The ABM8G-40.000MHZ-18-D2Y-T is an ultra-miniature ceramic glass sealed SMD crystal oscillator designed for high-density applications requiring compact form factors. This crystal operates at a fundamental frequency of 40.000 MHz with an operating temperature range of -40°C to +85°C and storage temperature range of -40°C to +85°C, providing reliable performance across demanding environments. The device features a hermetically sealed glass package with dimensions of 3.2 × 2.5 × 1.0 mm, ensuring high reliability and enabling operation at elevated temperatures while maintaining low profile suitable for thin equipment. With frequency tolerance of ±20 ppm at +25°C, frequency stability of ±30 ppm over the operating temperature range, and equivalent series resistance of 60 O, this crystal is ideal for modems, communication equipment, test equipment, and wireless applications where space constraints and thermal stability are critical.