The LM3S1626-IQR50-A0T runs a single ARM Cortex-M3 core at 50 MHz — the throughput ceiling for control-loop tasks like motor commutation, sensor fusion, or protocol bridging sits at roughly 62.5 MIPS assuming one instruction per cycle on the Thumb-2 ISA. On-chip memory is 128 KB of flash for firmware and 32 KB of SRAM for data buffers and stack — enough for a Modbus RTU gateway handling a few dozen holding registers, or a brushless DC motor controller with a 1 kHz current loop and a UART telemetry stream.
Industrial temperature grade and supply rail tolerance
Rated for -40 to +85 °C ambient (TA) — this is the industrial temperature band covering factory-floor enclosures, outdoor telecom cabinets, and engine-bay-adjacent modules that see 70 °C soak. A 2.5 V LDO with ±2 % tolerance holds the core within spec across load transients.
Peripherals and connectivity for sensor and motor interfaces
On-chip peripherals include Brown-out Detect/Reset, POR, PWM, and a watchdog timer — these reduce the external supervisor IC count to zero for most designs. Connectivity covers I²C, SPI, SSI, UART/USART, plus a Quadrature Encoder Interface (QEI) for direct motor position feedback — a single chip handles encoder read, PWM generation, and fieldbus bridging. A 6-channel 10-bit ADC is integrated — sufficient for monitoring three-phase currents plus a temperature sense and a voltage reference check in a motor-drive application.
64-LQFP package — board integration and rework
Housed in a 64-LQFP with a 10x10 mm body — the 0.5 mm pitch demands a 4-layer board for fan-out on the inner rows; two-layer breaks out only the outer 32 pins. Surface-mount only — the exposed pad on the LQFP-64 is not a thermal pad (no thermal slug), so the junction-to-ambient thermal resistance is set by the copper area on the top layer, not a bottom-side plane.
The Stellaris family was migrated to the Tiva C series, but pin-compatibility is not guaranteed without a board spin. Quantities are lot-specific; full traceability and RoHS compliance documentation are confirmed at RFQ. No stock-holding claim — sourced per order against the BOM quantity.