ECS ECX-1247 SMD Crystals

ECS ECX-1247 SMD Crystals are compact sub-miniature surface-mount crystals that operate at a 24MHz to 80MHz frequency range. These crystals provide a maximum equivalent series resistance (ESR) range of 50Ω to 100Ω at a 24MHz to 80MHz frequency range. The ECX-1247 series offers ±20ppm frequency tolerance at +25°C and ±20ppm frequency stability at -40°C to +85°C, which ensures high reliability and improved stability. Other features include 100µW drive level, 5pF shunt capacitance, 8pF load capacitance, fundamental mode of operation, and an extended temperature range option. ECS ECX-1247 SMD Crystals are available in a low-profile ceramic package with a 1.6mm x 1.2mm footprint.


  • Compact, sub-miniature SMD crystal
  • Low profile
  • Fundamental mode of oscillation
  • Small footprint
  • Extended temperature range option
  • RoHS complaint


  • 24MHz to 80MHz operating frequency range
  • ±20ppm frequency tolerance at +25°C
  • ±20ppm frequency stability at -40°C to +85°C
  • 100µW drive level
  • 5pF shunt capacitance
  • ESR range
    • 100Ω max. at 24MHz to 29.999MHz
    • 80Ω max. at 30MHz to 48.999MHz
    • 50Ω max. at 49MHz to 80MHz
  • -40°C to +85°C operating temperature range 

Dimensions (mm)

ECS ECX-1247 SMD Crystals
Published: 2018-10-15 | Updated: 2022-10-17