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Texas Instruments LM3S6420-IQC25-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6420-IQC25-A2 Stellaris ARM Cortex-M3 MCU, 25 MHz

MPNLM3S6420-IQC25-A2
Obsolete

Stellaris® ARM® Cortex®-M3S 6000 series, LM3S6420-IQC25-A2, 32-Bit Single-Core MCU, 25MHz, 96KB (96K x 8) FLASH, 32K x 8 RAM, 100-LQFP, -40°C~85°C.

$14.6200Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6420-IQC25-A2 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~85°C(TA)
Speed25MHz
PackageTray
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)46
Core processorARM® Cortex®-M3
Case100-LQFP
Program memory size96KB (96K x 8)

Product details

The peripheral set includes Ethernet MAC, IrDA, Microwire, SPI, SSI, and multiple UART/USART channels, making it a fit for networked industrial controllers, building automation gateways, and remote terminal units that need wired connectivity without an external PHY in the same package.

The 96 KB program memory is sized for a real-time operating system kernel plus a TCP/IP stack and application logic, leaving room for field-upgradeable firmware. The 32K x 8 SRAM supports moderate data buffering — enough for a few Ethernet frames or a command queue — but designs with large lookup tables or extensive logging will need external memory or careful allocation.

For BOM sustainment, procurement must turn to the independent distribution channel — surplus inventory, broker-sourced stock, or last-time-buy remnants.

Frequently asked questions

What is the replacement for LM3S6420-IQC25-A2?

For a form-fit-function substitute, review the Stellaris family's later Cortex-M3 devices with Ethernet — pin compatibility and peripheral mapping must be verified against the target board's schematic.