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Texas Instruments LM3S817-EQN50-C2T — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S817-EQN50-C2T ARM Cortex-M3 MCU, 50 MHz, 64 KB Flash

MPNLM3S817-EQN50-C2T
Obsolete

Texas Instruments Stellaris LM3S817-EQN50-C2T ARM Cortex-M3 MCU, 32-bit single-core, 50 MHz, 64 KB Flash, 8 KB RAM, 30 GPIO, 6-channel 10-bit ADC, SPI/SSI/UART, 48-LQFP, -40 to 105°C, 3.3 V nominal.

Texas Instruments LM3S817-EQN50-C2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S817-EQN50-C2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 800
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 3.6V
Operating temperature-40°C~105°C(TA)
Speed50MHz
PackageTape & Reel (TR)
RAM size8K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityMicrowire, SPI, SSI, UART/USART
Number of i (O)30
Core processorARM® Cortex®-M3
Case48-LQFP
Data convertersA/D 6x10b
Program memory size64KB (64K x 8)

Product details

The TI Stellaris LM3S817-EQN50-C2T is a 32-bit ARM Cortex-M3 MCU running at 50 MHz, with 64 KB of Flash program memory and 8 KB of SRAM. It carries 30 GPIO lines and a 6-channel 10-bit ADC, all in a 48-LQFP (7x7 mm) package.

Memory and I/O — sizing the BOM fit

64 KB Flash and 8 KB RAM place this MCU in the small-footprint control tier — enough for a single motor-control algorithm with a Modbus RTU stack, or for a sensor hub aggregating six 10-bit ADC channels over UART. The 30 GPIOs, combined with SPI, SSI, Microwire, and UART connectivity, cover most mixed-signal I/O needs without an external port expander.

Sourcing reality — obsolete part, broker channel

Frequently asked questions

What is the closest pin-compatible alternative to LM3S817-EQN50-C2T?

No official pin-compatible successor is listed in the available records. For a replacement, cross-reference the Stellaris LM3S series within the same 48-LQFP footprint, but verify pinout and peripheral compatibility from the respective datasheets before committing the BOM.

What is LM3S817-EQN50-C2T's listed speed?

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