45 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 ? high capacitive load options ? low power consumption ? tri-state function ? seam welded package ? tape & reel (1,000 pcs std) ECS-3955M series smd clock oscillator the ECS-3955M (5v) ia a high capacitive load version of our minature, crystal controlled, low current clock oscillator in an all ceramic smd package. the low profile package is ideal for pcs, portable applications and pcmcia cards. 7.5 max. 5.0 max. 1.6 0.15 2.6 1 2 3 4 5.08 max. 1 3 2 4 0.6 1.4 figure 1) ECS-3955M series top, side and bottom views package dimensions (mm) pin connections #1 tri-state** #2 gnd #3 output #4 v cc 5.08 4.20 2.00 1.40 0.01 f figure 2) land pattern ECS-3955M standby control voltage pin #1 = open #3 = oscillation pin #1 = +2.2v min #3 = oscillation pin #1 = 0.8v max #3 = high impedance sample part number: ECS-3955M-500-b part numbering guide package type frequency (50.0 mhz) stability tolerance (b=50 ppm) ECS-3955M C 500 C b * 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. operating conditions/electrical characteristics ECS-3955M (5v) parameters conditions min typ max units frequency range 1.800 70.0 mhz operating -10 +70 ?c temperature range storage -55? +125 ?c supply voltage +4.5 +5.0 +5.5 v dc standard 100 ppm option (b) 50 ppm frequency stability* option (c) 25 ppm 1.8 ~ 36.0 mhz 30 ma input current 36.1 ~ 70.0 mhz 65 ma output symmetry @ 1/2 v cc level 40/60 50 4 60/40 % rise and fall times 7 ns vol v cc x 0.1v v dc output voltage voh v cc x 0.9v v dc load hcmos 50 pf 1.8 ~ 36.0 mhz 5 ms start-up time 36.0 ~ 70.0 mhz 10 ms vol 16 ma output current (iol) (ioh) voh -16 ma enable/disable time 100 ns (iol)
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