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Texas Instruments LM3S5651-IQC80-C3 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5651-IQC80-C3 Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S5651-IQC80-C3
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series, LM3S5651-IQC80-C3, 32-Bit Single-Core MCU, 80MHz, 128KB (128K x 8) FLASH, 32K x 8 RAM, 100-LQFP, -40°C~85°C.

Texas Instruments LM3S5651-IQC80-C3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5651-IQC80-C3 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.08V ~ 1.32V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTray
RAM size32K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG
Number of i (O)67
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x10b
Program memory size128KB (128K x 8)

Product details

80 MHz Cortex-M3 with 128 KB Flash — mid-range control core

The LM3S5651-IQC80-C3: The 100-LQFP package brings out 67 GPIOs and a 16-channel 10-bit ADC, with peripherals including DMA, I²S, PWM, and a QEI for motor feedback.

The internal oscillator and brown-out reset keep the core stable across the range.

Connectivity and peripherals — CAN, USB OTG, I²S, QEI

The I²S port handles digital audio streaming, and the DMA engine offloads data transfers without stalling the core.

The LM3S5651-IQC80-C3 is listed as obsolete.

Frequently asked questions

Is LM3S5651-IQC80-C3 obsolete?

Yes, the LM3S5651-IQC80-C3 is listed as obsolete by Texas Instruments. No official replacement or drop-in successor has been published for this specific order code.