Skip to main content
Log in
Texas Instruments LM3S5P31-IQC80-C1 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5P31-IQC80-C1 Stellaris ARM Cortex-M3 MCU, 80 MHz, 64 KB Flash, Obsolete

MPNLM3S5P31-IQC80-C1
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 5000 series 32-bit MCU, LM3S5P31-IQC80-C1, 80 MHz core, 64 KB Flash, 24 KB RAM, 67 GPIO, CAN/USB/I²C/SPI/UART, 100-LQFP, -40 to 85°C.

Texas Instruments LM3S5P31-IQC80-C1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5P31-IQC80-C1 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.08V ~ 1.32V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTray
RAM size24K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB
Number of i (O)67
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x10b
Program memory size64KB (64K x 8)

Product details

At 80 MHz, the Cortex-M3 can run a Modbus RTU or CANopen stack without starving the main application.

The 24 KB RAM handles a moderate packet buffer.

The peripheral list covers CAN, USB, multiple UARTs with IrDA and LIN support, SPI, I²C, and a quadrature encoder interface. The 16-channel 10-bit ADC is adequate for basic analog monitoring.

Obsolete — sourcing reality for the LM3S5P31-IQC80-C1

This part is officially obsolete per the manufacturer. No last-time-buy window remains. That means the only channel is the independent surplus and broker market — which is exactly where we source it. We can.

Replacement and cross-reference

No official direct replacement from TI is listed for this part. The revision variant shares the same base number but may carry errata differences.

Frequently asked questions

Is LM3S5P31-IQC80-C1 obsolete?

Yes, the LM3S5P31-IQC80-C1 is officially obsolete. No last-time-buy window remains; availability is limited to the independent surplus channel.

What is the replacement for LM3S5P31-IQC80-C1?

There is no official direct replacement from TI. The LM3S5P31-IQC80-A1 is a revision variant but may carry errata differences; verify compatibility. For a guaranteed fit, source the exact -C1 suffix through independent distribution.

What are the specifications of LM3S5P31-IQC80-C1?

Key specs: 80 MHz ARM Cortex-M3 core, 64 KB Flash, 24 KB RAM, 67 GPIO, CAN/USB/I²C/SPI/UART, 16-channel 10-bit ADC, 100-LQFP package, 1.08-1.32 V supply, -40°C to 85°C operating temperature.