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Texas Instruments LM3S6432-IBZ50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6432-IBZ50-A2 Stellaris ARM Cortex-M3 MCU, 50MHz

MPNLM3S6432-IBZ50-A2
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 6000 series MCU, LM3S6432-IBZ50-A2, 32-Bit Single-Core 50MHz, 96KB Flash, 32K x 8 RAM, Ethernet/I2C/SPI/UART, 108-LFBGA, -40°C~85°C.

Texas Instruments LM3S6432-IBZ50-A2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6432-IBZ50-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)
Speed50MHz
PackageTray
RAM size32K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityEthernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)43
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 3x10b
Program memory size96KB (96K x 8)

Product details

The LM3S6432-IBZ50-A2: The 108-ball LFBGA (10x10 mm body) demands a multilayer PCB with via-in-pad or microvia routing for the fine-pitch balls.

Peripherals and I/O for control applications

With 43 general-purpose I/O lines, three 10-bit ADC channels, and a PWM unit, this MCU can handle local sensor readout, motor PWM drive, and discrete I/O without an external CPLD. The brown-out detect and POR supervisor reduce external reset-IC cost. The WDT is there for safety-critical loops — enable it early in firmware bring-up to catch runaway code during development.

The LM3S6432-IBZ50-A2 is officially obsolete. No last-time-buy window remains from the manufacturer. If your design can tolerate a pin-compatible migration, the Stellaris family includes other Cortex-M3 variants in the same 108-BGA footprint; verify the exact memory and peripheral set against your firmware image.

Frequently asked questions

Is LM3S6432-IBZ50-A2 obsolete?

Yes, the LM3S6432-IBZ50-A2 is officially obsolete. No manufacturer last-time-buy is available; supply is limited to surplus and broker-channel inventory.

What is the replacement for LM3S6432-IBZ50-A2?

No official replacement order code is listed by Texas Instruments. The Stellaris family includes other Cortex-M3 MCUs in the same 108-BGA package — a pin-compatible migration may be possible, but the exact Flash, RAM, and peripheral set must be verified against the firmware and BOM.