ultra low power 32.768khz mems oscillator page 1 of 5 cmc208 - series r a l t r o n e l e c t r o n i c s ? 1 0 4 0 0 n . w . 3 3 rd s t ? m i a m i , f l o r i d a 3 3 1 7 2 ? u . s . a . phone: +1 - 305 - 593 - 6033 ? fax: +1 - 305 - 594 - 3973 ? e - mail: sales@raltron.com ? internet: http://www.raltron.com ultra low power: < 1 ? a fixed 32.768 khz no supply voltage external bypass capacitors required xtal replacement in 2.0 mm x 1.2 mm smd smd package 2.0 x 1.2 mm parameter symbol condition value unit min. typ. max. frequency nominal f 0 32.768 k hz supply voltage vs t a = - 10c to +70c t a = - 40c to +85c 1.2 1.5 3.63 3.63 v v core supply current is vs = 1 .8v , no load condition , t a = 25c vs = 3.63v max, t a = - 10c to +70c no load condition vs = 3.63v max, t a = - 40c to +85c no load condition is does not include output stage current or load. to derive total operating current( no load) ,add is+(0.065 ? a )(peak to peak output voltage swing ) 0.9 1.3 1.4 ?????? ? a ? ? a ? a output stage supply current is 0ut vs = 1.5v~3.63v max, t a = - 40c to +85c,no load condition 0.065 0.125 ? a/vpp operating temperature t a commercial industrial - 1 0 - 40 +70 +85 ? c c frequency tolerance f/f 0 after two reflows, at 25c vs=1.5v ~ 3.63v 20 ppm frequency stability f/f 0 t a = - 10c to +70c, vs=1.5~3.63v t a = - 40c to +85c, vs=1.5~3.63v t a = - 10c to +70c, vs=1.2~1.5v measured peak to peak, inclusive of initial tolerance at 25c, variations over operating temperature range, rated supply voltage and load 75 100 250 ppm ppm ppm power supply ramp t a = - 40c to +85c, 0 to 90% vs 100 ms start - up time t start t a = - 40c t a +50c, valid output t a = 50c t a +85c, valid output 180 300 450 ms ms electrical specifications
ultra low power 32.768khz mems oscillator 2 of 5 cmc208 - series r a l t r o n e l e c t r o n i c s ? 1 0 4 0 0 n . w . 3 3 rd s t ? m i a m i , f l o r i d a 3 3 1 7 2 ? u . s . a . phone: +1 - 305 - 593 - 6033 ? fax: +1 - 305 - 594 - 3973 ? e - mail: sales@raltron.com ? internet: http://www.raltron.com lvcmos parameter symbol condition value min typ. max unit output levels v oh vs= 1.5v ~ 3.63v. i oh = - 10 ? a , 15 pf 0.9 vs v v ol vs= 1.5v ~ 3.63v. i ol = 10 ? a, 15 pf 0.1v s v duty cycle dc 4 8 52 % rise/ fall time tr/ tf 10 - 90% vs, 15 pf load, vs=1.5v to 3.63v 10 - 90% vs, 5 pf load, vs1.62v 100 200 50 ns ns nano drive tm programmable reduced swing output parameter symbol condition value min typ. max unit output levels v oh dc bias programmable output voltage high range vs=1.5v~3.63v, i oh = - 0.2 ?? a, 10pf load see table 1 0.6 to 1.225 v v ol dc bias programmable output voltage low range vs=1.5v~3.63v, i oh = 0.2 ?? a, 10pf load see table 1 0.35 to 0.80 v duty cycle dc 48 52 % rise/ fall time tr/ tf 30 - 70%( v ol / v oh ), 10 pf load 200 ns ac - couple programmable output swing v sw vs= 1.5v ~ 3.63v, 10 pf load , i oh / i ol =0.2 ?? a this output is intended for a receiver that is ac - coupled, see table 1 0.20 to 0.80 v programmable output voltage swing tolerance t a = - 40c to +85c, vs=1.5~3.63v - 0.055 0.055 v period jitter rms j p cycles = 10000, t a = 25c, vs=1.5~3.63v 35 ns table1 . nanodrive tm output levels nanodrive tm v oh ( v ) v ol ( v ) swing ( mv ) d 26 1.2 0.6 60055 1.8v logic compatible d14 1.1 0.4 70055 1.8v logic compatible d74 0.7 0.4 30055 xtal compatible aa3 - - 30055 xtal compatible output characteristics
ultra low power 32.768khz mems oscillator 3 of 5 cmc208 - series r a l t r o n e l e c t r o n i c s ? 1 0 4 0 0 n . w . 3 3 rd s t ? m i a m i , f l o r i d a 3 3 1 7 2 ? u . s . a . phone: +1 - 305 - 593 - 6033 ? fax: +1 - 305 - 594 - 3973 ? e - mail: sales@raltron.com ? internet: http://www.raltron.com ? ? note: 1. oscillator output signal. when interfacing to an mcus xtal, the clk out is typically connected to the receiving ics x in pin. oscillator includes an internal driver. the output swing and operation is not dependent on capacitive loading. 2. connect to supply voltage 1.5vvs3.63v for operation over - 40c to +85c temperature range. under normal operation conditions , vs does not require external bypass/ decoupling capacitor(s). internal power supply filtering w ill reject more than 150mv p - p with frequency components through 10mhz. pin symbol function 1 nc no connect. this pin will not respond to any input signal. it can be left floating 2 gnd electrical ground 3 output output signal 1 4 vs supply voltage 2 mechanical dimensions and pin functioning
ultra low power 32.768khz mems oscillator 4 of 5 cmc208 - series r a l t r o n e l e c t r o n i c s ? 1 0 4 0 0 n . w . 3 3 rd s t ? m i a m i , f l o r i d a 3 3 1 7 2 ? u . s . a . phone: +1 - 305 - 593 - 6033 ? fax: +1 - 305 - 594 - 3973 ? e - mail: sales@raltron.com ? internet: http://www.raltron.com reflow profile recommended solder reflow p rofile temperature min preheat t smin 150c temperature max preheat t smax 200 c time (t smin to t smax ) t s 60 - 180 sec. temperature t l 217c peak temperature t p 260c ramp - up rate r up 3c/sec max. ramp - down rate r down 6c/sec max. time within 5c of peak temperature t p 10 sec time t[25c] to peak temperature t[25c] to peak 48 0 sec. time t l 60 - 150 sec. soldering mil - std - 883f, method 2003 moisture sensitivity level msl 1 at 260c temperature cycle jesd22, method a104 vibration mil - std - 883f, method 2007 mechanical shock mil - std - 883f, method 2002 storage temperature - 65 . +150c temp. [c] time [sec] t p t l t smax t smin ramp - up ramp - down critical zone t l to t p t[25c] to peak t s preheat t l t p reflow profile environmental
ultra low power 32.768khz mems oscillator 5 of 5 cmc208 - series r a l t r o n e l e c t r o n i c s ? 1 0 4 0 0 n . w . 3 3 rd s t ? m i a m i , f l o r i d a 3 3 1 7 2 ? u . s . a . phone: +1 - 305 - 593 - 6033 ? fax: +1 - 305 - 594 - 3973 ? e - mail: sales@raltron.com ? internet: http://www.raltron.com series supply voltage (v) frequency stability temp range (c ) output signal - output frequency (k hz) c m c208 12: vs=1.2v~3.6v 15: vs=1.5v~3.6v a: 75 ppm b: 100ppm c: 200ppm u: - 1 0~70 v: - 40~85 1: lvcmos nanodrive tm reduced swing output setting options a: ac - coupled d: dc - coupled 26:d26 14:d14 74:d74 3:aa3 see table 1 - 32.768 approvals eng. approval, date: sp, 07 / 21 / 2016 created by, date: sp, 07 /21 / 2016 revision: a ordering information
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