25 MHz Cortex-M3 with Ethernet — what this part is
The LM3S6610-IBZ25-A2T is a Stellaris ARM Cortex-M3S 6000 series 32-bit single-core MCU clocked at 25 MHz, with 128 KB of Flash program memory and 32K x 8 of SRAM. It integrates an Ethernet MAC, I²C, SPI, SSI, UART/USART, IrDA, Microwire, and a Quadrature Encoder Interface (QEI), plus PWM, watchdog timer, brown-out detect, and POR peripherals. The part is supplied in a 108-LFBGA package (10x10 mm BGA) and operates over -40 to 85°C with a 2.25 to 2.75 V supply. It is designed for embedded control applications requiring a network connection — industrial gateways, building automation controllers, and sensor concentrators that need a compact, single-chip Ethernet node.
What the ratings mean for fit
The 25 MHz core speed handles TCP/IP stack processing, Modbus/TCP polling, and sensor data aggregation. The 128 KB Flash and 32K x 8 RAM support moderate firmware and runtime data.
Obsolete — sourcing reality
This part is marked Obsolete by the manufacturer. No last-time-buy window or successor order code is listed. For legacy board repair or field retrofit, source through the independent surplus market. We quote to order against an RFQ.