42 ecs, inc. international 1105 s. ridgeview, olathe, ks 66062 ?913-782-7787 ?800-237-1041 ?fax 913-782-6991 ?www.ecsxtal.com smd oscillators smd oscillators features ?3.3 or 5.0v version ?miniature profile ?low power consumption ? t a pe & r ee l ( 1 , 00 0 p c s . ) ? rohs compliant (note 7 exemption) ecs-3951c/3953c series smd clock oscillator * ecs-3953c is also compatible with a supply voltage of +3.0v dc ?.3v ** inclusive of 25?c tolerance, operating temperature range, input voltage change, load change, aging shock and vibration. *** an internal pullup resistor from pin 1 to 4 allows active output if pin 1 is left open. note: a 0.01 ? bypass capacitor should be placed between vcc (pin 4) and gnd (pin 2) to minimize power line noise. figure 1) ecs-3951c/3953c top, side and bottom views package dimensions (mm) pin connections #1 tri-state*** #2 gnd #3 output #4 v cc the ecs-3951c (5v) and ecs-3953c (3.3v) series are miniature, crystal controlled, low current clock oscillator in a ceramic smd package. the low profile package is ideal for today? advanced portable pc and instrumentation designs. figure 2) land pattern ecs-3951c/3953c standby control voltage pin #1 = open *** #3 = oscillation pin #1 = v cc x0.9 min #3 = oscillation pin #1 = v cc x0.1 max #3 = high impedance sample part number: ECS-3951C-500-B part numbering guide frequency (50.0 mhz) stability tolerance (50 ppm) ecs-3951c 500 b operating conditions/electrical characteristics ecs-3951c (5v) ecs-3953c (3.3v)* parameters conditions min typ max min typ max units frequency range 1.800 80.000 1.800 80.000 mhz operating 0 +70 0 +70 ? c temperature range storage -55 +125 -55 +125 ? c supply voltage +4.5 +5.0 +5.5 +3.0 +3.3 +3.6 v dc standard -100 40 +100 100 40 +100 ppm option (b) -50 +50 -50 +50 ppm frequency stability** option (c) -25 +25 -25 +25 ppm 1.8 ~ 30.0 mhz 10 8 ma 30.0 ~ 35.0 mhz 15 8 ma 35.0 ~ 50.0 mhz 30 12 ma 50.0 ~ 66.0 mhz 30 15 ma input current 66.0 ~ 80.0 mhz 50 30 ma output symmetry @ 1/2 v cc level 40/60 50 4 60/40 40/60 50 4 60/40 % rise and fall times 10 15 ns logic 0 level v cc x 0.1v max. logic 1 level v cc x 0.9v min. load hcmos 15 15 pf 1.8 ~ 36.0 mhz 5 5 ms start-up time 36.0 ~ 80.0 mhz 10 10 ms vol=0.5v/0.33 4 4 ma output current (iol) (ioh) voh=4.5v/2.97v -4 -4 ma enable/disable time 100 100 ns 7.5 0.2 5.00 0.2 2.54 1.60 0.15 1 1 4 2 3 3 2 4 1.00 5.08 0.10 1.40 5.08 4.20 2.00 1.40 0.01 f
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