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Texas Instruments LM3S1R26-IQR80-C3 — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S1R26-IQR80-C3 ARM Cortex-M3 MCU

MPNLM3S1R26-IQR80-C3
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series LM3S1R26-IQR80-C3, 32-bit ARM Cortex-M3 MCU, 80 MHz, 256KB Flash, 48KB RAM, 33 I/O, I²C/SPI/UART/LINbus, 8×10b ADC, 1.08–3.6 V supply, -40 to 85 °C, 64-LQFP tray.

Texas Instruments LM3S1R26-IQR80-C3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1R26-IQR80-C3 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 size48K 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)33
Core processorARM® Cortex®-M3
Case64-LQFP
Data convertersA/D 8x10b
Program memory size256KB (256K x 8)

Product details

80 MHz Cortex-M3 with 256 KB Flash — what it delivers for control and communication tasks

The LM3S1R26-IQR80-C3: It integrates 33 GPIOs, a 8-channel 10-bit ADC, and a peripheral set including I²C, SPI, UART, LINbus, IrDA, and SSI — making it suited for industrial control, sensor interfacing, and networked embedded systems that need a balanced mix of processing and connectivity.

Stock is limited to existing inventory — no further factory production is planned.

64-LQFP package — footprint and layout notes

Housed in a 64-LQFP package measuring 10x10 mm (supplier device package 64-LQFP), this MCU uses a surface-mount footprint with 0.5 mm pitch.

Frequently asked questions

What is the replacement for LM3S1R26-IQR80-C3?

The Stellaris family was phased out; TI's Tiva C Series (Cortex-M4) or other Cortex-M3/M4 MCUs are potential functional replacements, but pin-compatibility is not guaranteed. A full design review is recommended for any substitution.

Where can I buy LM3S1R26-IQR80-C3?

Submit an RFQ to confirm availability and current pricing — stock is limited to existing inventory and confirmed at quote time.