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Texas Instruments LM3S9DN5-IQC80-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S9DN5-IQC80-A2 Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S9DN5-IQC80-A2
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 9000 series MCU, LM3S9DN5-IQC80-A2, 32-bit single-core at 80 MHz, 512 KB Flash, 96 KB RAM, 100-LQFP, -40 to 85 °C.

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

Specifications

LM3S9DN5-IQC80-A2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 9000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.235V ~ 1.365V
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, Ethernet, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG
Number of i (O)72
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x12b
Program memory size512KB (512K x 8)

Product details

The LM3S9DN5-IQC80-A2 is a 32-bit ARM Cortex-M3 MCU from the Stellaris 9000 series, clocked at 80 MHz. It has 512 KB of Flash and 96 KB of RAM, with Ethernet, USB OTG, CAN, and multiple serial interfaces.

80 MHz on a Cortex-M3 provides 80 MIPS of single-cycle throughput. This supports a Modbus TCP stack alongside a PID loop at a few kilohertz.

512 KB Flash and 96 KB RAM — sizing the firmware

512 KB of program Flash is generous for a mid-range MCU — it holds a full TCP/IP stack, a USB device stack, and application code without external memory. The 96 KB SRAM handles packet buffers and runtime data; if your application uses Ethernet jumbo frames or large lookup tables, watch the RAM budget.

Frequently asked questions

What is LM3S9DN5-IQC80-A2's listed speed?

The core runs at 80 MHz, which is the maximum clock for this Cortex-M3 variant in the Stellaris 9000 series.