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Texas Instruments LM3S1N11-IBZ50-C5T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1N11-IBZ50-C5T Stellaris ARM Cortex-M3 MCU, 50MHz

MPNLM3S1N11-IBZ50-C5T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series, LM3S1N11-IBZ50-C5T, 32-bit single-core MCU, 50MHz, 64KB FLASH, 12KB SRAM, 67 I/O, 108-LFBGA, -40 to 85°C, 1.08 to 3.6V supply, Tape & Reel.

Texas Instruments LM3S1N11-IBZ50-C5T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1N11-IBZ50-C5T 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
PackageTape & Reel (TR)
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

Memory budget and peripheral set — what the 64 KB / 12 KB split means for firmware

64 KB of Flash (64K x 8) and 12 KB of SRAM (12K x 8) is a balanced mid-range memory footprint. The 12 KB SRAM leaves room for a few hundred bytes of stack per task plus a moderate data buffer — tight if you are doing full-frame Ethernet buffering or large FFTs, but comfortable for UART-to-CAN gateway or PWM motor-control loops.

108-BGA (10x10 mm) — layout and rework considerations

The 108-LFBGA package (10x10 mm ball array) is a space-saver compared to a QFP of similar I/O count, but it demands a multi-layer PCB with via-in-pad or microvia routing to escape the inner rows. The Tape & Reel shipping format is standard for pick-and-place; the MSL level should be verified on the reel label before reflow.

Frequently asked questions

What is the replacement for LM3S1N11-IBZ50-C5T?

No official replacement order code is published by Texas Instruments for this part. The Stellaris ARM Cortex-M3S 1000 series is discontinued. A migration to a current-production Cortex-M3 or Cortex-M4 MCU with similar peripheral count and a 108-ball BGA footprint would be the practical path, but that requires a PCB redesign and firmware port. For now, the LM3S1N11-IBZ50-C5T is sourced as a surplus component against an RFQ.

Where can I buy LM3S1N11-IBZ50-C5T?

Submit an RFQ through this listing for a real-time sourcing check.