参数资料
型号: SM802108UMG
厂商: MICREL INC
元件分类: 时钟产生/分配
英文描述: 156.25 MHz, OTHER CLOCK GENERATOR, QCC24
封装: 4 X 4 MM, GREEN, QFN-24
文件页数: 5/11页
文件大小: 457K
代理商: SM802108UMG
Micrel, Inc.
SM802108
January 2011
3
M9999-012111-A
hbwhelp@micrel.com or (408) 955-1690
Pin Description (Continued)
Pin Number
Pin Name
Pin Type
Pin Level
Pin Function
7, 12, 15, 19
TEST
Factory Test Pins, Do not connect anything to these pins.
8
VDD
PWR
Core Power Supply
9
REF_IN
I, (SE)
LVCMOS
Reference Clock Input
10
XIN
I, (SE)
12pF crystal
Crystal Reference Input, no load caps needed.
See Fig. 5.
11
XOUT
O, (SE)
12pF crystal
Crystal Reference Output, no load caps needed.
See Fig. 5.
13, 14
VSS
PWR
Core Power Supply Ground
18
VDDO1
PWR
Power Supply for Output Bank 1
22
VSSO1
PWR
Power Supply Ground for Output Bank 1
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 Table
PLL_BYPASS
XTAL_SEL
INPUT
OUTPUT
0
PLL
1
XTAL/REF_IN
0
REF_IN
1
XTAL
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