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Texas Instruments LM3S8733-EQC50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S8733-EQC50-A2T ARM Cortex-M3 MCU, 50 MHz

MPNLM3S8733-EQC50-A2T
Obsolete

Texas Instruments Stellaris® ARM® Cortex®-M3S 8000 series MCU, LM3S8733-EQC50-A2T, 32-Bit Single-Core 50MHz, 128KB Flash, 64K x 8 RAM, 35 I/O, CAN/Ethernet/I²C/SPI/UART, 100-LQFP, -40°C~105°C.

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

Specifications

LM3S8733-EQC50-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 8000
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2.25V ~ 2.75V
Operating temperature-40°C~105°C(TA)
Speed50MHz
PackageTape & Reel (TR)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, Ethernet, I²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)35
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 4x10b
Program memory size128KB (128K x 8)

Product details

The Texas Instruments LM3S8733-EQC50-A2T is a 32-bit ARM Cortex-M3 microcontroller from the Stellaris 8000 series, clocked at 50 MHz with 128 KB of Flash program memory and 64K x 8 of SRAM.

50 MHz Cortex-M3 — what the speed buys you

The 50 MHz core runs a real-time control loop with Ethernet stack overhead.

128 KB Flash and 64 KB RAM — firmware budget

128 KB of Flash holds a bootloader, a TCP/IP or CANopen stack, and application logic. The 64 KB SRAM handles packet buffers and control data structures.

Obsolete — sourcing reality for the LM3S8733-EQC50-A2T

Frequently asked questions

Is LM3S8733-EQC50-A2T obsolete?

Yes, Texas Instruments has marked the LM3S8733-EQC50-A2T as Obsolete. No factory last-time-buy is available. The part is sourced through independent surplus channels against an RFQ.

What is the replacement for LM3S8733-EQC50-A2T?

No official pin-compatible replacement is listed in the TI records. For new designs, TI recommends migrating to the Tiva C Series (Cortex-M4F) or another current ARM MCU family, but a drop-in footprint match is not documented. Verify your PCB layout and firmware porting effort before selecting an alternate.

What are the key specifications of LM3S8733-EQC50-A2T?

The LM3S8733-EQC50-A2T is a 32-bit ARM Cortex-M3 MCU running at 50 MHz with 128 KB Flash, 64K x 8 SRAM, 35 GPIOs, CAN, Ethernet, I²C, SPI, UART, a 4-channel 10-bit ADC, and PWM. It operates from 2.25 V to 2.75 V over -40°C to 105°C in a 100-LQFP package.

Is LM3S8733-EQC50-A2T still available anywhere?

Yes, through independent surplus and broker channels. The factory has ended production, but existing inventory is still in the supply chain. We can quote it to order — availability is confirmed at RFQ time.