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Texas Instruments LM3S5C31-IQC80-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5C31-IQC80-A2T ARM Cortex-M3 MCU, 80 MHz, 512KB Flash

MPNLM3S5C31-IQC80-A2T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 5000 LM3S5C31-IQC80-A2T, 32-bit MCU, 80 MHz, 512KB Flash, 64K x 8 RAM, 100-LQFP, -40°C to 85°C, 3V to 3.6V supply.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5C31-IQC80-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityCANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB
Number of i (O)67
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x12b
Program memory size512KB (512K x 8)

Product details

The 80 MHz core handles real-time tasks like motor commutation, sensor fusion, or USB packet processing with margin.

Peripheral set and industrial connectivity

The 16-channel 12-bit ADC covers analog inputs from sensors or current shunts.

Package and supply rail

Housed in a 100-LQFP (14x14 mm) package with 67 I/O pins, the LM3S5C31-IQC80-A2T operates from a single 3V to 3.6V supply. For a replacement or second-source candidate, verify pin compatibility and peripheral differences against the datasheet.

Frequently asked questions

What is the replacement for LM3S5C31-IQC80-A2T?

No official successor is listed for the LM3S5C31-IQC80-A2T. A commonly considered alternative is the TM4C123GH6PM series from the same Stellaris family — verify pin compatibility and peripheral differences against the datasheet before qualifying.