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Texas Instruments LM3S300-EQN25-C2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S300-EQN25-C2T Stellaris ARM Cortex-M3 MCU, 25 MHz, 16 KB Flash

MPNLM3S300-EQN25-C2T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 300 series LM3S300-EQN25-C2T, 32-bit ARM Cortex-M3 MCU, 25MHz, 16KB Flash, 4K x 8 RAM, 36 I/O, I²C/Microwire/SPI/SSI/UART/USART, 48-LQFP, -40°C to 105°C.

Texas Instruments LM3S300-EQN25-C2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S300-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
ConnectivityI²C, Microwire, SPI, SSI, UART/USART
Number of i (O)36
Core processorARM® Cortex®-M3
Case48-LQFP
Program memory size16KB (16K x 8)

Product details

No last-time-buy window remains open through the factory.

The 25 MHz Cortex-M3 core delivers adequate throughput for UART polling, sensor readout, and PWM generation at moderate update rates. It will not sustain real-time audio processing or high-speed data logging — the 4 KB RAM and 16 KB Flash are the actual constraints. For a control loop with a few hundred lines of C and a handful of state variables, this part fits without over-spending on a larger Stellaris sibling.

The 36 I/O lines are on the perimeter leads.

Frequently asked questions

Is the LM3S300-EQN25-C2T obsolete?

Yes, TI has designated this part as obsolete. It is not available from the factory; all sourcing is through independent distribution with prior authentication.

What are the pin-compatible alternatives to LM3S300-EQN25-C2T?

No official pin-compatible replacement is listed in TI's documentation for this exact order code. The Stellaris family shares the same 48-LQFP footprint across several density options, but pin compatibility should be verified against the target MCU's datasheet before substitution.

What is the operating temperature range of LM3S300-EQN25-C2T?

The device is rated for -40°C to 105°C, covering industrial and automotive cabin-adjacent environments.

Where can I buy LM3S300-EQN25-C2T and how do I get a price?

This part is sourced to order through independent distribution. Submit an RFQ for current availability, pricing, and date-code verification.

What is the difference between LM3S300-EQN25-C2T and LM3S300-EQN25-C2 (non-tape)?

The C2T suffix indicates Tape & Reel packaging; the C2 suffix typically denotes tray or tube. The silicon and electrical ratings are identical.