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Texas Instruments LM3S5C51-IQC80-A1T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5C51-IQC80-A1T ARM Cortex-M3 MCU, 80 MHz, 512 KB Flash

MPNLM3S5C51-IQC80-A1T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 5000 LM3S5C51-IQC80-A1T, 32-Bit Single-Core MCU, 80MHz, 512KB Flash, 64K x 8 RAM, 100-LQFP, -40°C~85°C.

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

Specifications

LM3S5C51-IQC80-A1T 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
PackageTape & Reel (TR)
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
Case100-LQFP
Data convertersA/D 16x12b
Program memory size512KB (512K x 8)

Product details

The LM3S5C51-IQC80-A1T is a Texas Instruments Stellaris® ARM® Cortex®-M3 MCU from the 5000 series, built around a 32-bit single-core processor running at 80 MHz.

Obsolete — planning the BOM transition

The official record does not list a direct successor order code. Any new project should target a current-production Cortex-M3 or Cortex-M4 part with similar peripheral set and package footprint.

Frequently asked questions

What is the replacement for LM3S5C51-IQC80-A1T?

TI has not published a direct successor order code for this part. Current TI families like TM4C or MSP432 are worth evaluating, but firmware porting and board re-qualification will be required.

Can I use LM3S5C51-IQC80-A1T in a new project?

Not recommended. The part is obsolete, so long-term supply is not guaranteed. For new designs, select a current-production ARM Cortex-M MCU with similar specs to avoid a future redesign cycle.