X21 Min. Surface Mount Crystals Fund. Max. 20MHz [ 2.0 * 1.6 * 0.6 mm ] 54MHz Features Specifications ● The entire package can be grounded via the top metal lid and the two bottom pads . ● Small footprint. Ideal for space constrained applications ● Exhibits extremely low aging with a high shock & vibration resistance. General Specifications Item / Type X21 series ( 2.0 * 1.6 * 0.6 mm ) Frequency Range 20.000 ~ 54.000 MHz Crystal Cut Fundamental Mode , AT-Cut Load Capacitance Series or Parallel ( 8 to 32 pF ) resonance Drive Level 10µ W typical Frequency Tolerance ( 100µ W max. ) ± 10 ppm , ± 20 ppm or ± 30 ppm at 25°C Frequency Stability See Table 2 △F / F : ±3 ppm / year ( max. ) Aging Storage Temperature Range - 50°C to 105°C Table 1 Table 2 ESR ( Equivalent Series Resistance ) Frequency stability Vs Operating temperature range Frequency Range E. S. R. Stability code Temp. (ºC) \ ppm ±5 ± 10 ± 15 ± 20 ± 25 ± 30 20.000 ~ 30.000 MHz 120 Ω max. X -10 to 60°C ▲ ○ ○ ○ ○ ○ 30.100 ~ 54.000 MHz 80 Ω max Y -20 to 70°C ○ ○ ○ ○ ○ I -40 to 85°C ○ ○ ○ ○ ○ : available ; ▲ : contact Mercury Outline Dimensions ( Unit : mm ) Mercury www .mercury-crystal.com ■Taiwan : Tel (886)-2-2406-2779 / [email protected] ■U.S.A: Tel: (1)-909-466-0427 / [email protected] ■China: Tel: (86)-512-5763-8100 / [email protected]