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Texas Instruments LM3S6611-IBZ50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6611-IBZ50-A2T Stellaris ARM Cortex-M3 MCU, 50MHz

MPNLM3S6611-IBZ50-A2T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 6000 series, LM3S6611-IBZ50-A2T, 32-Bit Single-Core MCU, 50MHz, 128KB Flash, 32K x 8 RAM, Ethernet, I²C, SPI, UART, 46 I/O, 108-LFBGA, -40°C~85°C.

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

Specifications

LM3S6611-IBZ50-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 size32K 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)46
Core processorARM® Cortex®-M3
Case108-LFBGA
Program memory size128KB (128K x 8)

Product details

No further production runs are planned. Any stock you find is new-old-stock or surplus pulled from the authorized channel before the last-time-buy window closed. The laser etch and top-marking consistency across a lot are your first check — a mismatched date-code font or sanded surface on a BGA package is a counterfeit flag. We source this part exclusively through independent distribution and authenticate each reel or tray before it ships.

50 MHz Cortex-M3 with Ethernet — the peripheral set

The Ethernet MAC is the headline peripheral — it puts a full 10/100 MII interface on the die, which was a differentiator for this generation of Stellaris parts. Alongside Ethernet you get I²C, SPI, SSI, Microwire, IrDA, and UART/USART connectivity, plus 46 GPIOs, PWM, a watchdog timer, and brown-out detect/POR.

The 108-LFBGA package measures 10x10 mm with a 0.8 mm ball pitch. That pitch is comfortable for a standard BGA rework station — no micro-BGA tricks — but the 10x10 array still needs a good x-ray after reflow to catch head-in-pillow voids. MSL rating is not in the record, so treat it as MSL 3 unless a date-code trace gives you the bake history.

Frequently asked questions

Is LM3S6611-IBZ50-A2T obsolete?

Yes. No further factory orders are accepted. Any units in the supply chain are from prior production runs.

What is the replacement for LM3S6611-IBZ50-A2T?

The Stellaris family was succeeded by TI's Tiva and later MSP432 and TM4C series, but pin-compatibility and software migration require a full design review. For a pin-compatible drop-in, check the LM3S6611-IBZ50-A2T's sibling variants within the Stellaris 6000 series — they share the same 108-BGA footprint and peripheral set, though Flash and RAM sizes differ across the family.

Does LM3S6611-IBZ50-A2T have Ethernet?

Yes. The LM3S6611-IBZ50-A2T includes an Ethernet MAC controller as part of its connectivity block, alongside I²C, SPI, SSI, UART, IrDA, and Microwire interfaces.