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PDF PL607041 Data sheet ( Hoja de datos )
| Número de pieza | PL607041 | |
| Descripción | HCSL Frequency Synthesizer | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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PL607041
ClockWorks® PCIe Quad Outputs
Ultra-Low Jitter, HCSL Frequency
Synthesizer
General Description
The PL607041 is a member of the ClockWorks® family of
devices from Micrel and provides an extremely low-noise
Spread-Spectrum clock for PCI Express requirements.
The device operates from a 3.3V or 2.5V power supply
and synthesizes four HCSL output clocks at 25MHz,
100MHz, 125MHz, and 200MHz. The PL607041 accepts a
25MHz crystal.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Features
25MHz fundamental crystal or reference input
Generates four HCSL clock outputs at 25MHz, 100MHz,
125MHz, and 200MHz
Spread spectrum for EMI reduction
2.5V or 3.3V operating range
Typical phase jitter @ 100MHz (1.5MHz to 10MHz):
320fs
Compliant with PCI Express Gen1, Gen2, and Gen3
Industrial temperature range (–40°C to +85°C)
RoHS and PFOS compliant
Available in 24-pin 4mm × 4mm QFN package
Applications
Servers
Storage systems
Switches and routers
Gigabit Ethernet
Set-top boxes/DVRs
Block Diagram
ClockWorks is a registered trademark of Micrel, Inc.
Ripple Blocker is a trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
April 1, 2014
Revision 1.2
[email protected] or (408) 955-1690
1 page  
Micrel, Inc.
Crystal Characteristics
Parameter
Mode of Oscillation
Frequency
Equivalent Series Resistance
(ESR)
Shunt Capacitor, C0
Correlation Drive Level
Condition
15pF load capacitance
PL607041
Min.
Typ.
Max.
Fundamental, Parallel Resonant
25
50
17
10 100
Units
MHz
Ω
pF
µW
AC Electrical Characteristics(6, 7)
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 VSS
Symbol Parameter
Condition
Min. Typ. Max. Units
FOUT
Output Frequency
25
100
125
MHz
200
FREF
FIN
Crystal Input Frequency
Reference Input Frequency
25 MHz
25 MHz
FIN
TR/TF
ODC
FIN Signal Amplitude
HCSL Output Rise/Fall Time
Output Duty Cycle
Internally AC-coupled
20% - 80%
0.9
150 300
48 50
VDD
450
52
VPP
ps
%
TSKEW
TLOCK
Tjit(Ø)
Output-to-Output Skew
PLL Lock Time
RMS Phase Jitter(8)
Cycle-to-Cycle Jitter
Note 7
100MHz
Integration Range (1.5MHz – 10MHz)
45 ps
20 ms
320 fs
30
ps,
peak
Notes:
6. All phase noise measurements were taken with an Agilent 5052B phase noise system.
7. Defined as skew between outputs at the same supply voltage and with equal load conditions; 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.
Spread Spectrum Characteristics
Parameter
Modulation Rate(9)
Condition
Min.
Typ.
31.6
Max.
Units
kHz
Modulation Magnitude(10)
Setting is -0.25%
Setting is -0.50%
-0.073 to -0.265
-0.136 to -0.383
0 to -0.250
0 to -0.500
+0.031 to -0.375
+0.078 to -0.589
%
%
Notes:
9. The modulation rate is created from the crystal frequency, divided by 792.
10. The typical modulation makes the output frequency sweep between the target frequency (0%) and the down-spread value (-0.25% or -0.5%). There
is process variation on the modulation magnitude and the smallest and largest possible modulation magnitude sweep ranges are listed in the table.
April 1, 2014
5 Revision 1.2
[email protected] or (408) 955-1690
5 Page 
Micrel, Inc.
PL607041
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
Micrel makes no representations or warranties with respect to the accuracy or completeness of the information 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 Micrel’s 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 property right.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2014 Micrel, Incorporated.
April 1, 2014
11 Revision 1.2
[email protected] or (408) 955-1690
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet PL607041.PDF ] | |
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