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Texas Instruments LM3S1150-IQC50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1150-IQC50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz

MPNLM3S1150-IQC50-A2
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 1000 series LM3S1150-IQC50-A2, 32-Bit Single-Core MCU, 50MHz, 64KB (64K x 8) FLASH, 16K x 8 RAM, 52 I/O, 2.25V~2.75V, -40°C~85°C, 100-LQFP.

$30.1106Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1150-IQC50-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
Speed50MHz
PackageTray
RAM size16K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityI²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)52
Core processorARM® Cortex®-M3
Case100-LQFP
Program memory size64KB (64K x 8)

Product details

50 MHz Cortex-M3 with 64 KB Flash — what the specs mean for your BOM

It carries 64 KB of on-chip Flash for program storage and 16K x 8 of SRAM for data — a memory footprint sized for moderate control firmware, sensor fusion, or motor-control loops without external memory.

Obsolete — plan your last-time-buy or cross-reference now

No further factory orders will be accepted; the only channel left is independent distribution — surplus stock, new-old-stock reels, or broker-sourced units. The Stellaris family was TI's early Cortex-M3 line, and TI's current portfolio has moved to the TM4C series, but those are not pin-compatible — expect a board respin if you migrate.

Frequently asked questions

Where can I buy LM3S1150-IQC50-A2?

LM3S1150-IQC50-A2 is obsolete from the factory, but we source it through independent distribution — new-old-stock and surplus inventory. Submit an RFQ; we confirm availability and current pricing at quote time. No stock or price figures are published because the supply is variable.

Is LM3S1150-IQC50-A2 obsolete?

No further factory orders are accepted. Procurement must go through surplus or broker channels.

What is the replacement for LM3S1150-IQC50-A2?

TI does not list a direct pin-compatible replacement for the LM3S1150-IQC50-A2 within the Stellaris family. The TM4C series is the architectural successor but requires a board layout change. For a like-for-like swap, the closest sibling is the LM3S1165 (same package, more Flash), but that part is also obsolete. A migration to a current TI Cortex-M4F (TM4C123 or TM4C129) or an STM32F103 is common, but neither is pin-compatible — expect a hardware and firmware redesign.

What is the difference between LM3S1150 and LM3S1165?

The LM3S1165 carries more program memory — 128 KB Flash versus 64 KB on the LM3S1150 — and adds a USB 2.0 full-speed device/host/OTG interface. Both share the same 100-LQFP package, 50 MHz Cortex-M3 core, and 16K x 8 SRAM. The LM3S1165 is also obsolete.