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Texas Instruments LM3S5G31-IQC80-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5G31-IQC80-A2 Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S5G31-IQC80-A2
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5G31-IQC80-A2, 32-Bit Single-Core MCU, 80MHz, 384KB Flash, 64K x 8 RAM, 100-LQFP, -40°C~85°C.

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

Specifications

LM3S5G31-IQC80-A2 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
PackageTray
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)67
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x12b
Program memory size384KB (384K x 8)

Product details

The LM3S5G31-IQC80-A2: Its 80 MHz core clock and 384 KB of Flash program memory provide enough headroom for a single real-time control loop with a moderate communications stack — think motor-drive firmware with CANopen, or a multi-axis motion controller running sensor fusion. The 16-channel 12-bit ADC covers multi-phase current sensing or temperature monitoring without an external multiplexer.

Industrial temperature grade and connectivity

Obsolete — sourcing reality and the successor question

For production BOMs that require this exact footprint and peripheral set, the only channel is independent distribution —

Frequently asked questions

Is LM3S5G31-IQC80-A2 obsolete?

Yes, the lifecycle status is Obsolete. Texas Instruments no longer manufactures this device. It is available only through surplus and broker channels.

What is the replacement for LM3S5G31-IQC80-A2?

A redesign to a current TI Cortex-M4 or M7 MCU is required for new production. Within the same Stellaris family, a 100-LQFP variant with 80 MHz core may be pin-compatible, but the exact register map and peripheral set differ — firmware migration is necessary.