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SM802105UMGR 데이터시트(PDF) 6 Page - Micrel Semiconductor

부품명 SM802105UMGR
상세설명  ClockWork 10GbE (156.25MHz, 312.5MHz), Ultra-Low Jitter, LVPECL Frequency Synthesizer
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제조업체  MICREL [Micrel Semiconductor]
홈페이지  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

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Micrel, Inc.
SM802105
April 2011
6
M9999-042111-A
hbwhelp@micrel.com or (408) 955-1690
AC Electrical Characteristics
(4, 5)
VDD = VDDO1/2 = 3.3V ±5% or 2.5V ±5%
VDD = 3.3V ±5%, VDDO1/2 = 3.3V ±5% or 2.5V ±5%
TA = −40°C to +85°C. RL = 50Ω to VDDO − 2V
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
FOUT1
Output Frequency 1
FSEL=1
156.25
MHz
FOUT2
Output Frequency 2
FSEL=0
312.5
MHz
Ppm
Output ppm Variation
Crystal reference. Note 6
−50
50
ppm
FREF
Reference Input Frequency
25
MHz
TR/TF
LVPECL Output Rise/Fall Time
20% – 80%
80
175
350
ps
ODC
Output Duty Cycle
48
50
52
%
TSKEW
Output-to-Output Skew
Within bank. Note 7
45
ps
TLOCK
PLL Lock Time
20
ms
Tjit(∅)
RMS Phase Jitter
(8)
156.25MHz
Integration Range (1.875MHz – 20MHz)
Integration Range (12kHz – 20MHz)
312.5MHz
Integration Range (1.875MHz – 20MHz)
Integration Range (12kHz – 20MHz)
110
250
110
250
fs
Spurious Noise Components
6.25MHz using 156.25MHz
12.5MHz using 312.5MHz
-80
-85
dBc
Notes:
5.
All phase noise measurements were taken with an Agilent 5052B phase noise system.
6.
Crystal tolerance at room less than
± 15ppm, over temp less than ±20ppm.
7.
Defined as skew between outputs at the same supply voltage and with equal load conditions and same frequency; Measured at the output
differential crossing points.
8.
Measured using 25MHz crystal as the input reference source. If using an external reference input, use a low phase noise source. With an external
reference, the phase noise will follow the input source phase noise up to about 1MHz.


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