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Texas Instruments LM3S9997-IQC80-C1 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S9997-IQC80-C1 Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S9997-IQC80-C1
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 9000 series LM3S9997-IQC80-C1, 32-bit ARM Cortex-M3 MCU, 80 MHz, 256 KB Flash, 64 KB SRAM, Ethernet MAC+PHY, CAN, USB OTG, 100-LQFP, -40°C to 85°C.

Texas Instruments LM3S9997-IQC80-C1 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S9997-IQC80-C1 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 size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, I²S, POR, PWM, WDT
ConnectivityCANbus, Ethernet, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB OTG
Number of i (O)60
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 16x10b
Program memory size256KB (256K x 8)

Product details

80 MHz Cortex-M3 with integrated Ethernet MAC — the networking MCU that got away

The LM3S9997-IQC80-C1: With 60 GPIOs, a 16-channel 10-bit ADC, and peripherals like PWM, QEI, and I²S, this part was designed for industrial control, building automation, and networked sensor hubs where a single chip handles both the control loop and the Ethernet stack.

Stock that surfaces today is typically from inventory buyouts, excess OEM lots, or end-of-life sweep purchases. Date-code provenance and traceability matter here — verify that the parts are genuine TI marked units, not remarked or recycled pulls.

Ethernet MAC + CAN + USB OTG — the connectivity trifecta

The CAN controller supports industrial fieldbus applications, while USB OTG enables dual-role host/device operation for data logging or firmware updates.

Supply voltage and temperature — a narrow core rail

The core supply range is 1.235 V to 1.365 V.

Frequently asked questions

Is LM3S9997-IQC80-C1 obsolete?

Yes, the LM3S9997-IQC80-C1 is officially obsolete. Texas Instruments discontinued the Stellaris 9000 series, and no last-time-buy remains available from the factory. The part is only obtainable through independent surplus and broker channels.

What is the replacement for LM3S9997-IQC80-C1?

TI did not assign a direct pin-compatible replacement within the Stellaris family. For new designs, the closest functional alternatives are from the TI Tiva C Series (e.g., TM4C129x) which offer Cortex-M4 cores with Ethernet MAC+PHY, CAN, and USB OTG, though the pinout and register map differ. A full BOM-level migration is required.

Does LM3S9997-IQC80-C1 have an Ethernet MAC?

Yes, the LM3S9997-IQC80-C1 includes an integrated Ethernet MAC with on-chip PHY, supporting 10/100 Mbps operation. This is one of its key differentiating features.