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Texas Instruments LM3S6918-EQC50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6918-EQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz

MPNLM3S6918-EQC50-A2
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 6000 series LM3S6918-EQC50-A2, 32-bit single-core MCU, 50 MHz, 256 KB Flash, 64 KB SRAM, 38 I/O, Ethernet, I²C, SPI, UART, 8x10-bit ADC, -40 to 105°C, 100-LQFP.

Texas Instruments LM3S6918-EQC50-A2 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6918-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 MCU brought to the board

The LM3S6918-EQC50-A2: The 8-channel 10-bit ADC and 38 general-purpose I/O lines make it suitable for industrial sensor hubs, building automation gateways, and simple embedded Ethernet nodes.

Texas Instruments ended production of the Stellaris LM3S6918-EQC50-A2. If you have an active BOM line using this MCU, you are now dependent on surplus and broker-channel inventory. There is no official TI successor listed in the record; the Stellaris line was folded into the Tiva-C family, but pin-compatibility is not guaranteed without a full design review.

The 50 MHz core clock runs a lightweight TCP/IP stack alongside a control loop. The 64 KB SRAM provides about 40 KB of usable heap after the stack and RTOS kernel.

The 100-LQFP (14x14 mm) is a surface-mount package.

Frequently asked questions

Is LM3S6918-EQC50-A2 obsolete?

Yes, the LM3S6918-EQC50-A2 carries an Obsolete lifecycle status. It is no longer in production from Texas Instruments.

What is the replacement for LM3S6918-EQC50-A2?

No official direct replacement is listed in the record. The Stellaris family was superseded by the Tiva C series, but pin-compatibility and software migration require a full design review. For a like-for-like drop-in, you will need to source from surplus inventory.