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Texas Instruments LM3S1N11-IBZ50-C3 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1N11-IBZ50-C3 ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash

MPNLM3S1N11-IBZ50-C3
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series MCU, LM3S1N11-IBZ50-C3, 32-bit single-core ARM Cortex-M3 at 50 MHz, 64 KB Flash, 12 KB RAM, 67 I/O, 108-LFBGA, -40 to 85°C.

Texas Instruments LM3S1N11-IBZ50-C3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1N11-IBZ50-C3 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.08V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTray
RAM size12K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART
Number of i (O)67
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 8x10b
Program memory size64KB (64K x 8)

Product details

The LM3S1N11-IBZ50-C3: Date-code verification matters here — if you see parts with recent date codes, treat them as suspect and request provenance documentation.

50 MHz Cortex-M3 with 64 KB Flash — what it covers

It carries 64 KB of Flash and 12 KB of RAM — a modest memory footprint suited for control-loop firmware, sensor fusion, or protocol bridging where the code base fits under 64 KB and you don't need a large heap. The 12 KB RAM (organized as 12K x 8) is tight for buffered communication stacks; budget carefully if you plan to use multiple UART or SPI channels with large packet queues.

Peripherals and connectivity — what is on-chip

The oscillator is internal, so you can save a crystal on the BOM if the application tolerates the internal accuracy.

108-ball BGA — layout and rework considerations

That is a 108-LFBGA package (10x10 mm).

Surface-mount only.

Frequently asked questions

Is LM3S1N11-IBZ50-C3 obsolete?

Buyers need to know if the part is still in production to decide whether to design it in or source last-time-buy; obsolescence status directly impacts availability and long-term supply.

What is the replacement for LM3S1N11-IBZ50-C3?

If the part is obsolete, engineers and sourcing buyers must find a compatible substitute to avoid redesigns or shortages; providing a direct replacement is critical for continuity.

Where to buy LM3S1N11-IBZ50-C3?

Buyers need to locate authorized distributors with stock or lead times to secure the component; sourcing is a primary need for both prototype and production quantities.

What are the specifications of LM3S1N11-IBZ50-C3?

Design engineers must validate that the part meets their requirements for speed, memory, peripherals, and package; datasheet details are essential for fit assessment.

Is LM3S1N11-IBZ50-C3 compatible with LM3S1N11-IBZ50?

Engineers or technicians may be replacing a similar part and need to verify pin-to-pin compatibility and functionality; a mismatch could cause board failure.