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Texas Instruments LM3S6422-EQC25-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6422-EQC25-A2T Stellaris ARM Cortex-M3 MCU, 25MHz

MPNLM3S6422-EQC25-A2T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 6000 series MCU, LM3S6422-EQC25-A2T, 25MHz, 96KB Flash, 32KB RAM, 34 I/O, Ethernet MAC, SPI/SSI/UART, 2.25–2.75V, -40 to 105°C, 100-LQFP (14×14mm), Tape & Reel.

Texas Instruments LM3S6422-EQC25-A2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6422-EQC25-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 6000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~105°C(TA)
Speed25MHz
PackageTape & Reel (TR)
RAM size32K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityEthernet, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)34
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 2x10b
Program memory size96KB (96K x 8)

Product details

96 KB Flash / 32 KB RAM — memory headroom for a TCP/IP stack

The 96 KB program Flash and 32 KB data SRAM are sized for a lightweight embedded TCP/IP stack (like lwIP) plus a real-time control loop.

No last-time-buy window remains open through the factory channel, so new-production builds must either source from the independent surplus market or migrate to a replacement. The Stellaris family was TI's Cortex-M3 line that later folded into the Tiva C Series; a functional migration path exists, but it requires a firmware port and a board respin — there is no drop-in pin-compatible successor from TI.

Frequently asked questions

Is LM3S6422-EQC25-A2T obsolete?

Yes, Texas Instruments has classified this MCU as obsolete. No factory production or last-time-buy is active, so procurement relies on the surplus and broker channel.

Does LM3S6422-EQC25-A2T have an Ethernet MAC?

Yes, it integrates a dedicated Ethernet MAC controller as one of its connectivity peripherals, alongside IrDA, Microwire, SPI, SSI, and UART/USART interfaces.