357 beloit street, p.o. box 457, burlington, wi 53105-0457 u.s.a. phone 262/763-3591 fax 262/763-2881 email: nelsales@nelfc.com www.nelfc.com cmos sc-1420 series description the sc-1420 series of quartz crystal oscillators provide enable/disable 3-state cmos compatible signals for bus connected systems. supplying pin 1 of the sc-1420 units with a logic ?1" or open enables its pin 3 output. in the disable mode, pin 3 presents a high impedance to the load. features ? wide frequency range?1.0mhz to 80.0mhz ? user specified tolerance available ? will withstand vapor phase temperatures of 253c for 4 minutes maximum ? space-saving alternative to discrete component oscillators ? high shock resistance, to 1000g ? low jitter ? no internal pll avoids cascading pll problems ? metal lid electrically connects to ground to reduce emi ? gold plated pads electrical connection pin connection 1 enable/disable 2 ground 3 output 4 v dd crystal clock oscillators data sheet k2151 rev. e
357 beloit street, p.o. box 457, burlington, wi 53105-0457 u.s.a. phone 262/763-3591 fax 262/763-2881 email: nelsales@nelfc.com www.nelfc.com sc-1420 series continued cmos operating conditions and output characteristics electrical characteristics parameter symbol conditions min typical max frequency ----- ----- 1.0mhz ----- 80.0mhz duty cycle ----- @ v dd /2 45/55% ----- 55/45% logic 0 v ol @ 600a ----- ----- 0.2v logic 1 v oh @ 600a v dd -0.2v ----- ----- rise & fall time tr,tf 10-90%v o ----- ----- 8.0 ns jitter, rms (2) ----- overtone ----- ----- 5 psec fundamental ----- ----- 8 psec t pz ----- ----- ----- ----- 25 ns enable voltage ----- ----- 2.0v ----- ----- disable voltage ----- ----- ----- ----- 0.8v frequency stability (1) df/f overall conditions including: -100ppm ----- +100ppm voltage, calibration, temp., 10 year aging, shock, vibration general characteristics parameter symbol conditions min typical max supply voltage (3) v dd ----- 4.75v 5.0v 5.25v supply current i dd no load 0.0 ma ----- 40 ma output current i o low level output current 0.0 ma ----- 16.0 ma operating temperature t a ------ 0c ----- 70c storage temperature t s ----- -55c ----- 125c power dissipation p d ----- ----- ----- 210 mw lead temperature t l soldering, 10 sec. ----- ----- 300c load ----- ----- ----- ----- 15pf start-up time t s 20mhz or greater ----- ----- 10 ms less than 20mhz ----- ----- 2 ms environmental and mechanical characteristics mechanical shock per mil-std-202, method 213, condition e thermal shock per mil-std-833, method 1011, condition a vibration 0.060" double amplitude 10 hz to 55 hz, 35g?s 55hz to 2000 hz soldering condition 300c for 10 seconds hermetic seal leak rate less than 1 x 10 -8 atm.cc/sec footnotes: 1) standard frequency stability (20,25,50ppm & others available) 2) jitter performance is frequency dependent. please contact factory for full characterization. 3) external high frequency power supply decoupling required. rev. e crystal clock oscillators sc - a 142x - freq package code tolerance/performance sc 4 pad 5x7mm smd 0 100ppm 0-70c 1 50ppm 0-70c 7 25ppm 0-70c input voltage 9 customer specific code specification a 20ppm 0-70c a 3.3v b 50ppm -40 to +85c 5v c 100ppm -40 to +85c creating a part number data sheet k2151
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