Skip to main content
Log in
Texas Instruments LM3S5791-IBZ80-C1T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5791-IBZ80-C1T Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S5791-IBZ80-C1T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 5000 series 32-bit MCU, LM3S5791-IBZ80-C1T, 80 MHz core, 128 KB Flash, 64K x 8 SRAM, 72 I/O, CAN/USB OTG/EBI/EMI, 108-BGA, -40°C to 85°C.

Texas Instruments LM3S5791-IBZ80-C1T datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S5791-IBZ80-C1T 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
PackageTape & Reel (TR)
RAM size64K 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 size128KB (128K x 8)

Product details

What this Stellaris MCU brings to a BOM

The Texas Instruments LM3S5791-IBZ80-C1T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 5000 series, clocked at 80 MHz with 128 KB of Flash and 64K x 8 of SRAM.

At 80 MHz the Cortex-M3 delivers 80 MHz core speed. The 64K x 8 SRAM buffers USB descriptors and CAN message objects.

Obsolete — sourcing reality for this BOM line

Integration note — 108-BGA on a 10x10 mm grid

The 108-ball BGA (10x10 mm) requires a four-layer PCB for fanout. Core supply is 1.08 V to 1.32 V; I/O rail is separate.

Frequently asked questions

What is LM3S5791-IBZ80-C1T's listed speed?

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