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Texas Instruments LM3S9997-IBZ80-C5 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S9997-IBZ80-C5 Stellaris ARM Cortex-M3 MCU, 80MHz

MPNLM3S9997-IBZ80-C5
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 9000 series LM3S9997-IBZ80-C5, 32-Bit Single-Core MCU, 80MHz, 256KB Flash, 64K x 8 RAM, 108-LFBGA, -40°C~85°C.

Texas Instruments LM3S9997-IBZ80-C5 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S9997-IBZ80-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
Case108-LFBGA
Data convertersA/D 16x10b
Program memory size256KB (256K x 8)

Product details

Core and memory — what the 80MHz and 256KB mean for fit

The 256KB of on-chip Flash and 64K x 8 SRAM support moderate firmware images — think a TCP/IP stack with a small application layer, or a CANopen node with a few hundred objects. If your firmware image or data buffer exceeds this, you are looking at a larger member of the Stellaris family or a migration to a newer Cortex-M4 or M7 part.

Peripheral set — Ethernet, CAN, USB OTG on one chip

The 16-channel 10-bit ADC covers analog sensing for voltage, current, or temperature inputs.

Package and temperature — 108-BGA, industrial range

Supply voltage is a tight 1.235V to 1.365V core rail — that means a dedicated low-noise regulator, not a shared 3.3V or 5V rail. Plan for a separate 1.25V or 1.3V LDO with adequate decoupling.

Frequently asked questions

Is LM3S9997-IBZ80-C5 obsolete?

Yes, the LM3S9997-IBZ80-C5 is officially Obsolete per the lifecycle record. It is no longer manufactured by Texas Instruments.

What is the replacement for LM3S9997-IBZ80-C5?

For a pin-compatible replacement, you would need to evaluate other Stellaris 9000 series devices in the same 108-BGA package, but Texas Instruments has not published a direct drop-in. In practice, a migration to a newer Cortex-M4 or M7 family (such as the TM4C series) with similar peripheral integration is the typical path, though it will require a board spin and firmware port.