frequency control products type dfo 20i revision 00 checked ne date 22.02.2005 page xx high stability miniature ocxo types dfo 20-kh (5 v) & dfo 20-lh (3.3 v) features 10 to 30 mhz low profile package tight stability applications instrumentation, reference function dfo 20 vcc 1 output 2 gnd 3 n.c. or v. control 4 n.c. 5 type dfo 20-kh dfo 20-lh frequency range 10 to 30 mhz standard frequencies 10, 12.8 & 19.44 mhz electrical specifications supply voltage 5 v 5 % 3.3 v 5 % supply current (no load) @ 25c 250 ma 300 ma supply current during warm up 500 ma 800 ma output load hcmos 15 pf or 2 ttl hcmos 15 pf or 2 ttl duty cycle @ 2.5 v 40/60...60/40 % 40/60...60/40 % rise & fall times (10 to 90%) 10 ns 10 ns high/low levels 4.5 v/ 0.5 v 2.7 v/ 0.5 v ssb phase noise (1 hz bw) @ 1 hz -75 dbc/hz -75 dbc/hz (typical @ 12.8mhz) @ 10 hz -100 dbc/hz -100 dbc/hz @ 100 hz -125 dbc/hz -125 dbc/hz @ 1 khz -140 dbc/hz -140 dbc/hz warm up time to reach 1 x 10e-7 5 min @ 25c ref @ 1 hr frequency 5 min @ 25c ref @ 1 hr frequency frequency stability detailed tolerances temperature model stability versus : calibration type range code temperature ageing/day ageing/ 1 st year short term @ 25c dfo 20 -20 to 70c c1727 1 x 10 e -7 1.5 x 10 e -8 2 x 10 e -7 1 x 10 e -10 0.5 x 10 e -6 stability versus supply voltage 1 x 10 e -8 for vcc 5 % options code external voltage v 2.5 v 2.25 v 2 ppm, positive slope 1.65 v 1.5 v 2 ppm, positive slope ordering code type + option code + frequency + model code + voltage value example dfo 20-lhv 10 mhz c1727 h 0.45 5.1 0.40.1 1 2 4 5 3 20.30.1 20.30.1 7.62 7.62 15.24 h = 11mm
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