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Texas Instruments LM3S6537-IBZ50-A2 — Microcontrollers & Processors (MCU / MPU / DSP)

LM3S6537-IBZ50-A2 Stellaris ARM Cortex-M3 MCU, 50 MHz, 96 KB Flash, Obsolete

MPNLM3S6537-IBZ50-A2
Obsolete

Texas Instruments Stellaris ARM Cortex-M3S 6000 series MCU, LM3S6537-IBZ50-A2, 32-bit single-core at 50 MHz, 96 KB Flash, 64 KB RAM, 41 I/O, Ethernet, I2C, SPI, UART, 4x10-bit ADC, -40 to 85 °C, 108-BGA.

$13.7000Ref. price · indicative, final on quote
Texas Instruments LM3S6537-IBZ50-A2 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM3S6537-IBZ50-A2 specifications
ParameterValue
SeriesStellaris® ARM® Cortex®-M3S 6000
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 size64K x 8
Core size32-Bit Single-Core
PeripheralsBrown-out Detect/Reset, POR, PWM, WDT
ConnectivityEthernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART
Number of i (O)41
Core processorARM® Cortex®-M3
Case108-LFBGA
Data convertersA/D 4x10b
Program memory size96KB (96K x 8)

Product details

The LM3S6537-IBZ50-A2: 32-bit ARM Cortex-M3 microcontroller from the Stellaris 6000 series, clocked at 50 MHz. It has 96 KB of Flash and 64 KB of RAM, with Ethernet, I2C, SPI, UART, IrDA, Microwire, and SSI interfaces.

At 50 MHz, this Cortex-M3 handles moderate control loops, protocol stacks (TCP/IP, Modbus TCP), and data logging without breaking a sweat. It is not a high-throughput DSP replacement — the 10-bit ADC and lack of a hardware FPU or MAC tell you that. For a panel gateway or an Ethernet-enabled motor drive controller, though, the speed is well matched to the peripheral set.

TI marked this part obsolete. No factory orders or last-time-buy window remain. The only channel is the independent surplus and broker market.

The 108-ball BGA (10x10 mm) requires standard surface-mount reflow.

Frequently asked questions

What is the replacement for LM3S6537-IBZ50-A2?

TI's recommended migration path is the TM4C123x series (Cortex-M4F), but these are not pin-compatible. The LM3S6537-IBZ50-A2T is the same die in tape-and-reel packaging — a drop-in for the same BGA footprint. No direct pin-compatible second source exists from TI.

What are the key specifications of LM3S6537-IBZ50-A2?

ARM Cortex-M3 core at 50 MHz, 96 KB Flash, 64 KB RAM, 41 I/O, Ethernet MAC, I2C, SPI, UART, IrDA, Microwire, SSI, 4x10-bit ADC, 2.25 V to 2.75 V supply, -40 °C to 85 °C, 108-BGA package.