frequency control products type dfo 20 siii revision 03 checked ne date .18.10.2007 page xx stratum iii & iiie ocxo types dfo 20-kh (5 v) & dfo 20-lh (3.3 v) features 10 to 25 mhz stratum iiie compliant over -40 to 85c stratum iii compliant over -40 to 85c applications stratum iii & stratum iiie function dfo 20 vcc 1 output 2 gnd 3 n.c. 4 n.c. 5 type dfo 20-kh dfo 20-lh frequency range 10 to 25 mhz standard frequencies 12.8, 16.384, 19.44 20 & 25 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 -95 dbc/hz -95 dbc/hz (typical @ 12.8mhz) @ 10 hz -120 dbc/hz -120 dbc/hz @ 100 hz -140 dbc/hz -140 dbc/hz @ 1 khz -145 dbc/hz -145 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 after 30 days of operation type temperature model stability versus: overall holdover 24 hrs calibration range code temperature vcc 5 % ageing stability stability drift @ 25c telcordia gr-1244 core stratum iii/iiie or itu-t g.813 option 1 all types -20 to 70c cs3 0.28 ppm 1 x 10e-8 3.5 ppm/ 15 years 4.6 ppm/ 15 years 0.37 ppm 4 x 10e-8 5 x 10e-7 -40 to 85c es3 0 to 70c bs3e 1 x 10e-8 2.5 x 10e-9 3.5 ppm/ 15 years 4.6 ppm/ 15 years 12 x 10e-9 1 x 10e-9 5 x 10e-7 -40 to 85c es3e definitions 24 hours drift gr-1244-core 24 hours holdover mode over full temperature range and vcc 1 % (cs3 & es3), and vcc 0.25 % (bs3e) ordering code type + option code + frequency + model code + voltage value example dfo 20-lh 12.8 mhz bs3e 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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