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Texas Instruments LM3S9U90-IBZ80-A1 — Microcontrollers & Processors (MCU / MPU / DSP)

TI LM3S9U90-IBZ80-A1 Stellaris ARM Cortex-M3 MCU, 80MHz

MPNLM3S9U90-IBZ80-A1
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 9000 series LM3S9U90-IBZ80-A1, 32-bit single-core MCU, 80MHz, 384KB Flash, 96KB RAM, 60 I/O, Ethernet/CAN/USB OTG, 108-LFBGA (10x10mm), -40°C to 85°C, tray.

Texas Instruments LM3S9U90-IBZ80-A1 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S9U90-IBZ80-A1 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)60
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 16x12b
Program memory size384KB (384K x 8)

Product details

The LM3S9U90-IBZ80-A1 is a 32-bit ARM Cortex-M3 MCU from the Stellaris 9000 series, clocked at 80 MHz with 384 KB of Flash and 96 KB of RAM. It integrates Ethernet, CAN, USB OTG, SPI, I²C, UART, and SSI interfaces.

The 80 MHz core delivers integer throughput suitable for a lightweight RTOS and TCP/IP stack. The 96 KB of SRAM supports moderate-sized packet buffers.

The LM3S9U90-IBZ80-A1 is officially obsolete per Texas Instruments. No direct pin-compatible successor is listed. We source this part to order against an RFQ.

The 108-ball BGA (10x10 mm) requires a multi-layer PCB. Core supply is 1.235 V to 1.365 V.

Frequently asked questions

Is LM3S9U90-IBZ80-A1 obsolete?

Yes, the LM3S9U90-IBZ80-A1 is officially obsolete. There is no direct pin-compatible replacement from Texas Instruments; the part is sourced through the independent surplus channel.

What is the replacement for LM3S9U90-IBZ80-A1?

No official direct replacement is listed. The TM4C129x family offers a superset of peripherals and a Cortex-M4F core, but it uses a different BGA footprint. For a drop-in, you will need to source the original part through surplus distribution.

What are the specifications of LM3S9U90-IBZ80-A1?

It is a 32-bit ARM Cortex-M3 MCU running at 80 MHz with 384 KB Flash and 96 KB RAM. Connectivity includes Ethernet, CAN, USB OTG, SPI, I²C, UART, and SSI. It has 60 I/O, a 16-channel 12-bit ADC, and operates from -40°C to 85°C in a 108-ball BGA package.

Is there a cross-reference for LM3S9U90-IBZ80-A1?

No official cross-reference or second-source alternate is listed. The part is unique to the Stellaris 9000 series; any replacement will require a PCB layout change.