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Texas Instruments LM3S9997-IQC80-C5 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S9997-IQC80-C5 Stellaris ARM Cortex-M3 MCU, 80 MHz

MPNLM3S9997-IQC80-C5
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 9000 series LM3S9997-IQC80-C5, 32-Bit Single-Core MCU, 80MHz, 256KB Flash, 64K x 8 RAM, Ethernet, CAN, USB OTG, 100-LQFP, -40°C~85°C.

$8.4400Ref. price · indicative, final on quote
Texas Instruments LM3S9997-IQC80-C5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S9997-IQC80-C5 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

Memory and peripheral budget for BOM fit

The LM3S9997-IQC80-C5: The 60 general-purpose I/O pins, 16-channel 10-bit ADC, and dedicated PWM and QEI peripherals support sensor feedback and motor-control loops directly. The internal oscillator reduces external BOM count, though the core supply requires a regulated 1.235 V to 1.365 V rail, separate from the I/O voltage.

For production or repair requirements, procurement must rely on surplus inventory or broker channels.

The 1.235 V to 1.365 V core supply demands a clean low-noise rail; a local LDO or switching regulator with low ripple is recommended.

Frequently asked questions

Is LM3S9997-IQC80-C5 obsolete and what is its recommended replacement?

Yes, the LM3S9997-IQC80-C5 is marked obsolete. The lifecycle record does not list an official replacement part number. For new designs, consider a current-generation Cortex-M4 or M7 MCU with similar peripheral integration (Ethernet, CAN, USB OTG) from the same or alternate vendor.

Where can I buy LM3S9997-IQC80-C5?

Submit an RFQ for current availability and pricing; quotes are confirmed at order time. Stock positions change frequently for obsolete components, so a direct inquiry is the fastest path to a commitment.

What is the core speed and memory configuration of LM3S9997-IQC80-C5?

The ARM Cortex-M3 core runs at 80 MHz. Program memory is 256 KB of Flash, and data memory is 64 KB of SRAM. This combination supports moderate-complexity firmware with a real-time OS and communication stacks without external memory.

What connectivity interfaces does this MCU include?

The LM3S9997-IQC80-C5 integrates Ethernet MAC+PHY, CAN 2.0B, USB OTG, plus I²C, SPI, SSI, UART, IrDA, LIN, Microwire, and QEI. This makes it suitable for industrial gateways, motor drives, and networked control systems that need both fieldbus and higher-level networking.