Skip to main content
Log in
Texas Instruments LM3S2939-EQC50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S2939-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 256 KB Flash

MPNLM3S2939-EQC50-A2
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 2000 series MCU, LM3S2939-EQC50-A2, 32-Bit Single-Core, 50MHz, 256KB Flash, 64K x 8 RAM, CANbus/I²C/SPI/UART, 57 I/O, 100-LQFP, -40°C~105°C.

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

Specifications

LM3S2939-EQC50-A2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 2000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~105°C(TA)
Speed50MHz
PackageTray
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)57
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 3x10b
Program memory size256KB (256K x 8)

Product details

It runs at 50 MHz from a 2.25 V to 2.75 V supply, with 256 KB of Flash program memory and 64 KB of RAM — enough for moderate-complexity firmware stacks like motor control loops, CAN-based sensor fusion, or multi-protocol gateway logic.

Texas Instruments has marked the LM3S2939-EQC50-A2 as Obsolete. No official successor part number is published for this specific variant. For new designs, look at the TM4C12x family or other active Cortex-M4 parts in the same 100-LQFP footprint — but pin compatibility is not guaranteed.

Frequently asked questions

What is the recommended replacement for LM3S2939-EQC50-A2?

Texas Instruments has not published an official direct replacement for this specific order code. For new designs, consider the TM4C12x series of Cortex-M4 MCUs from TI, which share a similar peripheral set and 100-LQFP package option, but verify pin compatibility and software migration requirements before committing the BOM.

What is LM3S2939-EQC50-A2's listed speed?

The core runs at 50 MHz, which is the maximum clock frequency for this Cortex-M3 device.