参数资料
型号: MK2069-03GITR
元件分类: 时钟产生/分配
英文描述: 160 MHz, OTHER CLOCK GENERATOR, PDSO56
封装: 6.10 MM, 0.50 MM PITCH, TSSOP-56
文件页数: 18/19页
文件大小: 339K
代理商: MK2069-03GITR
VCXO-Based Clock Translator with High Multiplication
MDS 2069-03
J
8
Revision 030906
Integrated Circuit Systems, Inc. l 525 Race Street, San Jose, CA 95126 l tel (408) 295-9800 l
MK2069-03
VCXO Gain (KO) vs. XTAL Frequency
Example Loop Filter Component Value
Notes:
1) This filter configuration assures a passband ripple compliant with Bellcore GR-1244-CORE to satisfy
wander transfer requirements (<0.2 dB ripple is required) of a network node. It can be used following a
system synchronizer such as the MT9045 to provide clock jitter attenuation while maintaining Stratum 3
compliance. A 155.52 MHz TCLK output generated with the VCXO PLL configuration will be OC-3 and OC-12
timing jitter compliant.
2) This is a reduced cost and size variant of the above filter, due to the decreased size of CS. It is useful when
GR-1244-CORE compliance is not needed.
3) This configuration is used to generate a DS3 clock of 44.736 MHz at the TCLK output. This configuration
is GR-1244-CORE compliant when used following a system synchronizer.
Loop Filter Capacitor Type
Loop filters must use specific types of capacitors.
Recommendations for these capacitors can be found at
10
20
1 5
25
30
2000
3000
4000
5000
6000
1000
C rystal F requ e ncy, M H z
VC
XO
G
a
in
(
K
O
),
H
z
p
e
r
V
o
lt
Phase
Detector
Frequency
Xtal
Freq
(MHz)
SV
Div
VCLK
(MHz)
FV Div x
FPV Div
RSET
RS
CS
CP
Loop
BW
(-3dB)
Loop
Damp.
Passband
Peaking
Note
8 kHz
19.44
1
19.44
2430
1 M
560 k 1 F
4.7 nF
22 Hz
4.0
0.15dB at 1Hz
1
8 kHz
19.44
1
19.44
2430
1 M
560 k 0.1 F 4.7 nF 27 Hz
1.4
1.2dB at 6Hz
2
8 kHz
22.368
1
22.368
2796
1 M
680 k 1 F
4.7 nF
20 Hz
4.5
0.12dB at 1Hz
3
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