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Texas Instruments LM3S8971-EQC50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S8971-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz

MPNLM3S8971-EQC50-A2T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 8000 series LM3S8971-EQC50-A2T, 32-bit single-core MCU, 50MHz, 256KB Flash, 64K x 8 SRAM, CANbus/Ethernet/IrDA/SPI/UART, 38 I/O, 100-LQFP, -40°C to 105°C.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S8971-EQC50-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 8000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C ~ 105°C (TA)
Speed50MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, Ethernet, IrDA, Microwire, QEI, 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

50 MHz Cortex-M3 — what it buys you

That puts it in the mid-range of the Stellaris 8000 series — enough for a real-time control loop with a TCP/IP stack and a CAN gateway running concurrently. The 64 KB SRAM is a single bank, so no bank-switching overhead for data buffers.

Peripheral set — CAN, Ethernet, and the rest

Connectivity includes CANbus, Ethernet MAC, IrDA, Microwire, QEI, SPI, SSI, and UART/USART. That combination targets industrial automation nodes that need both fieldbus (CAN) and plant-network (Ethernet) access. The 8-channel 10-bit ADC covers analog sensing like thermocouple or current-monitor inputs.

Housed in a 100-LQFP (14x14 mm) with 38 usable I/O.

Sourcing this part now

Because the LM3S8971-EQC50-A2T is obsolete, standard distributor stock is depleted. We source it through independent channels — verified, traceable inventory from surplus and broker networks. If you need a pin-compatible drop-in for a board already in production, the Stellaris family includes other 100-LQFP Cortex-M3 parts with similar peripheral maps, but no official cross-reference is published; verify the exact pinout against your schematic before ordering an alternate.

Frequently asked questions

Can LM3S8971-EQC50-A2T be used in new designs?

Not recommended. As an Obsolete part, availability is limited to surplus and broker channels. For a new design, look at current-production Stellaris or TM4C Cortex-M4 parts from Texas Instruments in a similar 100-LQFP footprint.