all rights reserved. no part of this document may be copied or reproduced in any form without the prior written permission of micrel , inc. micrel in c. may update or make changes to the contents, products, programs or services described at any time without notice. this document neither states nor implies any kind of warrant y, including, but not limited to implied warranties of merchantability or fitness for a particular use. page 1 dsc1 028 2. 8 v low - power cmos oscillator mk - q - b - p - d - 031809 - 0 3 - 7 general description the dsc1028 is a 2. 8 v fixed frequency mems based puresilicon? o scillator . it can be factory programmed to any frequency from 1 to 150mhz . the dsc1028 incorporates an all silicon resonator that is extremely robust and nearly immun e to stress related fractures, common to crystal based oscillators. without sacrificing the performance and stability required of todays systems, a crystal - less design allows for a higher level of reliability, making the dsc1028 ideal for rugged , industr ial , and portable applications where stress, shock, and vibration can damage quartz crystal based systems . available in industry standard packages , the dsc1028 can be dropped - in to the same pcb footprint as standard crystal oscillators. block diagram features ? frequency range: 1 to 150mhz ? exceptional stability over temperature o 25 ppm, 50 ppm ? operating voltage o 2.6 to 3.0v ? operating temperature range o industrial - 40oc to 85oc o ext. commercial - 20oc to 70oc o commercial 0oc to 70oc ? low operating and sta ndby current o 3 ma operating (40mhz) o 1ua standby ? ultra min i ature footprint o 2.5 x 2.0 x 0.85 mm o 3.2 x 2.5 x 0.85 mm o 5.0 x 3.2 x 0.85 mm o 7 .0 x 5 . 0 x 0.85 mm ? excellent s hock and vibration resistance ? lead free, rohs & reach svhc c ompliant benefits ? pin for pin d rop in replacement for industry standard oscillators ? semiconductor level reliability, significantly higher than quartz ? short mass production lead - times ? longer battery life / reduced power ? compact plastic package ? cost effecti ve applications ? mobile applications ? consumer electronics ? portable electronics ? ccd clock for vtr cameras ? low profile applications ? industrial standby# pfd vco frac - n pll resonator output v dd gnd (pin1) standby# pfd vco frac - n pfd vco frac - n pll resonator output v dd gnd (pin1)
all rights reserve d. no part of this document may be copied or reproduced in any form without the prior written permission of micrel , inc. micrel in c. may update or make changes to the contents, products, programs or services described at any time without notice. this do cument neither states nor implies any kind of warrant y, including, but not limited to implied warranties of merchantability or fitness for a particular use. page 2 mk - q - b - p - d - 031809 - 0 3 - 7 dsc1028 2.8 v low - power cmos oscillator absolute maximum ratings 1 item min. max unit condition input voltage - 0.3 vdd+0.3 v junction temp - +150 c storage temp - 55 +150 c so ldering temp - +260 c 40 sec max. esd hbm mm cdm - 2000 200 500 v ordering code recommended operating conditions specifications notes: 1. absolute maximum ratings are those values beyond which the safety of the device ca nnot be guaranteed. the device should not be operated beyond these limits. 2. t su is time to stable output frequency after v dd is applied. t su and t en (after en is asserted) are identical values. 3. s ee typical cycle to cycle jitter graph for frequency dependence. parameter symbol range supply voltage v dd 2.6 to 3.0v output load z l r>10k , c15pf operating temperature option 1 option 2 option 3 t - 40 ? +85 c - 20 ? +70 c 0 ? +70 c parameter symbol condition min. typ. max. unit frequency f 0 single frequency 1 150 mhz frequency tolerance option 1 option 2 option 3 f - 40c to +85c - 20c to +70c 0c to +70c 25,50 25,50 25,50 ppm supply current, no load i dd c l =0p r l = t= 25 c 1 to 40mhz 40 to 80mhz 80 to 125mhz 125 to 150mhz 3 4 5 6 10 ma supply current, standby i dd t=25c 1.0 ua output logic levels output logic high output logic low v oh v ol c l =15pf 0.8*v dd - - 0.2*v dd volts output transition time rise time fall time t r t f c l =15pf; t= 25c 20%/80%*v dd 1.3 1.3 2 2 ns output startup time 2 t su t= 25c 1.5 3 m s output disable time t da 20 100 ns output duty cycle sym 45 55 % input logic levels input logic high input logic low v ih v il 0.75*v dd - - 0.25* v dd volts jitter, cycle to cycle j cc f = 100mhz 3 95 ps dsc1028 0 32.0000 family output freq 1.0 to 1 5 0 mhz ce1 package, temp & stability - t tape/ reel * see ordering information for details
all rights reserve d. no part of this document may be copied or reproduced in any form without the prior written permission of micrel , inc. micrel in c. may update or make changes to the contents, products, programs or services described at any time without notice. this do cument neither states nor implies any kind of warrant y, including, but not limited to implied warranties of merchantability or fitness for a particular use. page 3 mk - q - b - p - d - 031809 - 0 3 - 7 dsc1028 2.8 v low - power cmos oscillator nominal performance characteristics 2.8v characteristics supply current 0 4 8 12 16 0 50 100 150 frequency (mhz) supply current (ma) 1pf 8pf 15pf ta = 25c standby current 0 0.2 0.4 0.6 0.8 1 0 50 100 150 frequency (mhz) standby current (a) -40c 25c 85c rise time 0 0.5 1 1.5 2 0 50 100 150 frequency (mhz) rise time (ns) -40c 25c 85c fall time 0 0.5 1 1.5 2 0 50 100 150 frequency (mhz) fall time (ns) -40c 25c 85c period jitter 0 10 20 30 40 0 50 100 150 frequency (mhz) rms jitter (ps) 25c cycle to cycle jitter 0 50 100 150 200 0 50 100 150 frequency (mhz) jitter (ps) 25c
all rights reserve d. no part of this document may be copied or reproduced in any form without the prior written permission of micrel , inc. micrel in c. may update or make changes to the contents, products, programs or services described at any time without notice. this do cument neither states nor implies any kind of warrant y, including, but not limited to implied warranties of merchantability or fitness for a particular use. page 4 mk - q - b - p - d - 031809 - 0 3 - 7 dsc1028 2.8 v low - power cmos oscillator output waveform standby function standby# (pin 1) output (pin 3) hi level ou tput on open (no connect) output on low level high impedance test circuit v oh v ol v il 1/f o output standby# t da t en t f t r v ih 0.01uf v dd 15pf i dd *v sd 4 1 2 3 *v sd = standby# logic level input
all rights reserve d. no part of this document may be copied or reproduced in any form without the prior written permission of micrel , inc. micrel in c. may update or make changes to the contents, products, programs or services described at any time without notice. this do cument neither states nor implies any kind of warrant y, including, but not limited to implied warranties of merchantability or fitness for a particular use. page 5 mk - q - b - p - d - 031809 - 0 3 - 7 dsc1028 2.8 v low - power cmos oscillator board layout (recommended) solder reflow profile package dimensions 7 .0 x 5 . 0 mm plastic package msl 1 @ 260 c refer to jstd - 020c ramp - up rate (200 c to peak temp) 3 c/sec max. pre heat 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. pin terminal vdd standby# output gnd #1 #2 #3 #4 7.00.10 [0.2760.004] 5.00.10 [0.1970.004] external dimensions #4 #3 5.08 [0.2] #2 #1 1.2 [0.047] 1. 4 [0.055] 0.850.05 [0.0330.002] recommended land pattern* 1.4 [0.055] 1.4 [0.055] 5.08 [0.200] units: mm [inch] no. 4 1 3 2 0. 2 [0.008] 2.6 [0.102] 2.6 [0.102] 0.2 [0.008] 2. 2 [0.087] 3. 5 [0.138] o o o o o o 0. 2 [0.008] * note: the center pad is not connected internally and should be left un - conn ected or tied to gnd. 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.
all rights reserve d. no part of this document may be copied or reproduced in any form without the prior written permission of micrel , inc. micrel in c. may update or make changes to the contents, products, programs or services described at any time without notice. this do cument neither states nor implies any kind of warrant y, including, but not limited to implied warranties of merchantability or fitness for a particular use. page 6 mk - q - b - p - d - 031809 - 0 3 - 7 dsc1028 2.8 v low - power cmos oscillator 5.0 x 3.2 mm plastic package 3.2 x 2.5 mm plastic package pin terminal vdd standby# output gnd 0.850.05 [0.0330.002] recommended land pattern #1 #2 #3 #4 3.20.05 [0.1260.002] 2.50.0 5 [0.0980.002] #4 #3 #2 #1 0.80.1 [0.0310.004] 0.90.05 [0.0350.002] co.25 1.0 [0.039] 0.9 [0.035] 2.1 [0.083] no . 4 1 3 2 2.1 [0.083] external dimensions units: mm [inch] 0.9 [.035] 0.9 [0.035] 0 .2 [0.008] pin terminal vdd standby# output gnd #1 #2 #3 #4 50.10 [0.1970.004] 3.20.10 [0.1260.004] external dimensions #4 #3 2.54 [0.100] #2 #1 0.9 [0.035] 1.2 [0.047] 0.850.05 [0.0330.002] recommended land pattern 1.1 [0.043] 1.2 [0.047] 2.54 [0.100] units: mm [inch] no. 4 1 3 2 0. 2 [0.008] 0. 1 [0.004] 2.1 [0.083] 1.2 [0.047] 0. 1 [0.004]
all rights reserve d. no part of this document may be copied or reproduced in any form without the prior written permission of micrel , inc. micrel in c. may update or make changes to the contents, products, programs or services described at any time without notice. this do cument neither states nor implies any kind of warrant y, including, but not limited to implied warranties of merchantability or fitness for a particular use. page 7 mk - q - b - p - d - 031809 - 0 3 - 7 dsc1028 2.8 v low - power cmos oscillator 2 .5 x 2.0 mm plastic package ordering inf ormation dsc1028 pts C xxx.xxxx t part numbering guide package (plastic qfn) temperature stability frequency packing option p=a: 7.0x5.0mm p=b: 5.0x3.2mm p=c: 3.2x2.5mm p=d: 2 .5 x2. 0 mm t=c : 0 o ~ +70 o c t=e : - 20 o ~ +70 o c t=i : - 40 o ~ +85 o c s=1: 50ppm s=2: 25ppm xxx.xxxx (4 decimal places) blank: tubes - t: tape & reel example: dsc1028 ce1 C 123.0000t the example part number above is a 123.0000mhz oscillator in plastic 3.2x2.5mm package, with 50ppm stability over an operating temperatu re of - 20 to +70 o c, shipped in tape and reel. the reel size (7 or 13 diameter) will be determined by the factory based on quantity. disclaimer: micrel makes no representations or warranties with respect to the accuracy or completeness of the informat ion furnished in this data sheet. this information is not intended as a warranty and micrel does not assume responsibility for its use. micrel reserves the right to change circuitry, specifications and descriptions at any time without notice. no license, whether express, implied, arising by estoppel or otherwise, to any intellectual property rights is granted by this document. except as provided in micrels terms and conditions of sale for such products, micrel assumes no liability whatsoever, and micrel disclaims any express or implied warranty relating to the sale and/or use of micrel products including liability or warranties relating to fitness for a particular purpose, merchantability, or infringement of any patent, copyright or other intellectual pr operty right. micrel , inc. 2180 fortune drive , san jose, california 95131 usa phone: +1 (408) 944 - 0800 fax: +1 (408) 474 - 1000 email: hbwhelp @ micrel .com www.micrel.com pin terminal vdd standby# output gnd 0.850.05 [0.0330.002] recommended land pattern #1 #2 #3 #4 2.50.05 [0.0980.002] 2.00.05 [0.0790.002] #4 #3 #2 #1 0.650.10 [0.0260.004] 0.650.05 [0.0260.002] co.25 0.85 [0.033] 0.6 5 [0.026] 0.7 [0.028] 1.65 [0.065] no . 4 1 3 2 0.7 [0.028] 1.65 [0.065] external dimensions units: mm [inch] 0. 2 [0.008]
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