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Texas Instruments LM3S8938-IQC50 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S8938-IQC50 Stellaris ARM Cortex-M3 MCU, 50 MHz, 256 KB Flash

MPNLM3S8938-IQC50
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 8000 series MCU, LM3S8938-IQC50, 32-bit single-core, 50 MHz, 256 KB Flash, 64K x 8 RAM, 38 I/O, CANbus, Ethernet, I2C, SPI, UART, 8x10-bit ADC, -40 to 85°C, 100-LQFP (14x14).

Texas Instruments LM3S8938-IQC50 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S8938-IQC50 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 8000
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, POR, PWM, WDT
ConnectivityCANbus, Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)38
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 8x10b
Program memory size256KB (256K x 8)

Product details

It runs at 50 MHz with 256 KB of Flash and 64K x 8 of RAM, and packs a rich peripheral set including CAN, Ethernet, multiple serial interfaces (I2C, SPI, SSI, UART), and an 8-channel 10-bit ADC. The industrial temperature range (-40 to 85°C) suits it for factory automation, motor control, and building-management gateways where a single chip handles both control and Ethernet connectivity.

Connectivity set — CAN and Ethernet on one die

CAN and Ethernet integration allows a single MCU to bridge a CAN-based machine network to a plant Ethernet backbone without an external gateway chip. The 38 GPIOs leave enough headroom for local I/O and display control alongside the two network interfaces.

Package and supply voltage

The 100-LQFP (14x14 mm) package is surface-mount and suitable for reflow assembly. The core and I/O operate from a single 2.25 V to 2.75 V supply.

Frequently asked questions

What is the closest pin-compatible alternative to LM3S8938-IQC50?

No official pin-compatible successor is listed in the lifecycle record. A Stellaris-family MCU with similar peripheral set and package should be evaluated for replacement; the LM3S8000 series includes several 100-LQFP variants that may drop in with firmware changes.

What is LM3S8938-IQC50's listed speed?

The core runs at 50 MHz, delivering roughly 62.5 DMIPS from the ARM Cortex-M3 pipeline.

What compliance documentation is available for LM3S8938-IQC50?

The part carries RoHS compliance as standard for TI's Stellaris series; specific REACH and UL documentation should be requested at quote time.