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Texas Instruments LM3S6420-IBZ25-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6420-IBZ25-A2T ARM Cortex-M3 MCU, 25 MHz, 96KB Flash

MPNLM3S6420-IBZ25-A2T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 6000 series LM3S6420-IBZ25-A2T, 32-Bit Single-Core MCU, 25MHz, 96KB Flash, 32K x 8 RAM, Ethernet, 46 I/O, 108-LFBGA, -40°C~85°C.

Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6420-IBZ25-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~85°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)46
Core processorARM® Cortex®-M3
Case108-LFBGA
Program memory size96KB (96K x 8)

Product details

Texas Instruments has officially marked the LM3S6420-IBZ25-A2T as Obsolete. For a production BOM that carries this order code, the only channel is independent distribution — surplus, new-old-stock, or broker-sourced inventory.

25 MHz Cortex-M3 with Ethernet — the fit decision

With 46 GPIOs in a 108-ball BGA (10x10 mm), it was designed for industrial or building-automation controllers that needed a single-chip Ethernet node.

Peripherals and memory — what the 96 KB Flash covers

The internal oscillator reduces external BOM count, though the Ethernet PHY still needs an external 25 MHz crystal or oscillator for timing.

Frequently asked questions

Does LM3S6420-IBZ25-A2T have Ethernet?

Yes, the LM3S6420-IBZ25-A2T includes an Ethernet interface as part of its connectivity set, alongside IrDA, Microwire, SPI, SSI, and UART/USART.

What is the replacement for LM3S6420-IBZ25-A2T?

Texas Instruments has not published an official direct replacement for the LM3S6420-IBZ25-A2T. The Stellaris 6000 series is a mature portfolio; a pin-compatible second source is not listed in the available documentation. For a production BOM, the only option is sourcing the exact order code through independent distribution.