SM802101 查看數據表（PDF） - Micrel
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生产厂家
SM802101 Datasheet PDF : 12 Pages
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Micrel, Inc.
Pin Description (Continued)
Pin Number
Pin Name
Pin Type
14
FSEL
I, (SE)
12, 13
31, 37, 38
16, 43, 44
21, 23
24, 39
3, 6, 40
VDD
VDDO1
VDDO2
VSS
(Exposed
Pad)
VSSO1
VSSO2
PWR
PWR
PWR
PWR
PWR
PWR
9
PLL_BYPASS
I, (SE)
10
11, 20, 27, 30, 34
17
18
XTAL_SEL
TEST
REF_IN
XTAL_IN
19
XTAL_OUT
15
OE1
22
OE2
I, (SE)
I, (SE)
I, (SE)
O, (SE)
I, (SE)
I, (SE)
Truth Tables
PLL_BYPASS
0
1
−
−
−
−
XTAL_SEL
−
−
0
1
−
−
OE2
1
1
1
1
0
1
FSEL
0
1
Output Frequency
(MHz)
200
100
SM802101
Pin Level
LVCMOS
LVCMOS
LVCMOS
LVCMOS
12pF crystal
12pF crystal
LVCMOS
LVCMOS
Pin Function
Frequency Select, 1 = 100MHz, 0 = 200MHz,
45KΩ pull-up
Power Supply
Power Supply for Outputs Q0 – Q3
Power Supply for Outputs Q4 – Q7
Core Power Supply Ground. The exposed pad must
be connected to the VSS ground plane.
Power Supply Ground for Q0 – Q3
Power Supply Ground for Outputs Q4 – Q7
PLL Bypass, Selects Output Source
0 = Normal PLL Operation
1 = Output from Input Reference Clock or Crystal
45KΩ pull-down
Selects PLL Input Reference Source
0 = REF_IN, 1 = XTAL, 45KΩ pull-up
Factory Test pins, Do not connect anything to these
pins.
Reference Clock Input
Crystal Reference Input, no load caps needed (see
Figure 5).
Crystal Reference Output, no load caps needed
(see Figure 5).
Output Enable, Outputs Q0 – Q3 disable to tri-state,
0 = Disabled, 1 = Enabled, 45KΩ pull-up
Output Enable, Outputs Q4 – Q7 disable to tri-state,
0 = Disabled, 1 = Enabled, 45KΩ pull-up
OE1
1
1
1
1
1
0
INPUT
−
−
REF_IN
XTAL
−
−
OUTPUT
PLL
XTAL/REF_IN
−
−
Q4-Q7 Tri-state
Q0-Q3 Tri-state
July 2011
3
M9999-072111-A
hbwhelp@micrel.com or (408) 955-1690
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