frequency control products web site : http://www.fordahl.com miniature smd tcxo type dfa s1-khz (5 v) & dfa s1-lhz (3.3 v) recommended for new designs tentative data crystal packed into its own holder ideal for volume applications external voltage control low profile function dfa s1 v control / gnd 1 e / d 2 gnd 3 output 4 n / c 5 vcc 6 type dfa s1-khz dfa s1-lhz frequency range 10 to 30 mhz 10 to 30 mhz electrical specifications supply voltage 5 v 5 % 3.3 v 5 % supply current ( no load) 20 ma 10 ma output load hcmos 15 pf or 2 ttl hcmos 15 pf or 2 ttl duty cycle @ 50% level 40/60...60/40 % 40/60...60/40 % rise/fall times (10 to 90 %) 10 ns 10 ns high/low levels or output amplitude 4.5 v/ 0.5 v 2.8 v/ 0.3 v start-up 10 ms @ 4.75 v 10 ms @ 3.15 v tri-state control on pin 2 high or open = enable, low = high z high or open = enable, low = high z frequency stability detailed tolerances [ ppm ] temperature model stability versus : calibration type range code temperature vcc 5 % load 10 % ageing @ 25 c 0 to 70c b0.5 0.5 -20 to 70c c1.5 1.5 all types -30 to +75c n2.5 2.5 0.3 0.3 1 1 remarks ageing is 1 st year at 25c options code tighter symmetry r 45/55...55/45 % voltage control on pin 1 (positive slope ) v 5ppm, 15 ppm 2.5 v 2 v 5 ppm, 15 ppm 1.65 v 1.35 v ordering code type + option code + frequency + model code example dfa s1-khzv 19.44 mhz n2.5 pc board footprint 9.10.1 14.80.2 1.3 1.0 5.08 6 5 4 3 2 1 5.90.1 2.54 8.9 5.08 1.27
|
