參數(shù)資料
型號: SM802108UMG
廠商: MICREL INC
元件分類: 時鐘產(chǎn)生/分配
英文描述: 156.25 MHz, OTHER CLOCK GENERATOR, QCC24
封裝: 4 X 4 MM, GREEN, QFN-24
文件頁數(shù): 8/11頁
文件大?。?/td> 457K
代理商: SM802108UMG
Micrel, Inc.
SM802108
January 2011
6
M9999-012111-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 = 50 to VDDO 2V
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
FOUT1
Output Frequency 1
156.25
MHz
FOUT2
Output Frequency 2
125
Ppm
Output ppm Variation
Crystal reference. Note 6
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)
125MHz
Integration Range (1.875MHz – 20MHz)
Integration Range (12kHz – 20MHz)
110
250
110
250
fs
Spurious Noise Components
6.25MHz
25MHz
-73
-58
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.
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