DSC1001. Low-Power Precision CMOS Oscillator. General Description. Features. Benefits. Block Diagram
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1 DSC.8~.V LowPower Precision CMOS Oscillator General Description The DSC is a silicon MEMS based CMOS oscillator offering excellent jitter and stability performance over a wide range of supply voltages and temperatures. The device operates from to 5MHz with supply voltages between.8 to. Volts and temperature ranges up to ºC to 5ºC. The DSC incorporates an all silicon resonator that is extremely robust and nearly immune to stress related fractures, common to crystal based oscillators. Without sacrificing the performance and stability required of today s systems, a crystalless design allows for a higher level of reliability, making the DSC ideal for rugged, industrial, and portable applications where stress, shock, and vibration can damage quartz crystal based systems. Available in industry standard packages, the DSC can be droppedin to the same PCB footprint as standard crystal oscillators. Block Diagram V DD Resonator PFD FracN PLL VCO Features Benefits Frequency Range: to 5MHz Exceptional Stability over Temperature o ± PPM, ±5 PPM, ±5 PPM Operating voltage o.7 to.6v Operating Temperature Range o Ext. Industrial ºC to 5ºC o Industrial ºC to 85ºC o Ext. Commercial ºC to 7ºC o Commercial ºC to 7ºC Low Operating and Standby Current o 5mA Operating (MHz) o 5uA Standby Ultra Miniature Footprint o.5 x. x.85 mm o. x.5 x.85 mm o 5. x. x.85 mm o 7. x 5. x.85 mm MILSTD 88 Shock and Vibration Resistant Pb Free, RoHS, Reach SVHC Compliant AECQ Reliability Qualified Pin for pin drop in replacement for industry standard oscillators Semiconductor level reliability, significantly higher than quartz Short mass production leadtimes Longer Battery Life / Reduced Power Compact Plastic package Cost Effective Applications Mobile Applications Consumer Electronics Portable Electronics DVR, CCTV, Surveillance Cameras Low Profile Applications Industrial Applications (pin) GND DSC Page MKQBPD569
2 DSC.8~.V LowPower Precision CMOS Oscillator Absolute Maximum Ratings Item Min Max Unit Condition Input Voltage. VDD+. V Junction Temp +5 C Storage Temp C Soldering Temp +6 C sec max. ESD HBM MM CDM 5 V Ordering Code DSC CE. T Family Package, Temp & Stability Freq. to 5MHz * See Ordering Information for details Tape/ Reel Recommended Operating Conditions Parameter Symbol Range Supply Voltage V DD.7.6V Load Z L R>KΩ, C 5pF Operating Temperature Option Option Option Option T to +5 C to +85 C to +7 C to +7 C Specifications (VDD =.8 to.v) T A =85 C unless otherwise specified Parameter Symbol Condition Min Typ Max Unit Frequency f Single Frequency 5 MHz Frequency Tolerance Δf Includes frequency variations due to initial tolerance, temperature and power supply voltage ±,±5,±5 ppm Aging Δf C ±5 ppm Supply Current, standby I DD T=5 C 5 ua Logic Levels logic high logic low V OH V OL ma ma.8*v DD.*V DD Startup Time t SU T=5 C.. ms Disable Time t DA ns Duty Cycle SYM 5 55 % Input Logic Levels Input logic high Input logic low V IH V IL.75*V DD.5* V DD Volts Volts DSC Page MKQBPD569
3 DSC.8~.V LowPower Precision CMOS Oscillator VDD =.8v Parameter Symbol Condition Min Typ Max Unit MHz C L =p 7MHz Supply Current, no load I DD R L = 7MHz T=5 C ma 5MHz Transition time VDD =.5v VDD =.v t R t F C L =5pF; T=5 C %/8%*V DD Jitter, Max Cycle to Cycle J CC F = MHz 6 Ps Parameter Symbol Condition Min Typ Max Unit MHz C L =p 7MHz Supply Current, no load I DD R L = 7MHz T=5 C ma 5MHz Transition time t R t F C L =5pF; T=5 C %/8%*V DD Jitter, Max Cycle to Cycle J CC F = MHz 5 ps Parameter Symbol Condition Min Typ Max Unit Supply Current, no load I DD MHz C L =p 7MHz R L = 7MHz T=5 C ma 5MHz.8. Transition time t R C L =5pF; T=5 C. t F %/8%*V DD.9 ns Jitter, Max Cycle to Cycle J CC F = MHz 5 ps Notes:. Absolute maximum ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated beyond these limits.. 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.. Measured over 5k clock cycles ns ns DSC Page MKQBPD569
4 (ns) (ns) (ns) (ns) Supply Current (ma) Supply Current (ma) DSC.8~.V LowPower Precision CMOS Oscillator Nominal Performance Characteristics 6 8 Vdd =.65V Ta = 5 C Supply Current pf 8pF 5pF 6 8 Vdd =.65V Ta = 5 C Supply Current pf 8pF 5pF.5 Vdd =.V C 5 C 85 C.5 Vdd =.V C 5 C 85 C Vdd =.8V C 5 C 85 C.5 Vdd =.8V C 5 C 85 C.5.5 DSC Page MKQBPD569
5 DSC.8~.V LowPower Precision CMOS Oscillator Waveform t R t F VOH VOL /f o t EN t DA VIH VIL Standby Function (pin ) Hi Level Open (no connect) Low Level (pin ) ON ON High Impedance Test Circuit I DD V DD.uF 5pF *V SD *VSD = Logic Level Input DSC Page 5 MKQBPD569
6 Temperature ( C) DSC.8~.V LowPower Precision CMOS Oscillator Board Layout (recommended) Solder Reflow Profile 6 C 7 C C 5 C 5 C C/Sec Max. 68 Sec Pre heat 8 min max C/Sec Max. Sec 65 Sec Reflow 6C/Sec Max. Cool Time 6 C refer to JSTDC RampUp Rate ( C to Peak Temp) C/Sec Max. Preheat Time 5 C to C 68 Sec Time maintained above 7 C 65 Sec Peak Temperature 556 C Time within 5 C of actual Peak Sec RampDown Rate 6 C/Sec Max. Time 5 C to Peak Temperature 8 min Max. DSC Page 6 MKQBPD569
7 DSC.8~.V LowPower Precision CMOS Oscillator Package Dimensions 7. x 5. mm Plastic Package External Dimensions Recommended Land Pattern* 7.±. [.76±.] 5.8 [.].6 [.].6 [.].5 [.8]. [.87]. [.8] 5.8 [.] o o o o o o. [.55] # # 5.±. [.97±.].85±.5 [.±.] # #. [.55]. [.8]. [.7] No. Pin Terminal GND VDD. [.8]. [.55] *Note: The center pad is not connected internally and should be left unconnected or tied to GND. units: mm [inch] 5. x. mm Plastic Package External Dimensions Recommended Land Pattern 5±. [.97±.].5 [.].5 [.]. [.8]. [.7]. [.]. [.8]. [.] # #.±. [.6±.] # #. [.7].9 [.5]. [.]. [.7].85±.5 [.±.] No. Pin Terminal GND VDD units: mm [inch] DSC Page 7 MKQBPD569
8 DSC.8~.V LowPower Precision CMOS Oscillator. x.5 mm Plastic Package External Dimensions Recommended Land Pattern.±.5 [.6±.]. [.8].9 [.5].9 [.5]. [.8]. [.9] CO.5 # #.5±.5 [.98±.] # #.9±.5 [.5±.].8±. [.±.]. [.8].9 [.5].85±.5 [.±.] No. Pin Terminal GND VDD units: mm [inch].5 x. mm Plastic Package External Dimensions Recommended Land Pattern.5±.5 [.98±.].65 [.65].65 [.65].7 [.8].7 [.8].85 [.] CO.5 # #.±.5 [.79±.] # #.65±.5 [.6±.].65±. [.6±.]. [.8].65 [.6].85±.5 [.±.] No. Pin Terminal GND VDD units: mm [inch] DSC Page 8 MKQBPD569
9 DSC.8~.V LowPower Precision CMOS Oscillator Ordering Information DSC PTS xxx.xxxx T Package (Plastic QFN) P=A: 7.x5.mm P=B: 5.x.mm P=C:.x.5mm P=D:.5x.mm PART NUMBERING GUIDE Temperature Stability Frequency Packing Option T=C: o ~ +7 o C T=E: o ~ +7 o C T=I: o ~ +85 o C T=L: o ~ +5 o C S=: ±5ppm S=: ±5ppm S=5: ±ppm XXX.XXXX Blank: Tubes T: Tape & Reel Example: DSCCE.T The example part number above is a.mhz oscillator in Plastic.x.5mm package, with ±5ppm stability over an operating temperature of to +7 o C, shipped in Tape and Reel. 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 merchantability 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 lifesupport systems where a malfunction or failure may reasonably be expected to result in significant injury to the user. The inclusion of Discera s product in a lifesupport systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Discera against all charges. DISCERA, Inc. 96 Concourse Drive, San Jose, California 95 USA Phone: + (8) 86 Fax: + (8) sales@discera.com DSC Page 9 MKQBPD569
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