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Texas Instruments LM3S1138-IBZ50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1138-IBZ50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash

MPNLM3S1138-IBZ50-A2T
Obsolete

LM3S1138-IBZ50-A2T, Stellaris ARM Cortex-M3S 1000 series, 32-bit ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash, 16K x 8 RAM, 46 I/O, 8x10-bit ADC, I²C/SPI/UART/USART, 108-LFBGA, -40°C to 85°C.

$18.6431Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1138-IBZ50-A2T 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
PackageTape & Reel (TR)
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)46
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 8x10b
Program memory size64KB (64K x 8)

Product details

The LM3S1138-IBZ50-A2T is a 32-bit ARM Cortex-M3 microcontroller from TI's Stellaris series, built on the Cortex-M3S 1000 core architecture. It is suited for embedded control applications such as motor drives, industrial sensors, and human-machine interfaces where a balanced mix of processing throughput and peripheral integration is needed without the overhead of an external memory bus.

The 50 MHz Cortex-M3 runs at 50 MHz. The 64 KB Flash and 16K x 8 RAM support embedded control tasks.

The 108-ball BGA (10x10 mm) requires controlled reflow and X-ray inspection.

Frequently asked questions

Can LM3S1138-IBZ50-A2T be replaced by LM3S1138-IBZ50-A2 without the T suffix?

The LM3S1138-IBZ50-A2 is the same silicon as the -A2T, differing only in packaging format (Tray vs Tape & Reel). It is also obsolete and not a production-ready replacement. For a BOM freeze, verify the A2 variant's date-code availability through the same surplus channel.

What is LM3S1138-IBZ50-A2T's listed speed?

The listed core speed is 50 MHz, based on the ARM Cortex-M3 processor.