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Texas Instruments LM3S5749-IQC50-A0 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5749-IQC50-A0 Stellaris ARM Cortex-M3 MCU, 50 MHz

MPNLM3S5749-IQC50-A0
NRND

Texas Instruments Stellaris LM3S5749-IQC50-A0, ARM Cortex-M3 32-bit MCU, 50 MHz, 128 KB Flash, 64 KB RAM, 61 I/O, CAN/I2C/SPI/UART/USB, 8x10b ADC, 100-LQFP, -40 to 85°C, 2.25 to 2.75 V supply, Tray, NRND.

$29.7603Ref. price · indicative, final on quote
Texas Instruments LM3S5749-IQC50-A0 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5749-IQC50-A0 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTray
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART, USB
Number of i (O)61
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 8x10b
Program memory size128KB (128K x 8)

Product details

ARM Cortex-M3 at 50 MHz — the mid-range Stellaris workhorse

Industrial temperature grade and 2.5 V supply rail

Plan the power tree accordingly; a standard 3.3 V system will need an LDO to drop to 2.5 V.

Production has not ceased, but TI is steering new designs toward a successor. The NRND flag means the last-time-buy window is open — if this MCU is on your BOM, securing inventory now avoids a later shortage scramble.

CAN and USB — the connectivity differentiator

The built-in CANbus controller and USB interface set this MCU apart from simpler Stellaris parts that lack these peripherals. For a control node that needs to talk on a CAN bus and also present a USB port for configuration or data logging, the LM3S5749 handles both without external bridge chips. The QEI peripheral is a bonus for motor-speed and position feedback loops in servo or conveyor applications.

Frequently asked questions

Is LM3S5749-IQC50-A0 obsolete or NRND?

It is not fully discontinued, but TI recommends against using it in new product designs. Existing production runs can still be supported through the independent channel.

Does LM3S5749-IQC50-A0 have a built-in CAN controller?

Yes, the LM3S5749 includes a CANbus controller as part of its peripheral set, along with USB, I²C, SPI, UART, and QEI interfaces.

Is LM3S5749-IQC50-A0 pin compatible with other Stellaris parts?

The 100-LQFP package is common across the Stellaris family, and many Stellaris MCUs in the same package share pin compatibility within the series. Confirm the specific pin assignment against your target replacement's datasheet — the peripheral mix (CAN, USB, ADC channels) may shift pin functions between variants.