crystal oscillator - 4 - NH37M28LK 1604a_NH37M28LK_e high precision oscillator (twin-ocxo) for fixed communication equipment base stations for system mobile communications measuring instrument synthesizer exchanger high-end router main application excellent temperature characteristics. supports wide temperature range. (?40 to +85c). excellent holdover stability (typ. 1s/8h). frequency adjustment by digital control method (i2c control). (voltage contorol method (v cont ) is also possible.) features dimensions specifcations model item measurement condition NH37M28LK nominal frequency (mhz) 10 supply voltage [v cc ] (v) +5.0 5 % power consumption (w) at start typ. 3.0 (max. 3.5) when stable (+25 c) max. 1.2 output voltage lvcmos (v ol max. 0.4 v, v oh min. 2.4 v) symmetry (%) at 1/2 v out 45 to 55 load impedance (pf) 15 operating temperature range (c) ?40 to +85 storage temperature range (c) ?40 to +85 stabilization time stabilization time (frequency stability) within 10 10 ?9 after power on at +25c , based on frequency after 60minutes operation. max. 5 minutes long-term frequency stability based on frequency after 7 days operation max. 0.210 ?9 /day max. 5010 ?9 /year frequency/temperature characteristics ?40 to +85 c max. 0.210 ?9 hold over after 7days operation, 20c window in operating temp. range. 8h period. *1 typ. 1.0s/8h frequency/voltage coeffcient v cc +5 v 5 % max. 0.210 ?9 frequency control range *2 0.3 to 0.5 10 ?6 frequency change polarity frequency change polarity positive linearity max. 5% phase noise (at 10mhz) offset frequency dbc/hz offset frequency dbc/hz 1 hz typ. C83 1k hz typ. C152 10 hz typ. C110 10k hz typ. C157 100 hz typ. C135 100k hz typ. C160 reference value please specify the model name, frequency, and specification number when you order products. for further questions regarding specifcations, please feel free to contact us. frequency control method voltage control (v cont ) digital control (i2c control) control range 0 to 5.0v 0x800000 to 0x7fffff specifcation number nsa3641a nsa3640a *2 specifcation number *1 holdover condition holdover stability reference ambient temp. profile ambient temp. [c] time [h] 0 1 2 3 4 5 6 7 8 40 35 30 25 20 15 10 mm max. 37.0 max. 28.0 stand off >&4point>' 0 7.62 10.16 12.70 #3 #1 #10 #4 17.80.3 15.240.30 25.40.3 17.780.30 #5 #7 #8 #9 #6 5.08 2.54 #2 5?0.450.15 max.16.0 min.3.0 0.65 5?0.800.15 pin connection s #1 #2 #3 #4 #5 #6 v cont / scl(i2c) * dnc(don't connect)/ sda(i2c) * v cc output dnc(don't connect) #7 dnc(don't connect) #8 dnc(don't connect) #9 dnc(don't connect) #10 gnd dnc(don't connect) to le ra nc e 0 .2 pi n numb er is no t pr in te d *n sa 36 41 a : v cont , dn c ns a3 64 0a : scl, sd a after 7days operation. r amp rate: 10 c /1h. standby time: each 0.5h. temp. condition range: 20 c window in operating temp. range.
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