series portfolio for a similar memory and peripheral set.