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參數(shù)資料
| 型號： | ICS840004AGIT |
| 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)： | 9/11頁 |
| 文件大小： | 169K |
| 代理商： | ICS840004AGIT |
Integrated
Circuit
Systems, Inc.
840004AGI
www.icst.com/products/hiperclocks.html
REV. A JUNE 28, 2005
9
ICS840004I
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
LVCMOS/LVTTL F
REQUENCY
S
YNTHESIZER
PRELIMINARY
R
ELIABILITY
I
NFORMATION
T
RANSISTOR
C
OUNT
The transistor count for ICS840004I is: 3085
T
ABLE
6.
θ
JA
VS
. A
IR
F
LOW
T
ABLE
FOR
20 L
EAD
TSSOP
θ
JA
by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
Multi-Layer PCB, JEDEC Standard Test Boards
114.5°C/W
73.2°C/W
98.0°C/W
66.6°C/W
88.0°C/W
63.5°C/W
NOTE:
Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
L
AYOUT
G
UIDELINE
Figure 3shows a schematic example of the ICS840004I. 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 18
pF parallel resonant 26.5625MHz crystal is used. The C1=22pF
F
IGURE
3. ICS840004I S
CHEMATIC
E
XAMPLE
and C2=22pF are recommended for frequency accuracy. For
different board layout, the C1 and C2 may be slightly adjusted
for optimizing frequency accuracy. 1K
Ω
pullup or pulldown re-
sistors can be used for the logic control input pins.
R4
LVCMOS
Logic Control Input Examples
VDD
XTAL_OUT
VDDO=3.3V
C5
0.1u
VDD
Set Logic
Input to
'1'
VDD=3.3V
C3
10uF
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.
If not using the crystal input, it can be left
floating. For additional protection the XTAL_IN
pin can be tied to ground.
C4
0.01u
RU2
Not Install
VDD
To Logic
Input
pins
VDDO
Optional Termination
C6
0.1u
Zo = 50 Ohm
LVCMOS
XTAL_IN
X1
C1
RD1
Not Install
VDD
R2
10
R3
36
VDDA
U1
ICS840004i
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
OE
MR
VDDA
nc
XXTAL_IN
GND
Q3
Q2
VDDO
F_SEL1
GND
Q0
Q1
To Logic
Input
pins
RD2
1K
RU1
1K
VDD
R5
100
C2
22pF
Set Logic
Input to
'0'
VDD
Zo = 50 Ohm
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICS840004AGL | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AGLF | 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 |
| ICS840004AGLFT | 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 |
| ICS840004AGT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840004AI01 | 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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