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SM802105 Scheda tecnica(PDF) 3 Page - Micrel Semiconductor

Il numero della parte SM802105
Spiegazioni elettronici  ClockWork 10GbE (156.25MHz, 312.5MHz), Ultra-Low Jitter, LVPECL Frequency Synthesizer
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Produttore elettronici  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

SM802105 Scheda tecnica(HTML) 3 Page - Micrel Semiconductor

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Micrel, Inc.
SM802105
April 2011
3
M9999-042111-A
hbwhelp@micrel.com or (408) 955-1690
Pin Description (Continued)
Pin Number
Pin Name
Pin Type
Pin Level
Pin Function
5, 11, 16, 18
TEST
Factory Test pins, Do not connect anything to these pins.
1
VDD
PWR
Core Power Supply
13, 14, 15
VSS
PWR
Core Power Supply Ground
17
VDDO1
PWR
Power Supply for Output Bank 1
21
VSSO1
PWR
Power Supply Ground for Output Bank 1
8
REF_IN
I, (SE)
LVCMOS
Reference Clock Input
9
XTAL_IN
I, (SE)
12pF crystal
Crystal Reference Input, no load caps needed.
See Fig. 5.
10
XTAL_OUT
O, (SE)
12pF crystal
Crystal Reference Output, no load caps needed.
See Fig. 5.
6
FSEL
I, (SE)
LVCMOS
Frequency Select, 1 = 156.25MHz, 0 = 312.5MHz,
45KΩ pull-up
7
OE1
I, (SE)
LVCMOS
Output Enable, Q1 disables to tri-state,
0 = Disabled, 1 = Enabled, 45KΩ pull-up
12
OE2
I, (SE)
LVCMOS
Output Enable, Q2 disables to tri-state,
0 = Disabled, 1 = Enabled, 45KΩ pull-up
Application Information
Input Reference
When operating with a crystal input reference, do not apply a switching signal to REF_IN.
Crystal Layout
Keep the layers under the crystal as open as possible.
Do not place switching signals or noisy supplies under the crystal.
Truth Tables
PLL_BYPASS
XTAL_SEL
INPUT
OUTPUT
0
PLL
1
XTAL/REF_IN
0
REF_IN
1
XTAL
FSEL
Output Frequency
(MHz)
0
312.5
1
156.25


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