SM802109 Datasheet, PDF (3/11 Pages) Micrel Semiconductor – ClockWorks™ PCI-e Quad 100MHz Ultra-Low Jitter, HCSL Frequency Synthesizer

Micrel, Inc.
Pin Description (Continued)
Pin Number
Pin Name
Pin Type
7, 12, 15, 19
TEST
8
13, 14
18
22
9
VDD
VSS
(Exposed Pad)
VDDO1
VSSO1
REF_IN
PWR
PWR
PWR
PWR
I, (SE)
10
XTAL_IN
I, (SE)
11
XTAL_OUT
O, (SE)
SM802109
Pin Level
LVCMOS
Crystal
Crystal
Pin Function
Factory Test pins, Do not connect anything to these
pins.
Core Power Supply
Core Power Supply Ground. The exposed pad must
be connected to the VSS ground plane.
Power Supply for Output Bank 1
Power Supply Ground for Output Bank 1
Reference Clock Input
Crystal Reference Input, no load caps needed (see
Figure 5).
Crystal Reference Output, no load caps needed (see
Figure 5).
Truth Table
PLL_BYPASS
0
1
−
−
XTAL_SEL
−
−
0
1
INPUT
−
−
REF_IN
XTAL
OUTPUT
PLL
XTAL/REF_IN
−
−
September 2011
3
M9999-092911-B
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