crystal oscillator NH37M28LK 1709d_NH37M28LK_e high precision oscillator (twin-ocxo) for fixed communication equipment base stations for system mobile communications high-end router synthesizer measuring instrument exchanger main application excellent temperature characteristics. supports wide temperature range. excellent holdover stability. frequency adjustment by digital control method (i 2 c control). (voltage contorol method (v cont ) is also possible.) features specifcations 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 *1 holdover condition after 7days operation. r amp rate: 10 c /1h. temp. condition range: 20 c window. model item NH37M28LK nominal frequency f nom (mhz) 10 supply voltage vcc (v) +5 load impedance c l (pf) 15 operating temperature range t opr (c) C40 to + 85 storage temperature range t str (c) C40 to + 85 power consumption p cc (w) at start max. 3.5 (typ. 3.0) when stable, at +25 c max. 1.2 frequency tolerance f/f nom at +25c, v cont = center, before shipment max. 2510 -9 frequency/temperature characteristics f/f at operating temperature range max. 0.210 C9 frequency/voltage coeffcient f/f v cc 5% max. 0.210 C 9 long-term frequency stability f/f based on frequency after 7 days operation max. 0.210 C 9 / day max. 5010 C 9 / year stabilization time (min.) time within specified frequency tolerance after power on at +25c, based on frequency after 60minutes operation. max. 5 / within 1010 C 9 hold over refer *1 typ. 1.0s / 8h frequency control method analog control digital control (i 2 c) frequency control range f/f v cont = +2.5v2.5v 0x800000 to 0x7fffff center : 0x000000 0.3 to 0.510 C 6 0.3 to 0.510 C 6 frequency change polarity positive linearity (%) max. 5 output voltage lvcmos v ol : max. +0.4 v v oh : min. +2.4 v symmetry (%) at (v oh + v ol ) / 2 45 to 55 specifcation number nsa3641a nsa3640a reference value dimensions we offer dedicated tool (charge) for evaluation of this product please specify the model name, frequency, and specifcation number when you order products. for further questions regarding specifcations, please feel free to contact us. 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 28.0 max 37.0 max 3.0 min 16.0 max tolerance 0.2 it might be printed manegement code to the bottom. holdover stability profile reference ambient temperatur e ambient temp. [c] time [h] 0 1 2 3 4 5 6 7 8 40 35 30 25 20 15 10
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