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Texas Instruments LM3S5951-IBZ80-C3 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5951-IBZ80-C3 Stellaris ARM Cortex-M3 MCU, 80 MHz, 256 KB Flash, Obsolete

MPNLM3S5951-IBZ80-C3
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series LM3S5951-IBZ80-C3, 32-bit single-core MCU, 80 MHz, 256 KB Flash, 64K x 8 RAM, 108-LFBGA, -40°C to 85°C.

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

Specifications

LM3S5951-IBZ80-C3 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.08V ~ 1.32V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTray
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG
Number of i (O)67
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 16x10b
Program memory size256KB (256K x 8)

Product details

80 MHz Cortex-M3 — what the speed buys you

80 MHz on an ARM Cortex-M3 is fast enough to handle a CANbus message queue, run a modest RTOS tick, and service a USB OTG bulk transfer without dropping frames. For control loops that need deterministic response, the 80 MHz clock keeps interrupt latency under a microsecond. If your algorithm fits in 256 KB of Flash and you are not doing heavy DSP, this core is a solid fit.

Connectivity for industrial and automotive gateways

That makes it a natural choice for a CAN-to-USB gateway or a multi-protocol bridge between a factory floor and a PC. The 67 GPIOs give you enough headroom to interface to a small keypad, a character LCD, and a handful of sensors without an external port expander.

Lifecycle reality — obsolete, sourced to order

Package and environment

108-ball LFBGA (10x10 mm body), surface-mount. Operating temperature -40°C to 85°C. Supply voltage 1.08 V to 1.32 V.

Frequently asked questions

Is LM3S5951-IBZ80-C3 obsolete?

Yes, Texas Instruments has designated the LM3S5951-IBZ80-C3 as obsolete. No factory production or last-time-buy window remains. The part is available only through independent distribution, sourced to order against an RFQ.

What is the replacement for LM3S5951-IBZ80-C3?

TI does not list a direct pin-compatible replacement for this specific order code. For new designs, consider the TM4C or Stellaris-series Cortex-M4 parts from TI, but verify pinout and memory configuration against your board. For a drop-in BOM fill, the independent channel remains the only source.

Can LM3S5951-IBZ80-C3 be used for CAN bus applications?

Yes, the LM3S5951-IBZ80-C3 includes a CANbus interface as part of its connectivity set, making it suitable for CAN gateway or node designs in industrial or automotive environments.

Where can I buy LM3S5951-IBZ80-C3?

This obsolete part is not stocked by franchised distributors. We source it to order against an RFQ through our independent supply network. Submit an RFQ for current availability and pricing.

What is LM3S5951-IBZ80-C3's listed speed?

The core runs at 80 MHz, which is the maximum clock for this ARM Cortex-M3 device under the specified supply range.