___________________________________________________ ___________________________________________________ _______________________ _________________ dsc1101 | dsc1121 page 1 mk -q-b-p-d-1104 10 - 01 -6 low-jitter precision cmos oscillator dsc1101 dsc1121 general description the dsc 11 01 & dsc1121 series of high performance oscillators utilizes a proven silicon mems technology to provide excellent jitter and stability over a wide range of supply voltages and temperatures. by eliminating the need for quartz or saw technology, mems oscillators significantly enhance reliability and acceler ate product development , while meeting stringent clock performance criteria for a variety of communications, storage, and networking applications. dsc1101 has a standby feature allowing it to completely power-down when en pin is pulled low; whereas for dsc1121, only the outputs are disabled when en is low. both oscillators are available in industry standard packages, including the small 3.2x2.5 mm 2 , and are drop - in r eplacements for standard 4-pin cmos quartz crystal oscillators. block diagram output enable modes en pin dsc1101 dsc1121 high output active output active nc output active output active low standby output disabled features low rms phase jitter: <1 ps (typ) high stability: 10 , 25, 50 ppm wide temperature range o automotive : -55 to 125 c o ext. industrial: -40 to 105 c o industrial: -40 to 85 c o ext. commercial: -20 to 70 c high supply noise rejection: -50 dbc short lead time: 2 weeks wide freq. range: 2.3 to 170 mhz small industry standard footprints o 2.5x2.0, 3.2x2.5, 5.0x3.2, & 7.0x5.0 mm excellent shock & vibration immunity o qualified to mil-std- 883 high reliability o 20x better mtf than quartz oscillators low current consumption supply range of 2.25 to 3.6 v standby & output enable function lead free & rohs compliant applications storage area networks o sata, sas, fibre channel passive optical networks o epon, 10g-epon, gpon, 10g- pon ethernet o 1g, 10gbase-t/kr/lr/sr, and fcoe hd/sd/sdi video & surveillance pc i express displayport downloaded from: http:///
___________________________________________________ ___________________________________________________ _______________________ _________________ dsc1101 | dsc1121 page 2 mk -q-b-p-d-1104 10 - 01 -6 dsc1101 low -jitter precision cmos oscillator dsc1121 absolute maximum ratings item min max unit condition supply voltage -0.3 +4.0 v input voltage -0.3 v dd +0.3 v junction temp - +150 c storage temp - 55 +150 c soldering temp - +260 c 40 sec max. esd hbm mm cdm - 4000 400 1500 v ordering code note: 1000+ years of data retention on internal memory specifications 1. pin 6 v dd should be filtered with 0.1uf capacitor. 2. t su is time to 100ppm of output frequency after v dd is applied and outputs are enabled. 3. output waveform and test circuit figures below define the parameters. 4. output is enabled if pad is floated or not connected. parameter condition min. typ. max. unit supply voltage 1 v dd 2.25 3.6 v supply current i dd en pin low C output is disabled dsc1101 dsc11 21 20 0.095 22 ma frequency stability ext comm. & ind. only all temp ranges all temp ranges f includes frequency variations due to initial tolerance, temp. and power supply voltage 10 25 50 ppm aging f 1 year @ 25c 5 ppm startup time 2 t su t= 25c 5 ms input logic levels input logic high input logic low v ih v il 0.75xv dd - - 0.25xv dd v output disable time 3 t da 5 ns output enable time t en dsc1101 dsc1121 5 20 ms ns enable pull- up resistor 4 pull-up resistor exist 40 k cmos output supply current 4 i dd output is enabled c l = 15 pf , f 0 =1 25 mhz 31 35 ma output logic levels output logic high output logic low v oh v ol i= 6ma 0.9xv dd - - 0.1xv dd v output transition time 3 rise time fall time t r t f 20% to 80% c l =15pf 1.1 1.3 2 2 ns frequency f 0 all temp range except auto auto temp range 2.3 170 100 mhz output duty cycle sym 45 55 % period jitter j per fout=125mhz 3 ps rms integrated phase noise j ph 200khz to 20mhz @ 125mhz 100khz to 20mhz @ 125mhz 12khz to 20mhz @ 125mhz 0.3 0.38 1. 7 2 ps rms dsc11 125.0000 freq (mhz) 125.0000 0 enable modes 0: enable/standby 2: enable/disable - packing t: tape & reel : tube 1 c i 5 package a: 7.0x5.0mm b: 5.0x3.2mm c: 3.2x2.5mm d: 2.5x2.0 mm n: 7.0x5.0mm (no center pad) temp range e: -20 to 70 i: -40 to 85 l: -40 to 105 m: -55 to 125 stability 1: 50ppm 2: 25ppm 5: 10ppm t downloaded from: http:///
___________________________________________________ ___________________________________________________ _______________________ _________________ dsc1101 | dsc1121 page 3 mk -q-b-p-d-1104 10 - 01 -6 dsc1101 low -jitter precision cmos oscillator dsc1121 nominal performance parameters (unless specified otherwise: t=25 c, v dd =3.3 v) phase jitter (integrated phase noise) power supply rejection ratio output waveform typical termination scheme 0.0 0.5 1.0 1.5 2.0 2.5 0 200 400 600 800 1000 phase jitter (ps rms) low -end of integration bw: x khz to 20 mhz 25mhz-cmos 50mhz-cmos 106mhz-cmos 125mhz-cmos - 80 - 70 - 60 - 50 - 40 - 30 - 20 - 10 0 0.1 1 10 100 1000 10000 rejection (dbc) supply noise frequency (khz) 50 - mv 100 - mv v dd 0.1uf 2 3 4 5 6 c l cmos load capacitance v oh v ol v il 1/f o output enable t da t en t f t r v ih downloaded from: http:///
___________________________________________________ ___________________________________________________ _______________________ _________________ dsc1101 | dsc1121 page 4 mk -q-b-p-d-1104 10 - 01 -6 dsc1101 low -jitter precision cmos oscillator dsc1121 test circuit board layout (recommended) solder reflow profile 0.1uf v dd 15pf i dd v da 4 1 2 3 msl 1 @ 260 c refer to jstd-020c ramp-up rate (200 c to peak temp) 3 c/sec max. preheat time 150 c to 200 c 60 -180 sec time maintained above 217 c 60 -150 sec peak temperature 255-260 c time within 5 c of actual peak 20 -40 sec ramp-down rate 6 c/sec max. time 25 c to peak temperature 8 min max. 60 -150 sec 20 - 40 sec 60 -180 sec 8 min max pre heat reflow cool time temperature ( c) 3c/sec max. 6c/sec max. 200 c 217 c 150 c 25 c 260 c 3c/sec max. 60 -150 sec 20 - 40 sec 60 -180 sec 8 min max pre heat reflow cool time temperature ( c) 3c/sec max. 6c/sec max. 200 c 217 c 150 c 25 c 260 c 60 -150 sec 20 - 40 sec 60 -180 sec 8 min max pre heat reflow cool time temperature ( c) 3c/sec max. 6c/sec max. 200 c 217 c 150 c 25 c 260 c 3c/sec max. 2 3 4 5 6 1 downloaded from: http:///
___________________________________________________ ___________________________________________________ _______________________ _________________ dsc1101 | dsc1121 page 5 mk -q-b-p-d-1104 10 - 01 -6 dsc1101 low -jitter precision cmos oscillator dsc1121 package dimensions 7.0 x 5.0 mm plastic package 1 2 3 4 6 5 70.10 [0.2760.004] 50.10 [0.1970.004] 1 2 3 4 6 5 1.10.01[0.430.004] 3.7 [0.146] ref 0.850.05 1.4 [0.055] 2.6 [0.102] 1 3 4 via to power trace via to ground plane no. pin terminal 1 enable 2 n/c 3 ground 4 5 n/c 6 vdd out 6 external dimensions units: mm [ inches] recommended solder pad layout units: mm [ inches] 2.54 [0.100] 1.40.10 [0.0550.004] 1.8 [0.071] 2.8 [0.110] 1.4 [0.055] 5.08 [0.100] pad tie to gnd 5.0 x 3.2 mm plastic package 1 2 3 4 6 5 50.05 [0.1970.002] 3.20.05 [0.1260.002] 1 2 3 4 6 5 1.27 [0.050] 0.70.1 [0.0790.002] 1.2 [0.047] ref 0.850.05 0.64 [0.025] 1.1 [ 0.043] 1.2 [0.047] ref 1 3 4 via to power trace via to ground plane no. pin terminal 1 enable 2 n/c 3 ground 4 5 6 vdd out n/c 6 external dimensions units: mm [ inches] recommended solder pad layout units: mm [ inches] 0.640.05 2.54 [0.100] downloaded from: http:///
___________________________________________________ ___________________________________________________ _______________________ _________________ dsc1101 | dsc1121 page 6 mk -q-b-p-d-1104 10 - 01 -6 dsc1101 low -jitter precision cmos oscillator dsc1121 3.2 x 2.5 mm plastic package 1 2 3 4 6 5 3.20.05 [0.1260.002] 2.50.05 [0.0980.002] 1 2 3 4 6 5 0.50.05 [0.1980.002] 0.90.05 [0.0350.002] 1.05 [0.041] 0.70.1 [0.0790.002] 0.1[0.004] ref 0.9 [0.035] ref 0.850.05 0.9 [0.035] 1 [ 0.039] 0.9 [0.035] ref 1 3 4 via to power trace via to ground plane no. pin terminal 1 enable 2 n/c 3 ground 4 5 n/c 6 vdd out 6 external dimensions units: mm [ inches] recommended solder pad layout units: mm [ inches] 2.1[0.083] 2.5 x 2.0 mm plastic package 1 2 3 4 6 5 2.50.05 [0.0980.002] 2.00.05 [0.0790.002] 1 2 3 4 6 5 0.250.05 [0.0990.002] 0.650.05 [0.0260.002] 0.825 [0.032] 0.70.1 [0.0790.002] 0.7650.1 0.535 ref 0.6 ref 0.70.1 [0.0790.002] 0.850.05 0.650.05 [0.0260.002] 0.85 0.7 ref 1 2 3 4 5 6 via to power trace via to ground plane no. pin terminal 1 enable 2 n/c 3 ground 4 5 n/c 6 vdd out external dimensions units: mm [ inches] recommended solder pad layout units: mm [ inches] 1.65[0.064] downloaded from: http:///
___________________________________________________ ___________________________________________________ _______________________ _________________ dsc1101 | dsc1121 page 7 mk -q-b-p-d-1104 10 - 01 -6 dsc1101 low -jitter precision cmos oscillator dsc1121 7.0 x 5.0 mm plastic package (no center pad) 1 2 3 4 6 5 70.10 [0.2760.004] 50.10 [0.1970.004] 1 2 3 4 6 5 1.10.01[0.430.004] 3.7 [0.146] ref 0.850.05 1.4 [0.055] 2.6 [0.102] 1 3 4 via to power trace via to ground plane no. pin terminal 1 enable 2 n/c 3 ground 4 5 n/c 6 vdd out 6 external dimensions units: mm [ inches] recommended solder pad layout units: mm [ inches] 2.54 [0.100] 1.40.10 [0.0550.004] 1.4 [0.055] 5.08 [0.100] disclaimer: discera makes no warranty of any kind, express or implied, with regard to this material, including, but not limited to, the implied warranties of merchantabi lity and fitness for a particular purpose. discera reserves the right to make changes without further notice to materials described herein. discera does not assume any liability arising from the application or use of any product or circuit described herein. discera does not authorize its products for use a critical components in life-support systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. the inclusion of disceras product in a life -support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies discera against all charges. discera, inc. 1961 concourse drive san jose, california 95131 usa phone: +1 (408) 432-8600 fax: +1 (408) 432-8609 email: sales@discera.com www.discera.com downloaded from: http:///
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