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Texas Instruments LM3S8538-IBZ50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S8538-IBZ50-A2 ARM Cortex-M3 MCU, 50 MHz, 96 KB Flash, 64 K

MPNLM3S8538-IBZ50-A2
Obsolete

Texas Instruments Stellaris LM3S8538-IBZ50-A2, ARM Cortex-M3 32-bit single-core MCU at 50 MHz, 96 KB Flash, 64 KB RAM, 108-LFBGA, Ethernet + CAN + I²C + SPI + UART, 8×10-bit ADC, -40°C to 85°C, 2.25 V to 2.75 V supply.

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

Specifications

LM3S8538-IBZ50-A2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 8000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~85°C(TA)
Speed50MHz
PackageTray
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)36
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 8x10b
Program memory size96KB (96K x 8)

Product details

What this Stellaris MCU brings to an industrial Ethernet node

Obsolete — sourcing reality for the BOM line

Texas Instruments has marked the LM3S8538-IBZ50-A2 as obsolete. No last-time-buy window remains open through the factory; the only supply channel is the independent surplus and broker market. If you are freezing a BOM for a new design, look for a current-production Cortex-M3 or Cortex-M4 with Ethernet and CAN — the Stellaris family has been superseded by TI's Tiva C Series, though pin-compatibility is not guaranteed without a layout review.

Frequently asked questions

What is the replacement for LM3S8538-IBZ50-A2?

Texas Instruments does not list a direct pin-compatible replacement for the LM3S8538-IBZ50-A2. The Tiva C Series (e.g., TM4C123 or TM4C129 parts) offers similar Ethernet + CAN functionality on a Cortex-M4 core, but the package and pinout differ — a PCB layout change is required.

What is the pinout of LM3S8538-IBZ50-A2?

The LM3S8538-IBZ50-A2 is supplied in a 108-ball LFBGA package (10×10 mm). The pinout is documented in the Texas Instruments datasheet for the LM3S8538; the -IBZ50-A2 suffix indicates the specific temperature range and packaging variant, but the ball assignment is identical across the IBZ50 ordering code.

Is LM3S8538-IBZ50-A2 compatible with LM3S8538-IBZ50?

The LM3S8538-IBZ50-A2 and LM3S8538-IBZ50 share the same base die and package; the -A2 suffix typically denotes a later silicon revision or a specific test program. Functionally they are interchangeable in the same socket, but verify the revision-specific errata in the respective datasheets before committing a BOM line.