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Texas Instruments LM3S2651-EQC50-A2T — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S2651-EQC50-A2T Stellaris ARM Cortex-M3 MCU, 50 MHz, 128 KB Flash

MPNLM3S2651-EQC50-A2T
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 2000 series 32-bit MCU, LM3S2651-EQC50-A2T, 50 MHz core, 128 KB Flash, 32 KB RAM, 53 I/O, CAN/I²C/SPI/UART, 100-LQFP, -40°C to 105°C.

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

Specifications

LM3S2651-EQC50-A2T specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 2000
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 size32K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)53
Core processorARM® Cortex®-M3
Case100-LQFP
Data convertersA/D 4x10b
Program memory size128KB (128K x 8)

Product details

50 MHz ARM Cortex-M3 with industrial I/O

The LM3S2651-EQC50-A2T is a 32-bit ARM Cortex-M3 MCU from the Stellaris family, clocked at 50 MHz with 128 KB of Flash program memory and 32 KB of SRAM.

Memory and peripheral fit

The 4-channel 10-bit ADC covers analog feedback from potentiometers or current shunts. Brown-out reset and POR are on-chip, so the external supervisor can be a simple resistor-capacitor pair.

Supplied in a 100-pin LQFP (14x14 mm body) on Tape & Reel. Surface-mount only — no through-hole variant.

Frequently asked questions

Where can I buy LM3S2651-EQC50-A2T and how do I get a price?

We source this obsolete part through independent distribution. Submit an RFQ for current availability and pricing — we confirm both at quote time. No stock or price figures are published here because the surplus market moves daily.

What is LM3S2651-EQC50-A2T's listed speed?

The core runs at 50 MHz. That is the maximum clock for the ARM Cortex-M3 on this device; bus timing and peripheral clocks are derived from it.

What interfaces does this MCU support?

It includes CANbus, I²C, IrDA, Microwire, SPI, SSI, and UART/USART. The CAN interface makes it a natural fit for industrial automation and vehicle bus nodes.