The LM3S5C31-IBZ80-A2 is a Texas Instruments Stellaris ARM Cortex-M3 MCU running at 80 MHz with 512 KB of Flash and 64K x 8 of RAM. The 12-bit ADC with 16 channels covers analog sensing for current, voltage, and temperature monitoring on a single chip.
LM3S5C31-IBZ80-A2 Stellaris ARM Cortex-M3 MCU, 80MHz, 512KB Flash
MPNLM3S5C31-IBZ80-A2
Obsolete
Texas Instruments Stellaris ARM Cortex-M3S 5000 series MCU, LM3S5C31-IBZ80-A2, 32-bit single-core at 80MHz, 512KB Flash, 64K x 8 RAM, 67 I/O, 108-LFBGA, -40°C to 85°C.
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
Is LM3S5C31-IBZ80-A2 obsolete or end of life?
Yes, the LM3S5C31-IBZ80-A2 is obsolete. The manufacturer has marked it end-of-life with no further production planned.
What is the direct replacement for LM3S5C31-IBZ80-A2?
No official direct replacement is listed in the available documentation. The LM3S5C31-IBZ80-A1 is a variant but not a confirmed pin-compatible drop-in. A current-generation Cortex-M3 or M4 MCU in the same 108-BGA footprint would require a full design review.
What is LM3S5C31-IBZ80-A2's listed speed?
The core runs at 80 MHz. This is the maximum clock frequency for the ARM Cortex-M3 processor on this device.
Can LM3S5C31-IBZ80-A2 be used as a replacement for LM3S5C31-IBZ80-A1?
The base product number is the same, suggesting the same silicon, but the suffix difference (A2 vs A1) may indicate a different temperature grade or package variant. Without a published cross-reference, verify pinout and electrical specs against your design before substituting.