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Texas Instruments LM3S6938-EQC50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6938-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 256 KB Flash, Ethernet

MPNLM3S6938-EQC50-A2
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 6000 series, LM3S6938-EQC50-A2, 32-bit MCU, 50 MHz, 256 KB Flash, 64K x 8 RAM, Ethernet, 100-LQFP, -40°C to 105°C.

Texas Instruments LM3S6938-EQC50-A2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6938-EQC50-A2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 6000
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
ConnectivityEthernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)38
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 8x10b
Program memory size256KB (256K x 8)

Product details

What this Stellaris MCU brings to the board

The LM3S6938-EQC50-A2: The Texas Instruments LM3S6938 is a 32-bit ARM Cortex-M3 MCU from the Stellaris 6000 series, clocked at 50 MHz with 256 KB Flash and 64K x 8 RAM.

The 256 KB Flash leaves room for a moderate application firmware plus a network stack; the 64K x 8 RAM is adequate for packet buffering but not for large data logging. If your design needs more throughput or memory, you would be looking at a higher-tier Stellaris or a newer Cortex-M4 part — but for a dedicated Ethernet-to-serial bridge or a remote I/O controller, this MCU hits the sweet spot.

Obsolete — sourcing reality for the LM3S6938-EQC50-A2

The LM3S6938 is officially obsolete per the manufacturer's lifecycle status.

Housed in a 100-LQFP (14x14 mm) surface-mount package, the LM3S6938 is a standard footprint for mid-density MCUs.

Frequently asked questions

What is the replacement for LM3S6938-EQC50-A2?

No official replacement is listed for the LM3S6938-EQC50-A2. For new designs, consider a current-production ARM Cortex-M4 MCU with Ethernet; for legacy repairs, source the original part through independent distributors.

Does LM3S6938-EQC50-A2 have Ethernet?

Yes, the LM3S6938-EQC50-A2 includes Ethernet connectivity alongside I²C, SPI, SSI, UART, and IrDA interfaces.

What is the package for LM3S6938-EQC50-A2?

The LM3S6938-EQC50-A2 is supplied in a 100-LQFP (14x14 mm) surface-mount package.