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Texas Instruments LM3S5G36-IQR80-A1T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S5G36-IQR80-A1T Stellaris Cortex-M3 MCU, 80 MHz, 384 KB Flash

MPNLM3S5G36-IQR80-A1T
Obsolete

TI/Stellaris® ARM® Cortex®-M3S 5000 series LM3S5G36-IQR80-A1T, 32-bit single-core MCU, 80 MHz, 384 KB Flash, 64 KB SRAM, 33 I/O, 8x12-bit ADC, CAN/USB/UART/SPI/I²C, 64-LQFP, -40°C to 85°C.

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

Specifications

LM3S5G36-IQR80-A1T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 5000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))3V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed80MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, Microwire, QEI, SPI, SSI, UART/USART, USB
Number of i (O)33
Core processorARM® Cortex®-M3
Case64-LQFP
Data convertersA/D 8x12b
Program memory size384KB (384K x 8)

Product details

The LM3S5G36-IQR80-A1T is a 32-bit ARM Cortex-M3 microcontroller from the TI Stellaris 5000 series, running at 80 MHz with 384 KB of Flash program memory and 64 KB of SRAM. It is built for industrial control and embedded communication tasks that need a rich peripheral set: CAN, USB, UART, SPI, I²C, LIN, and IrDA are all on-chip, along with an 8-channel 12-bit ADC and a quadrature encoder interface for motor feedback.

At 80 MHz, this Cortex-M3 delivers 80 MHz of integer throughput. The 384 KB Flash and 64 KB SRAM support a real-time control loop alongside a CANopen or Modbus stack.

Frequently asked questions

What is the closest pin-compatible alternative to LM3S5G36-IQR80-A1T?

TI does not list a direct pin-compatible successor for this specific order code. For new designs, consider the active Tiva-C TM4C123 or TM4C129 series, which share the Cortex-M4 core and similar peripheral sets but require a board spin. For a drop-in replacement, contact us with your BOM and we can search the surplus market for a match.

What is LM3S5G36-IQR80-A1T's listed speed?

The core runs at 80 MHz, which is the maximum clock frequency for this Cortex-M3 device.

What series is LM3S5G36-IQR80-A1T from?

It belongs to the TI Stellaris ARM Cortex-M3S 5000 series, a family of 32-bit MCUs with integrated CAN, USB, and analog peripherals.