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Texas Instruments LM3S1W16-IQR50-C0 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S1W16-IQR50-C0 Stellaris ARM Cortex-M3 MCU, 50 MHz

MPNLM3S1W16-IQR50-C0
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 1000 series, 32-bit single-core MCU, LM3S1W16-IQR50-C0, 50 MHz, 32 KB Flash, 8 KB RAM, 64-LQFP, -40°C to 85°C, 33 I/O.

Texas Instruments LM3S1W16-IQR50-C0 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1W16-IQR50-C0 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.08V ~ 1.32V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTray
RAM size8K 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 size32KB (32K x 8)

Product details

50 MHz Cortex-M3 with 32 KB Flash — what it covers

The LM3S1W16-IQR50-C0: It is built for real-time embedded control where a moderate code footprint and deterministic interrupt response matter — think motor-drive commutation loops, sensor fusion on a CAN bus, or a protocol gateway bridging UART and SPI.

The core supply range is 1.08 V to 1.32 V, separate from the I/O bank. The internal oscillator is used for timing.

The LM3S1W16-IQR50-C0 is obsolete. Expect to work with a broker or surplus channel for last-time-buy or spot quantities.

Peripherals and data conversion

The device includes an 8-channel 10-bit ADC, brown-out detect, POR, a PWM module, a watchdog timer, and a DMA controller. The DMA can move data between the ADC result registers and RAM without CPU intervention, which frees the core for control-law math. The PWM outputs are useful for driving a three-phase inverter or a DC-DC converter stage directly, though you will need external gate drivers for power FETs.

Frequently asked questions

Is LM3S1W16-IQR50-C0 obsolete and what is its replacement?

Yes, the LM3S1W16-IQR50-C0 is obsolete. TI has not published a direct pin-compatible replacement. For new designs, evaluate TI's current Cortex-M3 or M4 families (e.g., Tiva-C or SimpleLink) — expect a different footprint and peripheral set. For existing BOMs, the part is available through surplus and broker channels.

What is the equivalent of LM3S1W16-IQR50-C0?

No official pin-compatible equivalent is listed. The closest functional match within the same Stellaris family would be a higher-density sibling (e.g., with 64 KB or 128 KB Flash) in the same 64-LQFP package, but verify pin compatibility per the specific order code. For a drop-in replacement, you will need to cross-reference the full datasheet and may require a board spin.