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Texas Instruments LM3S2637-IQC50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S2637-IQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz, 128 KB Flash

MPNLM3S2637-IQC50-A2T
NRND

Texas Instruments Stellaris® ARM® Cortex®-M3S 2000 series 32-bit MCU, LM3S2637-IQC50-A2T, 50 MHz, 128 KB Flash, 32 KB RAM, 46 I/O, CAN/I²C/SPI/UART, -40 to 85°C, 100-LQFP.

$16.6967Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S2637-IQC50-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 2000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTape & Reel (TR)
RAM size32K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)46
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 4x10b
Program memory size128KB (128K x 8)

Product details

The LM3S2637-IQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from TI's Stellaris series, running at 50 MHz with 128 KB of Flash and 32 KB of RAM.

If the application needs over-the-air updates or a larger protocol stack (e.g., full EtherCAT slave), the Flash budget gets tight — the designer should budget for external SPI Flash or step up to a higher-density sibling. The 32 KB RAM includes the stack and data buffers; a heavy frame buffer or large lookup table will require external SRAM.

Lifecycle reality: NRND

For an existing BOM line, the part remains available through independent distribution — we source and quote it to order against an RFQ.

Frequently asked questions

What is the closest pin-compatible alternative to LM3S2637-IQC50-A2T?

TI's Stellaris family includes several pin-compatible options in the same 100-LQFP package, such as the LM3S2637-IQC50-A2 (tray) or higher-density siblings like the LM3S2965. For a precise cross-reference, check the TI Stellaris selection guide or contact us with your firmware memory requirements.

What is LM3S2637-IQC50-A2T's listed speed?

The core runs at 50 MHz, as listed in the specifications. This is the maximum clock frequency for the ARM Cortex-M3 core on this device.

What series is LM3S2637-IQC50-A2T from?

It belongs to the Stellaris® ARM® Cortex®-M3S 2000 series from Texas Instruments.

What compliance documentation does TI provide for LM3S2637-IQC50-A2T?

TI provides RoHS and REACH compliance declarations. The 100-LQFP package is lead-free per TI's standard transition. No UL or IEC certification is listed for this IC.