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Texas Instruments LM3S101-IQN20-C2 — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S101-IQN20-C2 ARM Cortex-M3 MCU, 20 MHz

MPNLM3S101-IQN20-C2
NRND

Texas Instruments Stellaris® ARM® Cortex®-M3S 100 microcontroller, LM3S101-IQN20-C2, 32-bit single-core, 20 MHz, 8 KB Flash, 2 KB RAM, 48-LQFP.

$5.4142Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S101-IQN20-C2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 100
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed20MHz
PackageTray
RAM size2K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityMicrowire, SPI, SSI, UART/USART
Number of i (O)18
Core processorARM® Cortex®-M3
Case48-LQFP
Program memory size8KB (8K x 8)

Product details

20 MHz Cortex-M3 with 8 KB Flash — the memory ceiling for control-loop firmware

The LM3S101-IQN20-C2: If your firmware footprint exceeds this, step up to the 32 KB or 64 KB variants in the same family.

On-chip peripherals include brown-out detect, POR, PWM, and a watchdog timer — enough for a standalone motor or valve controller without an external supervisor. Serial connectivity covers Microwire, SPI, SSI, and UART/USART, which handles most sensor and actuator interfaces in a compact panel. There are 18 GPIOs available.

NRND status — what it means for the BOM

Texas Instruments lists the LM3S101-IQN20-C2 as NRND (Not Recommended for New Designs). This means it is still available for existing production but will not be supported for new projects. For BOM lines already using this MCU, independent distribution can supply it against an RFQ.

Frequently asked questions

What is the closest pin-compatible alternative to LM3S101-IQN20-C2?

No official pin-compatible successor is listed by Texas Instruments. Higher-density Stellaris parts in the same 48-LQFP package share the same Cortex-M3 core but have different memory maps and peripheral registers — a firmware port is needed. The closest functional fit is another Stellaris MCU with a larger Flash and RAM footprint, but pin compatibility must be verified against the specific package variant.

Where can I buy LM3S101-IQN20-C2?

This part is sourced through independent distribution. No stock-holding claim is made here.