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參數(shù)資料
| 型號： | 840004AGI-01T |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 175 MHz, OTHER CLOCK GENERATOR, PDSO20 |
| 封裝： | 6.5 X 4.4 MM, 0.925 MM HEIGHT, MO-153, TSSOP-20 |
| 文件頁數(shù)： | 6/18頁 |
| 文件大?。?/td> | 2902K |
| 代理商： | 840004AGI-01T |
ICS840004I-01
FEMTOCLOCKS CRYSTAL-TO-LVCMOS/LVTTL CLOCK SYNTHESIZER
IDT / ICS LVCMOS/LVTTL FREQUENCY SYNTHESIZER
14
ICS840004AGI-01 REV. B OCTOBER 31, 2008
Schematic Example
Figure 4 shows a schematic example of the ICS840004I-01. An
example of LVCMOS termination is shown in this schematic.
Additional LVCMOS termination approaches are shown in the
LVCMOS Termination Application Note. In this example, an 18pF
parallel resonant 25MHz crystal is used. The C1= 22pF and
C2 = 22pF are recommended for frequency accuracy. For different
board layouts, the C1 and C2 may be slightly adjusted for
optimizing frequency accuracy. 1k
pullup or pulldown resistors
can be used for the logic control input pins.
Figure 4. P.C. ICS840004I-01 Schematic Example
R5
100
RU1
1K
Zo = 50 Ohm
R4
100
R2
10
Unused outputs can be left floating. There should be
no trace attached to unused outputs. Device
characterized and specification limits set with all
outputs terminated.
VDD
C3
10uF
C1
22pF
RU2
Not Install
RD2
1K
C6
0.1u
XTAL_IN
VDD
If not using the crystal input, it can be left floating.
For additional protection the XTAL_IN pin can be
tied to ground.
Logic Control Input Examples
VDDO
VDD
VDDA
X1
Set Logic
Input to
'1'
U1
840004i_01
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
20
19
18
17
F_SEL0
nc
nXTAL_SEL
REF_CLK
OE
MR
nPLL_SEL
VDDA
nc
VDD
XTAL_OUT
XTAL_IN
GND
Q3
Q2
VDDO
F_SEL1
GND
Q0
Q1
VDD
To Logic
Input
pins
LVCMOS
R3
36
RD1
Not Install
C2
22pF
VDD=3.3V
VDD
VDDO=3.3V
To Logic
Input
pins
C5
0.1u
Optional Termination
Zo = 50 Ohm
XTAL_OUT
VDD
C4
0.01u
LVCMOS
Set Logic
Input to
'0'
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 840004AGIT | 制造商:Integrated Device Technology Inc 功能描述:PLL FREQ SYNTHESIZER SGL 20TSSOP - Tape and Reel |
| 840004AGLF | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| 840004AGLFT | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| 840004AGT | 制造商:Integrated Device Technology Inc 功能描述:840004AGT - Tape and Reel |
| 840004BGI-01LF | 功能描述:時鐘合成器/抖動清除器 RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
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