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Texas Instruments LM3S2637-IBZ50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

Texas Instruments LM3S2637-IBZ50-A2 ARM Cortex-M3 MCU

MPNLM3S2637-IBZ50-A2
NRND

Texas Instruments Stellaris LM3S2637-IBZ50-A2, ARM Cortex-M3 32-bit single-core MCU, 50 MHz, 128 KB Flash, 32 KB RAM, 2.25 V–2.75 V supply, 46 I/O, 108-LFBGA, -40°C to 85°C.

$19.5223Ref. price · indicative, final on quote
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S2637-IBZ50-A2 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~85°C(TA)
Speed50MHz
PackageTray
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)46
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 4x10b
Program memory size128KB (128K x 8)

Product details

The LM3S2637-IBZ50-A2: TI is not actively developing this device for new production programs, though existing designs can still be supported through the independent distribution channel while inventory lasts. For a new BOM line, the NRND flag means you should qualify an alternate part.

Memory and peripheral fit for control applications

50 MHz core — where the speed matters

The 50 MHz Cortex-M3 core delivers roughly 1.25 DMIPS/MHz, or about 62.5 DMIPS. That is enough throughput for real-time control loops running at 10–20 kHz update rates, CAN message handling at 1 Mbps, and moderate DSP-style filtering on the 10-bit ADC samples.

Package and supply rail considerations

The industrial temperature rating means the device is characterized for operation down to -40°C, which matters for outdoor telecom cabinets, engine-bay-adjacent controllers, and cold-chain logistics equipment.

Frequently asked questions

What is the exact replacement for LM3S2637-IBZ50-A2?

The evidence does not list an official direct replacement part number from TI. For a pin-compatible upgrade path within the Stellaris family, you would need to cross-reference the LM3S2000 series portfolio against the 108-BGA footprint and 2.5 V supply requirement. Contact us with your volume and target application for a qualified alternate recommendation.

Is LM3S2637-IBZ50-A2 recommended for new designs?

No. Its NRND status means TI does not recommend it for new production designs. For a new BOM line, you should select a currently active Stellaris or TM4C-series Cortex-M4 part that meets the same 2.5 V supply and BGA footprint requirements.