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Texas Instruments LM3S6965-IBZ50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S6965-IBZ50-A2T ARM Cortex-M3 MCU, 50MHz, 256KB Flash

MPNLM3S6965-IBZ50-A2T
Obsolete

TI Stellaris ARM Cortex-M3S 6000 series, LM3S6965-IBZ50-A2T, 32-bit ARM Cortex-M3, 50MHz, 256KB Flash, 64KB RAM, Ethernet MAC, 4ch 10-bit ADC, 42 I/O, 108-LFBGA (10×10mm), -40°C to 85°C, 2.25–2.75V, Tape & Reel.

Texas Instruments LM3S6965-IBZ50-A2T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6965-IBZ50-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)
Speed50MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityEthernet, I²C, IrDA, Microwire, QEI, SPI, SSI, UART/USART
Number of i (O)42
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 4x10b
Program memory size256KB (256K x 8)

Product details

The TI Stellaris LM3S6965-IBZ50-A2T is a 32-bit ARM Cortex-M3 microcontroller running at 50 MHz, with 256 KB of Flash program memory and 64 KB of RAM. It integrates an Ethernet MAC controller, four 10-bit ADC channels, and 42 GPIOs, making it suited for industrial control, building automation, and networked embedded systems that require a compact BGA footprint.

The LM3S6965-IBZ50-A2T is marked Obsolete by the manufacturer. For new designs, TI's TM4C12x series (Cortex-M4F) is the architectural evolution, but it is not pin-compatible.

Package and temperature grade — board-level fit

108-ball LFBGA (10×10 mm) package. -40°C to 85°C temperature range. Supply voltage 2.25 V to 2.75 V. Internal oscillator available.

Frequently asked questions

What is the replacement for LM3S6965-IBZ50-A2T?

There is no official pin-compatible replacement from TI for this specific BGA variant. The TM4C12x series (Cortex-M4F) is the architectural successor but requires a PCB redesign. For existing boards, the part is available via surplus and broker channels.

Does LM3S6965-IBZ50-A2T have Ethernet MAC?

Yes, the LM3S6965-IBZ50-A2T integrates an Ethernet MAC controller, along with I²C, SPI, UART, and other serial interfaces.