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Texas Instruments LM3S1D21-IQC80-A1T — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S1D21-IQC80-A1T Stellaris ARM Cortex-M3 MCU, 80MHz, 512KB Flash

MPNLM3S1D21-IQC80-A1T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series 32-bit MCU, LM3S1D21-IQC80-A1T, 80MHz, 512KB Flash, 96K x 8 RAM, 67 I/O, 100-LQFP, -40°C to 85°C, Tape & Reel.

$7.8700Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1D21-IQC80-A1T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.235V ~ 1.365V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size96K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityEBI/EMI, I²C, IrDA, LINbus, Microwire, SPI, SSI, UART/USART
Number of i (O)67
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 8x12b
Program memory size512KB (512K x 8)

Product details

The Texas Instruments LM3S1D21-IQC80-A1T is a 32-bit ARM Cortex-M3 MCU from the Stellaris series, running at 80 MHz. It packs 512 KB of Flash program memory and 96K x 8 of RAM, with 67 general-purpose I/O lines. The part is housed in a 100-LQFP package (14x14 mm) and rated for industrial temperature from -40°C to 85°C. Typical applications include industrial control, motor drives, building automation, and sensor hubs where a mid-range Cortex-M3 core with rich connectivity is needed.

The 1.235 V to 1.365 V core supply requires a dedicated rail.

This part is obsolete per the manufacturer. No direct pin-compatible replacement is listed in the evidence.

Frequently asked questions

What is LM3S1D21-IQC80-A1T's listed speed?

The core runs at 80 MHz.

What is LM3S1D21-IQC80-A1T's listed series?

It belongs to the Stellaris ARM Cortex-M3S 1000 series.