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Texas Instruments LM3S1165-IBZ50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1165-IBZ50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz

MPNLM3S1165-IBZ50-A2
NRND

Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series LM3S1165-IBZ50-A2, 32-Bit Single-Core MCU, 50MHz, 64KB Flash, 16K x 8 RAM, 108-LFBGA, -40°C~85°C.

$19.3855Ref. price · indicative, final on quote
Texas Instruments LM3S1165-IBZ50-A2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1165-IBZ50-A2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTray
RAM size16K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)43
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 4x10b
Program memory size64KB (64K x 8)

Product details

What this Cortex-M3 does on the board

The 108-ball BGA (10x10 mm) package keeps the footprint small, but that comes with a reflow and inspection cost — not a part you swap in the field with a soldering iron.

That is a self-contained control core for a sensor-fusion board or a small motor drive — no external supervisor needed.

That means Texas Instruments is winding down production; new designs should not start with this part. For existing BOM lines, you are looking at last-time-buy or independent-distribution sourcing.

Because this MCU is NRND, standard distributor stock is drying up.

Frequently asked questions

Where can I buy LM3S1165-IBZ50-A2?

We source the LM3S1165-IBZ50-A2 through independent distribution. Submit an RFQ; we will confirm availability and current pricing at quote time.

Is LM3S1165-IBZ50-A2 obsolete?

It is not yet fully discontinued, but new designs should avoid it, and existing BOM lines should plan for a replacement or last-time-buy.

What is the replacement for LM3S1165-IBZ50-A2?

For a pin-compatible alternative, check the Stellaris family for a similar Cortex-M3 with the same 108-BGA footprint, but verify the peripheral and memory match against your firmware.

What is LM3S1165-IBZ50-A2's listed speed?

The LM3S1165-IBZ50-A2 runs at 50 MHz, which is the core clock for the ARM Cortex-M3 processor.