50 MHz Cortex-M3 with USB OTG and CAN — what this MCU brings to an industrial BOM
The LM3S5752-IQR50-A0T is a 32-bit ARM Cortex-M3 MCU from the Stellaris 5000 series, clocked at 50 MHz and built around a single-core Harvard architecture with 128 KB of Flash program memory and 64 KB of SRAM. It carries a full set of connectivity peripherals — USB OTG, CAN, I²C, SPI, SSI, UART, and IrDA — making it a fit for embedded control nodes that need both a fieldbus interface and a host USB port. The industrial temperature grade (-40°C to 85°C) and the 2.25 V to 2.75 V supply range suit it for factory-floor controllers, pump/motor drive communication bridges, and outdoor telecom line cards where the ambient envelope stays within that range.
128 KB Flash, 64 KB SRAM — sizing the firmware and data budget
128 KB Flash and 64 KB SRAM fit a USB device stack, CANopen or Modbus RTU protocol layer, and a control loop.
EOL hot — what that means for the BOM line
The LM3S5752-IQR50-A0T carries an EOL hot lifecycle status, meaning the manufacturer has initiated end-of-life transition. For a production BOM, this part is no longer recommended for new designs, and existing designs should plan for a migration window. Sourcing is through independent distribution channels; availability and current pricing are confirmed at quote time against an RFQ. No official successor part number is listed in the lifecycle record, so a pin-compatible replacement within the Stellaris 5000 series should be evaluated by reviewing the family's memory and peripheral options in the same 64-LQFP package.
Connectivity peripherals — which interfaces are on this die
Peripherals include USB OTG, CAN, I²C, SPI, SSI, UART, IrDA, and a 6-channel 10-bit ADC.
Package and temperature grade — board fit and environment
64-LQFP package with 10x10 mm body, surface-mount, -40°C to 85°C operating range, 2.25 V to 2.75 V supply.