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Texas Instruments LM3S3634-IQR50-A0T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S3634-IQR50-A0T Stellaris ARM Cortex-M3 MCU, 50 MHz, 128 KB Flash

MPNLM3S3634-IQR50-A0T
NRND

Texas Instruments Stellaris® ARM® Cortex®-M3S 3000 series MCU, LM3S3634-IQR50-A0T, 32-bit single-core at 50 MHz, 128 KB Flash, 32 KB RAM, 33 I/O, 8x10b ADC, USB/UART/SPI/I2C, -40 to 85°C, 64-LQFP.

$9.9203Ref. price · indicative, final on quote
Texas Instruments LM3S3634-IQR50-A0T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S3634-IQR50-A0T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 3000
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, DMA, POR, PWM, WDT
ConnectivityI2C, IrDA, Microwire, SPI, SSI, UART/USART, USB
Number of i (O)33
Core processorARM® Cortex®-M3
Case64-LQFP
Data convertersA/D 8x10b
Program memory size128KB (128K x 8)

Product details

The LM3S3634-IQR50-A0T is a Texas Instruments Stellaris ARM Cortex-M3 MCU running at 50 MHz with 128 KB of Flash and 32 KB of RAM. The peripheral set includes USB, UART, SPI, I2C, SSI, and IrDA connectivity, plus an 8-channel 10-bit ADC, PWM, DMA, and a watchdog timer. Typical applications include industrial control panels, sensor hubs, and human-machine interface front-ends where a mid-range Cortex-M3 balances throughput and power budget.

NRND — what that means for procurement

If you are starting a new design, review the Stellaris family for a current-production pin-compatible option; the base product number LM3S3634 shares the same footprint across density variants.

128 KB Flash / 32 KB RAM — firmware fit

Frequently asked questions

What is the closest pin-compatible alternative to LM3S3634-IQR50-A0T?

Within the Stellaris LM3S3634 base product number, density variants with larger Flash or RAM share the same 64-LQFP footprint and pinout. For a current-production recommendation, contact us with your target memory and peripheral requirements — we can match you to a suitable Stellaris or Cortex-M4 alternative from the TI portfolio.

What is LM3S3634-IQR50-A0T's listed speed?

The core runs at 50 MHz, which is the maximum clock frequency for this Cortex-M3 device.

What compliance documentation does this brand provide for LM3S3634-IQR50-A0T?

Texas Instruments provides RoHS and REACH compliance documentation for this part. The 64-LQFP package is lead-free and RoHS-compliant per the standard TI material declaration. We can supply the manufacturer's compliance certificate with your order.