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Texas Instruments LM3S1P51-IQC80-C5 — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S1P51-IQC80-C5 ARM Cortex-M3 MCU

MPNLM3S1P51-IQC80-C5
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series LM3S1P51-IQC80-C5, 32-bit ARM Cortex-M3 MCU, 80MHz, 64KB Flash, 24KB RAM, 67 GPIO, 100-LQFP tray, 1.08V–3.6V supply, -40°C to 85°C.

Texas Instruments LM3S1P51-IQC80-C5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1P51-IQC80-C5 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)
Speed80MHz
PackageTray
RAM size24K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityI²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)67
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x10b
Program memory size64KB (64K x 8)

Product details

Existing BOM lines must source through surplus or broker channels.

80 MHz ARM Cortex-M3 with 64 KB Flash and 24 KB RAM

This Stellaris MCU runs an ARM Cortex-M3 core at 80 MHz — enough throughput for motor-control loops, industrial protocol stacks, or sensor fusion. The 64 KB Flash (64K x 8) holds moderate firmware images; the 24 KB SRAM (24K x 8) supports buffered UART or I²C data without external RAM.

Peripherals and connectivity for industrial control

100-LQFP footprint and temperature grade

Housed in a 100-LQFP (14x14 mm) surface-mount package, the MCU offers 67 GPIO lines for board-level interfacing. Mounting is standard surface-mount reflow; no exposed thermal pad, so heat dissipation relies on the package body and board copper.

Frequently asked questions

What is the closest pin-compatible alternative to LM3S1P51-IQC80-C5?

Texas Instruments does not list a direct pin-compatible successor for this obsolete part. The Stellaris and TM4C families share the ARM Cortex-M4 core and similar peripheral sets, but pin compatibility varies by package and feature set. Verify footprint and firmware migration before substituting.