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參數(shù)資料
| 型號： | ICS840004AG-01LFT |
| 英文描述： | FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS⑩晶體到的LVCMOS / LVTTL頻率合成器 |
| 文件頁數(shù)： | 10/13頁 |
| 文件大?。?/td> | 262K |
| 代理商： | ICS840004AG-01LFT |
Integrated
Circuit
Systems, Inc.
8400042AG-01
www.icst.com/products/hiperclocks.html
REV. B JANUARY 3, 2006
10
ICS840004-01
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
LVCMOS/LVTTL F
REQUENCY
S
YNTHESIZER
PRELIMINARY
3.3V
R3
36
RU1
1K
Zo = 50 Ohm
C3
10uF
RD1
Not Install
Logic Control Input Examples
R4
36
R2
10
C6
0.1u
C4
0.01u
To Logic
Input
pins
XTAL_IN
RD2
1K
VDDA
Set Logic
Input to
'1'
LVCMOS
RU2
Not Install
3.3V
3.3V
C5
0.1u
C2
22pF
Set Logic
Input to
'0'
3.3V
Zo = 50 Ohm
LVCMOS
3.3V
To Logic
Input
pins
U1
ICS840004-01
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
TEST_CLK
OE
MR
nPLL_SEL
VDDA
nc
VDD
XTAL_OUT
XTAL_IN
GQ3
Q2
VDDO
F_SEL1
GND
Q0
Q1
XTAL_OUT
X1
C1
L
AYOUT
G
UIDELINE
Figure 3
shows a schematic example of the ICS840004-01. 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
F
IGURE
3. ICS840004-01 S
CHEMATIC
E
XAMPLE
C2=22pF are recommended for frequency accuracy. For dif-
ferent board layout, the C1 and C2 may be slightly adjusted
for optimizing frequency accuracy. 1K
Ω
pullup or pulldown
resistors can be used for the logic control input pins.
I
NPUTS
:
C
RYSTAL
I
NPUT
:
For applications not requiring the use of the crystal oscillator
input, both XTAL_IN and XTAL_OUT can be left floating.
Though not required, but for additional protection, a 1k
Ω
resistor can be tied from XTAL_IN to ground.
TEST_CLK I
NPUT
:
For applications not requiring the use of the test clock, it can
be left floating. Though not required, but for additional
protection, a 1k
Ω
resistor can be tied from the TEST_CLK to
ground.
LVCMOS C
ONTROL
P
INS
:
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1k
Ω
resistor can be used.
R
ECOMMENDATIONS
FOR
U
NUSED
I
NPUT
AND
O
UTPUT
P
INS
O
UTPUTS
:
LVCMOS O
UTPUT
:
All unused LVCMOS output can be left floating. We
recommend that there is no trace attached.
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| ICS840004-11 | FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004A11 | FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AG-11 | FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AG-11LF | FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICS840004AG-01T | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AG-11 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AG-11LF | 功能描述:IC FREQ SYNTHESIZER 20-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標準包裝:1,000 系列:- 類型:時鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應商設備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS840004AG-11LFT | 功能描述:IC FREQ SYNTHESIZER 20-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標準包裝:1,000 系列:- 類型:時鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應商設備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS840004AG-11T | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
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