statek corporation 512 n. main st., orange, ca 92868 714-639-7810 fax: 714-997-1256 www.statek.com s y s t e m c e r t i f i c a t i o n i s o 9 0 0 1 LFXOtf oscillator 32.768 khz typical maximum dim inches mm inches mm a0.2566.500.2636.68 b0.1975.000.2045.18 c (sm1) 0.063 1.60 0.065 1.65 c (sm3/sm5) 0.067 1.70 0.073 1.85 d0.0551.400.0651.65 e0.0601.520.0701.78 pin connections 1. not connected (n) or enable/disable (t) 2. ground 3. output 4. v dd suggested land pattern dimensions description statek s 32.768 khz LFXOtf oscillator is designed for applications requiring low current consumption (as low as 600 na). it consist of a statek miniature tuning fork quartz crystal and a cmos compatible ic in a ceramic package. the ceramic packaged crystal used in the LFXOtf oscillator is pre-qualified before assembly through electrical tests and characterization over temperature features ultra-low power low aging (double hermetic seal) cmos output optional output enable/disable with tri-state low emi emission full military testing available high temperature option applications medical military & aerospace industrial controls instrumentation 10195 rev b low current consumption miniature surface mount crystal oscillator
statek corporation 512 n. main st., orange, ca 92868 714-639-7810 fax: 714-997-1256 www.statek.com 10195 rev b specifications specifications are typical at 25 o c unless otherwise noted. specifications are subject to change without notice. supply voltage 1 1.8 v to 5 v ( v dd ) current consumption see table 1 calibration tolerance 2 ?0 ppm ?0 ppm ?00 ppm frequency stability 3 follows that of a 32.768 khz tuning fork crystal aging 1 ppm/year typ ? ppm/year max shock 5,000 g, 0.3 ms, 1/2 sine vibration 20 g, 10 - 2000 hz swept sine operating temperature -10 o c to +70 o c (commercial) ranges -40 o c to +85 o c (industrial) -55 o c to +125 o c (military) +25 o c to +150 o c (high temperature) 1. available voltages: 1.8 v, 2.5 v, 3.0 v, 3.3 v, and 5.0 v at ?0% tolerance. 2. other tolerances available. 3. frequency stability over the temperature range based on the formula: -0.035 ppm/ o c 2 x(t - 25 o c) 2 absolute maximum ratings supply voltage v dd 0.5 v to 7 v storage temperature -55 o c to +125 o c process temperature 260 o c for 20 s how to order 32.768 khz LFXOtf oscillators/ultra low power blank = standard s = special frequency k = khz enable/disable option t or n termination blank = sm1 =gold plated (pb free) sm3 = solder dipped sm5 = solder dipped (pb free) operating temperature range c=-10 o c to +70 o c i =-40 o c to +85 o c m=-55 o c to +125 o c s=customer specified calibration tolerance @ 25 0 c (in ppm) 1 = 1.8v 2 = 2.5v 3 = 3.0v 4 = 3.3v 5 = 5.0v LFXOtf s n sm5 32.768k 30 i / , 4 v dd (v) i dd ( a) i dd ( a) no load 15 pf load 1.8 0.6 1.5 2.5 0.8 2.0 3.0 0.9 2.5 3.3 1.0 2.8 5.0 1.7 4.5 typical current consumption - table 1 the current consumption i dd under a capacitive load c l is higher than the current i 0 under no load by i dd = i 0 + f c l v dd , where f = 32.768 khz. enable/disable options (t/n) for the 32.768 khz LFXOtf, statek offers two enable/disable options: t and n. the t-version has a tri-state output and continues to run internally when the output is put into the high z state. so, the t-version offers very fast output recovery when the oscillator is re-enabled. the n-version does not have pin 1 connected internally and so has no enable/disable capability. electrical characteristics all parameters are measured at ambient temperature with a 10 m and 15 pf load with v dd 1.6 v to 5.5 v. parameter min typ max unit output voltage high v dd - 0.4 v v dd v output voltage low 0 0.4 v rise time (10%-90%) 100 ns fall time (10%-90%) 100 ns duty cycle 45 50 55 %
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