The Texas Instruments LM3S5C31-IBZ80-A1 is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 5000 series, clocked at 80 MHz. It carries 512 KB of Flash program memory and 64 KB of SRAM, with 67 general-purpose I/O lines.
Texas Instruments LM3S5C31-IBZ80-A1 ARM Cortex-M3 MCU, 80 MHz
MPNLM3S5C31-IBZ80-A1
Obsolete
Texas Instruments Stellaris ARM Cortex-M3S 5000 LM3S5C31-IBZ80-A1, 32-bit single-core MCU at 80 MHz, 512 KB Flash, 64 KB SRAM, 67 I/O, CAN/USB/LIN/SPI/SSI, 3.0–3.6 V supply, -40 to 85 °C, 108-LFBGA tray.
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 5000 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 3V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 80MHz |
| Package | Tray |
| RAM size | 64K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, POR, PWM, WDT |
| Connectivity | CANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB |
| Number of i (O) | 67 |
| Core processor | ARM® Cortex®-M3 |
| Case | 108-LFBGA |
| Data converters | A/D 16x12b |
| Program memory size | 512KB (512K x 8) |
Product details
Frequently asked questions
Where can I buy LM3S5C31-IBZ80-A1 and get a price?
We source this obsolete MCU through independent distribution. Submit an RFQ for current availability and pricing — no minimum order, and quotes are confirmed at time of request.
What is the closest pin-compatible alternative to LM3S5C31-IBZ80-A1?
No official pin-compatible replacement exists from Texas Instruments for this specific Stellaris 5000 series device. For new designs, consider a current Cortex-M4 or M7 MCU with similar CAN/USB/LIN peripherals; for legacy BOMs, we source the original part against an RFQ.
What is LM3S5C31-IBZ80-A1's listed speed?
The core runs at 80 MHz, delivering approximately 100 DMIPS on the Cortex-M3 pipeline.