Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series, LM3S5G31-IBZ80-A2T, 32-bit single-core MCU, 80MHz, 384KB Flash, 64KB RAM, 3V–3.6V supply, 108-LFBGA package, -40°C to 85°C.
| 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 | Tape & Reel (TR) |
| RAM size | 64K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT |
| Connectivity | CANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART |
| Number of i (O) | 67 |
| Core processor | ARM® Cortex®-M3 |
| Case | 108-LFBGA |
| Data converters | A/D 16x12b |
| Program memory size | 384KB (384K x 8) |
The LM3S5G31-IBZ80-A2T: 67 I/O lines in a 108-BGA package support parallel displays, QEI, and EBI/EMI.
The integrated 16-channel 12-bit ADC handles analog feedback from current sensors or thermocouples. Brown-out detect and POR keep the system safe during supply dips, and the internal oscillator reduces external component count.
Yes, the LM3S5G31-IBZ80-A2T is listed as Obsolete. It is no longer in production from Texas Instruments. For existing BOM lines, the part must be sourced through surplus or broker channels.
No official replacement or pin-compatible successor is documented in the available records. For new designs, consider current-generation Cortex-M4 or M7 MCUs with similar peripheral sets and BGA packages, but a direct drop-in is not available.