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Texas Instruments LM3S5C51-IQC80-A1 — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S5C51-IQC80-A1 ARM Cortex-M3 MCU, 80MHz, 512KB Flash

MPNLM3S5C51-IQC80-A1
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 5000 series LM3S5C51-IQC80-A1, 32-bit ARM Cortex-M3 MCU, 80MHz, 512KB Flash, 64KB RAM, USB OTG/CANbus/I2C/SPI/UART, 67 I/O, 100-LQFP (14x14), -40 to 85°C, 3V to 3.6V supply, Tray.

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

Specifications

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

Product details

80 MHz Cortex-M3 with USB OTG and CAN — what this part was built for

The LM3S5C51-IQC80-A1: The 100-LQFP package with 67 general-purpose I/O and a 16-channel 12-bit ADC gives it the pin count for sensor fusion and actuator control on a single board.

The LM3S5C51-IQC80-A1 is obsolete. TI has ended production of the Stellaris Cortex-M3 line, and no official direct replacement is listed. For BOM lines already qualified to this MCU, the supply path runs through independent distribution and the surplus market.

Memory and peripheral fit — what a replacement must match

Without an official TI successor, the closest functional alternatives are other ARM Cortex-M3 or M4 devices in 100-LQFP with matching USB + CAN — but every candidate requires a firmware port and a board respin if the pinout differs.

Frequently asked questions

Who supplies LM3S5C51-IQC80-A1 and how is it quoted for volume purchases?

Sourced to order through independent distribution against an RFQ. Availability and volume pricing are confirmed at quote time — no live inventory or published per-unit price appears in this ledger.

What is LM3S5C51-IQC80-A1's listed speed?

The listed speed is 80MHz, driven by the ARM Cortex-M3 core with a single-cycle multiplier and hardware divide.

What series does the LM3S5C51-IQC80-A1 belong to?

The listed series is Stellaris ARM Cortex-M3S 5000 — part of TI's pre-acquisition Stellaris MCU family that became the foundation of the Tiva C Series.