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Texas Instruments LM3S317-EQN25-C2T — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S317-EQN25-C2T MCU, 25MHz, 48-LQFP

MPNLM3S317-EQN25-C2T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 300 series MCU, LM3S317-EQN25-C2T, 32-bit Single-Core, 25MHz, 16KB FLASH, 4K x 8 RAM, 30 I/O, 48-LQFP, -40°C~105°C.

Texas Instruments LM3S317-EQN25-C2T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S317-EQN25-C2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 300
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 3.6V
Operating temperature-40°C~105°C(TA)
Speed25MHz
PackageTape & Reel (TR)
RAM size4K 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 size16KB (16K x 8)

Product details

The Texas Instruments LM3S317-EQN25-C2T is a 32-bit ARM Cortex-M3 MCU from the Stellaris series, running at 25 MHz with 16 KB of Flash and 4 KB of RAM. Typical applications include motor-control nodes, sensor bridges, and serial-communication modules where a small-footprint Cortex-M3 core is sufficient.

The 25 MHz Cortex-M3 executes single-cycle multiply and hardware divide. The 6-channel 10-bit ADC is adequate for most sensor interfaces.

16 KB Flash / 4 KB RAM — firmware budget

The 16 KB Flash and 4 KB RAM support a control firmware image and a UART buffer.

Texas Instruments has marked the LM3S317-EQN25-C2T as obsolete. No factory last-time-buy window remains open.

The 48-LQFP package measures 7 mm × 7 mm. It is a surface-mount part with 30 I/O lines.

Frequently asked questions

What is the closest pin-compatible alternative to LM3S317-EQN25-C2T?

No official pin-compatible replacement has been published by Texas Instruments for this specific order code. Other Stellaris 48-LQFP devices with larger Flash or higher speed share the same footprint, but a firmware and peripheral review is required before substitution.

What is the operating temperature range of LM3S317-EQN25-C2T?

The part is rated for -40°C to 105°C, making it suitable for industrial and automotive under-hood environments.