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| 型號： | ICS841S012DKILFT |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 7/23頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC FREQ SYNTHESIZER 56VFQFN |
| 標準包裝： | 1,000 |
| 系列： | HiPerClockS™, PCI Express® (PCIe) |
| 類型： | 時鐘/頻率合成器，多路復(fù)用器 |
| PLL： | 是 |
| 主要目的： | PCI Express（PCIe） |
| 輸入： | LVCMOS，LVTTL，晶體 |
| 輸出： | HCSL，LVCMOS，LVTTL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:12 |
| 差分 - 輸入:輸出： | 是/無 |
| 頻率 - 最大： | 250MHz |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 56-VFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 56-VFQFP-EP（8x8） |
| 包裝： | 帶卷 (TR) |
ICS841S012BKI REVISION A NOVEMBER 10, 2009
15
2009 Integrated Device Technology, Inc.
ICS841S012I Data Sheet
CRYSTAL-TO-0.7V DIFFERENTIAL HCSL/LVCMOS FREQUENCY SYNTHESIZER
SCHEMATIC EXAMPLE
Figure 7 shows an example of the ICS841S012I application
schematic. In this example, the device is operated at V
D D= VDDOB =
V
DDOC = 3.3V.
The 18pF parallel resonant 25MHz crystal is used.
The C1= 33pF and C2 = 33pF are recommended for frequency
accuracy. For different board layout, the C1 and C2 may be
slightly adjusted for optimizing frequency accuracy. Two examples
of HCSL and one example of LVCMOS termination are shown in
this schematic. The decoupling capacitors should be located as
close as possible to the power pin.
FIGURE 7. ICS841S012I SCHEMATIC EXAMPLE
R1
35
QB0
VDD
VDDO
VDD
IREF
REF_OE
BY PASS
XTAL_OUT
XTAL_IN
REF_SEL
Logic Control Input Examples
Set Logic
Input to '0'
Set Logic
Input to '1'
To Logic
Input
pins
To Logic
Input
pins
Note: This device requires a
reset signal at nMR afte r
powe r-up to function properly.
VDD=3.3V
Using for PCI Express
Add-In Card
VDDO=3.3V
Using for PCI Express
Point-to-Point
Connection
HCSL Termination
LVCMOS
R4
10
TL3
Zo = 50
QA1
QA0
R5
33
R9
50
R8
50
R7
33
TL5
Zo = 50
Ro ~ 7 Ohm
Q1
Driv er_LVCMOS
R6
43
Zo = 50 Ohm
REF_IN
VDD
Zo = 50
LVCMOS
Zo = 50
R3
30
REF_OUT1
REF_OUT0
VDDO
nMR
+
-
RU2
Not Install
RU1
1K
RD2
1K
RD1
Not Install
VDD
VDDO
F_
S
E
L
B
1
F_
S
E
L
C
2
F_
S
E
L
B
0
F_
S
E
L
C
1
F_
S
E
L
C
0
F_
S
E
L
A
0
QA
_
OE
F_
S
E
L
A
1
R12
50
R11
50
C3
0.01u
VDD
C4
10u
VDDA
VDD
nQA1
SS
C
0
F_
S
E
L
B
2
SS
C
1
nQA0
VDDO
VDD
C16
0.1u
(U1, 29)
+
-
(U1, 1)
(U1, 28)
(U1, 52)
TL6
Zo = 50
(U1, 48)
(U1, 7)
(U1, 14)
TL7
Zo = 50
(U1, 56)
(U1, 42)
(U1, 43)
VDDA
C9
0.1u
C10
0.1u
C14
0.1u
R2
10
Note: External tuning
ca pacitors must be used for
prope r operation.
C12
0.1u
C11
0.1u
C8
0.1u
X1
25MHz, CL=18pF
C15
0.1u
C6
0.01u
U1
ICS841S012i
VDD
1
REF_OUT0
2
REF_OUT1
3
GND
4
GND
5
REF_IN
6
VDD
7
REF_SEL
8
XTAL_IN
9
XTAL_OUT
10
BY PASS
11
REF_OE
12
nMR
13
VDD
14
GN
D
15
SS
C
1
16
SS
C
0
17
F
_
SEL
B2
18
F
_
SEL
B1
19
F
_
SEL
B0
20
F
_
SEL
C
2
21
F
_
SEL
C
1
22
F
_
SEL
C
0
23
F
_
SEL
A1
24
GND
35
IREF
34
QA0
33
nQA0
32
QA1
31
VD
D
28
GN
D
27
QA
_
OE
26
F
_
SEL
A0
25
VD
D
O
B
52
QB
4
51
GN
D
50
VD
D
O
B
48
QB
2
47
GN
D
46
QB
1
45
QB
0
44
VD
D
O
B
43
VDDA
37
GND
36
QB
5
53
GN
D
54
QB
6
55
QB
3
49
nQA1
30
VDD
29
VDDA
38
VDDOC
42
QC
41
GND
40
QBC_OE
39
VD
D
O
B
56
C13
0.1u
C1
15pF
C2
22pF
C7
0.1u
C5
10u
R10
475 Ohm
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS841S012I | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:Crystal-to-0.7V Differential HCSL/LVCMOS Frequency Synthesizer |
| ICS841S01BG | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:PCI EXPRESS⑩ CLOCK GENERATOR |
| ICS841S01BGLF | 功能描述:IC CLK GENERATOR PLL 16-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:HiPerClockS™, PCI Express® (PCIe) 標準包裝:1 系列:- 類型:時鐘/頻率發(fā)生器，多路復(fù)用器 PLL:是 主要目的:存儲器，RDRAM 輸入:晶體 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:1:2 差分 - 輸入:輸出:無/是 頻率 - 最大:400MHz 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:Digi-Reel® 其它名稱:296-6719-6 |
| ICS841S01BGLFT | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:PCI EXPRESS⑩ CLOCK GENERATOR |
| ICS841S01BGT | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:PCI EXPRESS⑩ CLOCK GENERATOR |
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