The ECS-250-20-33-TR is a sub-miniature SMD crystal oscillator designed for compact, high-density applications including LoRa WAN and wireless systems. It operates in fundamental mode with a frequency range of 8.000 to 54.000 MHz and features a low-profile 3.2 × 2.5 mm footprint with a maximum height of 0.8 mm, making it ideal for space-constrained designs. The device exhibits a frequency tolerance of ±50 ppm at +25°C and frequency stability of ±50 ppm across the operating temperature range of -20°C to +70°C, with a maximum shunt capacitance of 5 pF and load capacitance of 20 pF. The crystal is RoHS compliant and available with extended temperature range options, providing reliable performance for modern wireless and IoT applications.