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 lvcmos sc-a1420 series description the sc-a1420 series of quartz crystal oscillators provide enable/disable 3-state lvcmos compatible signals for bus connected systems. supplying pin 1 of the sc-a1420 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 ? space-saving alternative to discrete component oscillators ? 3.3 volt operation ? high shock resistance, to 1000g ? high reliability - nel halt/hass qualified for crystal oscillator start-up conditions ? low jitter - wavecrest jitter characterization available ? no internal pll avoids cascading pll problems ? metal lid electrically connected to ground to reduce emi ? gold plated pads ? rohs compliant, lead free construction electrical connection pin connection 1 enable/disable 2 ground 3 output 4 v dd crystal clock oscillators data sheet k2343 rev. d
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-a1420 series continued lvcmos 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 : 1.0 to 20.0mhz ----- 3.5ns 5.0ns 20.1 to 50.0mhz ----- 3.3ns 4.5ns 50.1 to 80.0mhz ----- 1.5ns 4.0ns jitter, integrated j integrated from phase noise, ----- 0.1 ps ----- 12khz to 20mhz, rms jitter, wavecrest characterized (2) ----- random period ----- 2.3ps ----- accum, pk-to-pk ----- 26ps ----- phase noise (4) ( f) @ 10hz ----- -70 dbc/hz ----- @100hz ----- -105 dbc/hz ----- @1khz ----- -130 dbc/hz ----- @10khz ----- -145 dbc/hz ----- @100khz ----- -150 dbc/hz ----- @ >1mhz ----- -150 dbc/hz ----- 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 3.310% 2.97v 3.3v 3.63v 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 ----- ----- ----- 145 mw 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-st d-202, method 213, condition e thermal shock per mil-std- 883, method 1011, condition a vibration 0.060" double amplitude 10 hz to 55 hz, 35g?s 55hz to 2000 hz 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 wavecrest characterization. 3) external high frequency power supply decoupling required. 4) if phase noise data at a particular frequency is needed, contact factory. rev. d 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 b 2.5v c 100ppm -40 to +85c 5v creating a part number data sheet k2343
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