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Texas Instruments LM3S308-IGZ25-C2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S308-IGZ25-C2T Stellaris ARM Cortex-M3 MCU, 25 MHz

MPNLM3S308-IGZ25-C2T
End of Life

Texas Instruments Stellaris® ARM® Cortex®-M3S 300 series MCU, LM3S308-IGZ25-C2T, 32-Bit Single-Core, 25MHz, 16KB (16K x 8) FLASH, 4K x 8 RAM, 28 I/O, 48-VFQFN Exposed Pad, -40°C~85°C.

Texas Instruments LM3S308-IGZ25-C2T datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LM3S308-IGZ25-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~85°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)28
Core processorARM® Cortex®-M3
Case48-VFQFN Exposed Pad
Data convertersA/D 8x10b
Program memory size16KB (16K x 8)

Product details

What this Cortex-M3 does on a control board

The 28 I/O lines, plus I²C, SPI, UART, and SSI interfaces, let it talk to ADCs, displays, or motor drivers without an external bridge chip. An internal oscillator and a brown-out detect / POR / WDT peripheral set mean it can run standalone in an industrial enclosure with minimal support components.

28 I/O and the 48-VQFN footprint

The 48-VFQFN with exposed pad (7x7 mm body) is the package you see on a lot of compact motor-drive and PLC-I/O cards. Tape & Reel delivery means it feeds straight into a pick-and-place for volume builds.

On-site swap reality

If you are carrying a field kit and need to swap this on a customer's panel, the 48-VQFN is not socket-friendly — you will need hot air or a rework station to get the exposed pad off the board. No ESD bench? Ground yourself to the enclosure before handling.

Frequently asked questions

What is the core speed of LM3S308-IGZ25-C2T?

The core runs at 25 MHz, which is the maximum clock from the internal oscillator or an external crystal. At this speed, the Flash requires zero wait states for single-cycle access, so interrupt latency stays predictable for control loops.

How many I/O pins does LM3S308-IGZ25-C2T have?

It has 28 general-purpose I/O pins. Some are shared with the peripheral functions (I²C, SPI, UART, SSI), so check the pin mux table in the datasheet if you need all 28 as GPIO.

What is the RAM size of LM3S308-IGZ25-C2T?

The SRAM is 4 KB organized as 4K x 8 bits.