frequency control products type dfa s2 siii revision 04 checked ne date 08.04.2008 page xx 4 3 1 5.08 3.20.2 2.4 1.4 2.0 5.30.1 7.20.2 5.08 0.9 2 s t r a t u m i i i u l t r a m i n i a t u r e s u r f a c e m o u n t t c x o d f a s 2 - k h z ( 5 v ) & l h z ( 3 . 3 v ) features 5 to 52 mhz stratum iii compliant over - 40 to 85c up to 20 mhz sonet minimum clock compliant over -40 to 85c up to 52 mhz applications stratu m iii and smc function dfa s2 e / d 1 gnd 2 output 3 vcc 4 type dfa s2 - khz dfa s2 - lhz frequency range 5 to 20 mhz 20.1 to 52 mhz* standard frequencies 12.8, 16.384, 19.44, 20, 34.36 8*, 38.88* & 44.736* 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 45/55...55/45 % 45/55...55/4 5 % rise/fall times (10 to 90 %) 5 ns 5 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 1 high or open = enable, l ow = high z high or open = enable, low = high z frequency stability detailed tolerances [ ppm ] type temperature model stability versus: overall holdo ver 24 hrs calibration range code temperature vcc 5 % ageing stability stability drift @ 25c telcordia gr - 1244 core stratum iii or itu - t g.813 option 1 all types 0 to 50c as3 0.28 0.1 3 over 15 years 4.6 over 15 years 0.37 0.04 0.8 0 to 70c bs3 -20 to 70c* cs3 -40 to 85c* es3 telcordia gr - 253 core smc or itu - t g.813 option 2 all types 0 to 70c bsm 3.5 0.3 10 over 20 years 20 over 20 years 4.6 0.5 1 -40 to 85c esm definitions 24 hours drift gr-1244-core, gr-253-core or g.813 24 hours holdover mode over full temperature range and vcc 0.5 % ordering code type + option code + frequency + model code example dfa s2-lhz 19.44 mhz bs3 *all temperature range and stability combinations a re not available. please consult factory for availa bility pc board footprint
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