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Texas Instruments LM3S1637-IQC50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S1637-IQC50-A2T ARM Cortex-M3 MCU, 50 MHz

MPNLM3S1637-IQC50-A2T
NRND

Texas Instruments Stellaris ARM Cortex-M3S 1000 series MCU, LM3S1637-IQC50-A2T, 32-bit single-core at 50 MHz, 128 KB Flash, 32 KB RAM, 43 I/O, 100-LQFP, -40°C to 85°C, 2.25 V to 2.75 V supply.

$16.4174Ref. price · indicative, final on quote
Texas Instruments LM3S1637-IQC50-A2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S1637-IQC50-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 1000
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
ConnectivityI²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)43
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 4x10b
Program memory size128KB (128K x 8)

Product details

The LM3S1637-IQC50-A2T: This is a mid-density, mid-speed MCU suited for motor control, sensor interfacing, and industrial protocol bridging where the Cortex-M3 core handles control loops and protocol stacks without an external processor.

This means TI is no longer actively promoting this part for new projects, though existing production runs and legacy support may continue. For a buyer filling a BOM line on an active product, the NRND flag is a signal to evaluate a replacement before the part enters end-of-life.

The internal oscillator is available, but for precision timing over temperature an external crystal or oscillator is recommended.

Frequently asked questions

Is LM3S1637-IQC50-A2T obsolete?

TI has not issued a last-time-buy notice, but the NRND status means new designs should not use this part. Existing production can continue while supply lasts, but a replacement should be qualified.