The LM3S1P51-IQC80-C5T is a Texas Instruments Stellaris ARM Cortex-M3 MCU clocked at 80 MHz, with 64 KB Flash and 24 KB RAM. The 67 GPIOs and serial stack (I²C, SPI, UART, QEI, IrDA, Microwire) connect to encoders, HMI panels, and sensors. The 16-channel 10-bit ADC covers analog feedback.
Texas Instruments LM3S1P51-IQC80-C5T Stellaris MCU, 80 MHz
MPNLM3S1P51-IQC80-C5T
Obsolete
Texas Instruments Stellaris ARM Cortex-M3S 1000 series MCU, 80 MHz ARM Cortex-M3 core, 64 KB Flash, 24 KB RAM, 67 I/O, 1.08–3.6 V supply, internal oscillator, 16x10b A/D, DMA, PWM, full serial stack (SPI/SSI/I²C/UART/QEI/IrDA/Microwire); -40 to 85°C in 100-LQFP; Tape & Reel.
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Series | Stellaris® ARM® Cortex®-M3S 1000 |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.08V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 80MHz |
| Package | Tape & Reel (TR) |
| RAM size | 24K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, I²S, POR, PWM, WDT |
| Connectivity | I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART |
| Number of i (O) | 67 |
| Core processor | ARM® Cortex®-M3 |
| Case | 100-LQFP |
| Data converters | A/D 16x10b |
| Program memory size | 64KB (64K x 8) |
Product details
Frequently asked questions
What is the closest pin-compatible alternative to LM3S1P51-IQC80-C5T?
No official pin-compatible successor or second-source alternate is recorded for this order code. If you need a drop-in replacement, the best path is to check the Stellaris family for a similar 100-LQFP part with matching Flash/RAM — but requalification is unavoidable.
What is LM3S1P51-IQC80-C5T's listed speed?
The core runs at 80 MHz.