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Texas Instruments LM3S5G51-IBZ80-A1 — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S5G51-IBZ80-A1 Stellaris ARM Cortex-M3 MCU, 80 MHz, 384 KB

MPNLM3S5G51-IBZ80-A1
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 series 32-bit MCU, LM3S5G51-IBZ80-A1, 80 MHz core, 384 KB Flash, 64 KB RAM, 67 I/O, CAN, USB OTG, 16-ch 12-bit ADC, -40°C to 85°C, 108-BGA.

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

Specifications

LM3S5G51-IBZ80-A1 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 3.6V
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 16x12b
Program memory size384KB (384K x 8)

Product details

It runs at 80 MHz with 384 KB Flash and 64 KB SRAM. The 67 general-purpose I/O and the internal oscillator reduce external component count. It operates over the industrial temperature range of -40°C to 85°C on a 3.0 V to 3.6 V supply, and is housed in a 108-ball BGA (10x10 mm) package — a footprint suited for compact, surface-mount designs where board area is at a premium.

At 80 MHz, the ARM Cortex-M3 core delivers 80 MHz clock speed. The 64 KB SRAM limits buffering.

Obsolete — sourcing reality for the LM3S5G51-IBZ80-A1

Texas Instruments has marked the LM3S5G51-IBZ80-A1 as obsolete. No official successor order code is listed. Procurement moves to the independent surplus and broker market.

Frequently asked questions

What is the replacement for LM3S5G51-IBZ80-A1?

No official replacement order code is listed for the LM3S5G51-IBZ80-A1. There is no pin-compatible drop-in from TI. A replacement would require selecting a current-generation MCU (such as a TI Tiva-C series or an STM32F4) and migrating the design — pinout, peripheral mapping, and software will all need rework.

Where can I buy the LM3S5G51-IBZ80-A1?

The LM3S5G51-IBZ80-A1 is sourced and quoted to order against an RFQ through our independent distribution network. Availability and current pricing are confirmed at quote time. Submit an RFQ for a real-time sourcing posture on this obsolete part.

What are the key specifications of the LM3S5G51-IBZ80-A1?

The LM3S5G51-IBZ80-A1 is a 32-bit ARM Cortex-M3 MCU running at 80 MHz, with 384 KB Flash and 64 KB SRAM. It features 67 I/O, a 16-channel 12-bit ADC, CAN, USB OTG, and multiple serial interfaces (UART, SPI, I²C). It operates from -40°C to 85°C on a 3.0 V to 3.6 V supply in a 108-ball BGA package.