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Texas Instruments LM3S5B91-IBZ80-C3 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5B91-IBZ80-C3 Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S5B91-IBZ80-C3
Obsolete

Stellaris LM3S5B91-IBZ80-C3: 32-bit ARM Cortex-M3 single-core at 80 MHz, 256 KB Flash, 96 KB SRAM, 1.08–1.32 V supply, USB OTG/CAN/LIN/SPI/UART, 72 I/O, 108-LFBGA, –40 to 85°C.

Texas Instruments LM3S5B91-IBZ80-C3 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5B91-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 size96K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, EBI/EMI, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG
Number of i (O)72
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 16x10b
Program memory size256KB (256K x 8)

Product details

80 MHz Cortex-M3 with USB OTG and CAN — industrial gateway MCU

The LM3S5B91-IBZ80-C3: The LM3S5B91 is a 32-bit ARM Cortex-M3 MCU clocked at 80 MHz, with 256 KB Flash and 96 KB SRAM. The 1.08–1.32 V core supply keeps dynamic power moderate for a 32-bit part at this speed. The peripheral set includes USB OTG, CAN, LIN, and multiple serial interfaces. The EBI/EMI bus allows direct connection to external memory or parallel peripherals. 72 GPIOs and a 16-channel 10-bit ADC round out the I/O.

256 KB Flash and 96 KB SRAM — firmware and data buffer sizing

256 KB Flash and 96 KB SRAM are available for firmware and data buffers.

Frequently asked questions

What is LM3S5B91-IBZ80-C3's listed speed?

The core runs at 80 MHz, which is the maximum clock for this Cortex-M3 device.