Model 425

The Model 425 is Surface Mount Quartz Crystal.It has 9 features.First standard 2.5x2.0mm Surface Mount Footprint.Second stable frequency Over Temperature and Drive Level.Third fundamental crystal Design.Fourth Frequency Range 1654 MHz.Fifth frequency tolerance, ±30 ppm Standard (±10 ppm,±15 ppm and ±20 ppm available).Sixth frequency stability,±50 ppm Standard (±10,±20,±30 and ±40 ppm available).Seventh operating temperature to 40°C to +85°C.Eighth Tape & Reel Packaging, EIA-481-2 Compliant.Ninth RoHS/Green Compliant (6/6).
The Model 425 is a ceramic packaged Crystal offering reduced size, ideal for high-density circuit board applications. The Model 425 offers reliable precision and excellent shock performance in wireless telecommunication devices.
The Model 425 has some environmental specifications.The temperature cycle is 400 cycles from 55°C to +125°C, 10 minute dwell at each temperature, 1 minute transfer time between temperatures.The mechanical shock is 1,500g's, 0.5mS duration, ½ sinewave, 3 shocks each direction along 3 mutually perpendicular planes (18 total shocks).The sinusoidal vibration is 0.06 inches double amplitude, 10 to 55 Hz and 20g's, 55 to 2,000 Hz, 3 cycles each in 3 mutually perpendicular planes (9 times total).The gross leak is no leak shall appear while immersed in an FC40 or equivalent liquid at +125°C for 20 seconds.The fine leak is mass spectrometer leak rates less than 2x10-8 ATM cc/sec air equivalent.The resistance to solder heat is product must survive 3 reflows of +260°C peak, 10 seconds maximum.The high temperature operating bias is 2,000 hours at +125°C, disregarding frequency shift.The frequency aging 1,000 hours at +85°C, maximum ±5 ppm shift.The insulation resistance 500M Ohms @ 100VDC ±15VDC.The moisture sensitivity level is level 1 per JEDEC J-STD-020.
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