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SM802128UMGTR Datasheet(PDF) 3 Page - Micrel Semiconductor

No. de pieza SM802128UMGTR
Descripción Electrónicos  ClockWorks課? 10GbE Octal 156.25MHz,312.5MHz, Ultra-Low Jitter, LVPECL
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Fabricante Electrónico  MICREL [Micrel Semiconductor]
Página de inicio  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

SM802128UMGTR Datasheet(HTML) 3 Page - Micrel Semiconductor

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Micrel, Inc.
SM802128
January 2012
3
hbwhelp@micrel.com or (408) 955-1690
Pin Description (continued)
Pin Number
Pin Name
Pin Type
Pin Level
Pin Function
3, 6, 40
VSSO2
PWR
Power Supply Ground for the Outputs on Bank 2
11, 20, 27, 30,
34
TEST
Factory Test Pins. Do not connect anything to these pins.
12, 13
VDD
PWR
Core Power Supply
21, 23
VSS
(Exposed
Pad)
PWR
Core Power Supply Ground. The exposed pad must be
connected to the VSS ground plane.
17
REF_IN
I, (SE)
LVCMOS
Reference Clock Input
18
XTAL_IN
I, (SE)
Crystal
Crystal Reference Input, no load caps needed (See Figure 5).
19
XTAL_OUT
O, (SE)
Crystal
Crystal Reference Output, no load caps needed (See Figure
5).
15
OE1
I, (SE)
LVCMOS
Output Enable, Q1-Q4 disables to tri-state, 0 = Disabled, 1 =
Enabled, 45KΩ Pull-Up.
22
OE2
I, (SE)
LVCMOS
Output Enable, Q5-Q8 disables to tri-state, 0 = Disabled, 1 =
Enabled, 45KΩ Pull-Up.
9
PLL_BYPASS
I, (SE)
LVCMOS
PLL Bypass, Selects Output Source
0 = Normal PLL Operation
1 = Output from Input Reference Clock or Crystal
45KΩ Pull-Down
10
XTAL_SEL
I, (SE)
LVCMOS
Selects PLL Input Reference Source
0 = REF_IN, 1 = XTAL, 45KΩ Pull-Up
14
FSEL
I, (SE)
LVCMOS
Frequency Select, 1 = 156.25MHz, 0 = 312.5MHz,
45KΩ Pull-Up
Truth Tables
OE1/2
0
Tri-state
1
LVPECL
FSEL
Output Frequency (MHz)
0
312.5
1
156.25
PLL_BYPASS/CSB
XTAL_SEL
0
PLL
1
XTAL/REF_IN
0
REF_IN
1
XTAL


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