DESCRIPTION

ECS-18-32-1 is an HC-49U quartz crystal designed for precision timing applications, featuring AT-cut crystal technology with excellent aging characteristics and tight frequency tolerances. The device operates across a frequency range of 1.8 MHz to 100 MHz in fundamental mode, with frequency tolerance of ±30 ppm at +25°C and frequency stability of ±50 ppm over the operating temperature range of -10°C to +70°C. Key electrical specifications include maximum equivalent series resistance (ESR) varying by frequency band (750 O at 1.8–1.999 MHz down to 20 O at 16–25 MHz), shunt capacitance of 7.0 pF maximum, and load capacitance of 10.0 pF (customer specified). The crystal exhibits excellent reliability with first-year aging of ±5.0 ppm at +25°C and supports drive levels of 2.0 mW (1.8–3.0 MHz) and 1.0 mW (3.0–100 MHz). This cost-effective component is ideal for consumer electronics, telecommunications, and industrial timing applications requiring stable frequency references.