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Texas Instruments LM3S6950-IQC50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6950-IQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz, 256 KB Flash

MPNLM3S6950-IQC50-A2T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 6000 series LM3S6950-IQC50-A2T, 32-bit single-core MCU, 50 MHz, 256 KB Flash, 64 KB SRAM, 46 I/O, Ethernet + UART/SPI/I2C, 100-LQFP, -40°C to 85°C.

Texas Instruments LM3S6950-IQC50-A2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6950-IQC50-A2T 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~85°C(TA)
Speed50MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityEthernet, I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)46
Core processorARM® Cortex®-M3
Case100-LQFP
Program memory size256KB (256K x 8)

Product details

Stellaris Cortex-M3 with integrated Ethernet

The Texas Instruments LM3S6950-IQC50-A2T is a 32-bit ARM Cortex-M3 MCU from the Stellaris 6000 series, clocked at 50 MHz with 256 KB of Flash program memory and 64 KB of SRAM.

256 KB Flash and 64 KB SRAM — firmware and data budget

The 256 KB Flash is sized for moderate-complexity firmware — enough for a TCP/IP stack, a real-time OS kernel, and application logic without external memory. The 64 KB SRAM supports packet buffering for Ethernet traffic and local data logging; designs that exceed this budget will need to move to a higher-density sibling or add external SRAM.

100-LQFP package — footprint and rework

For rework or repair, a hot-air station with a fine nozzle and preheating from the board underside is recommended to avoid lifted pads. The 46 I/O lines are distributed around the perimeter, which simplifies routing on a two-layer board but demands attention to signal-integrity for the Ethernet differential pairs.

Frequently asked questions

Is LM3S6950-IQC50-A2T obsolete?

Yes, the LM3S6950-IQC50-A2T is officially marked as obsolete by Texas Instruments. It is no longer in production and is only available through surplus or broker channels.

What is the replacement for LM3S6950-IQC50-A2T?

No official replacement is listed in the available records. For new designs, consider a pin-compatible Stellaris family member with similar Ethernet and memory specifications, or migrate to a current TI Cortex-M4F or M7 device with Ethernet.

Where can I buy LM3S6950-IQC50-A2T?

This obsolete part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm offer.

What are the specifications of LM3S6950?

Key specifications: 32-bit ARM Cortex-M3 core at 50 MHz, 256 KB Flash, 64 KB SRAM, integrated Ethernet MAC/PHY, 46 I/O, operating voltage 2.25 V to 2.75 V, temperature range -40°C to 85°C, in a 100-LQFP package.

Is LM3S6950-IQC50-A2T compatible with LM3S6950-IQC50?

The LM3S6950-IQC50-A2T is a tape-and-reel variant of the base LM3S6950-IQC50 device. The -A2T suffix indicates packaging and reel quantity; the silicon, pinout, and specifications are identical. They are functionally interchangeable on the same PCB footprint.