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參數(shù)資料
| 型號： | ICS84327 |
| 英文描述： | CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
| 中文描述： | 水晶到3.3的LVPECL頻率合成瓦/多功能扇出緩沖器 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大小： | 249K |
| 代理商： | ICS84327 |
84327AM
www.icst.com/products/hiperclocks.html
REV. A SEPTEMBER 18, 2003
9
ICS84327
C
RYSTAL
-
TO
-3.3V LVPECL
F
REQUENCY
S
YNTHESIZER
W
/I
NTEGRATED
F
ANOUT
B
UFFER
PRELIMINARY
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS84327 has been characterized with 18pF parallel reso-
nant crystals. The capacitor values shown in Figure 4below were
Figure 4. C
RYSTAL
I
NPU
t I
NTERFACE
C2
22pF
C1
18pF
25MHz X1
ICS84327
19
20
XTAL2
XTAL1
determined using a 25MHz 18pF parallel resonant crystal and
were chosen to minimize the ppm error.
F
IGURE
5A. ICS84327 S
CHEMATIC
E
XAMPLE
S
CHEMATIC
E
XAMPLE
Figure 5A shows a schematic example of using an ICS84327.
In this example, the input is a 25MHz parallel resonant crystal
with load capacitor CL=18pF. The frequency fine tuning
capacitors C1 and C2 is 22pF and 18pF respectively. This
example also shows logic control input handling. The configu-
ration is set at F_SEL[2:0]=011, therefore, the output frequency
is 625MHz. It is recommended to have one decouple capaci-
tor per power pin. Each decoupling capacitor should be lo-
cated as close as possible to the power pin. The low pass
filter R7, C11 and C16 for clean analog supply should also be
located as close to the V
CCA
pin as possible.
RD3
SP
(U1,13)
Zo = 50
RU2
1K
VCCA
22p
C5
(U1,24)
VCC
R4
1K
F_SEL1
F_SEL0
C1
C6
F_SEL0
VCC=3.3V
RU1
SP
RD2
SP
RD1
1K
X1
25MHz,18pF
+
-
R1
50
VCC
F_SEL2
R5
1K
C2
18p
F_SEL1
VCC
U1
ICS84327
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Q0
nQ1
nQ1
Q2
nQ3
nQ3
Q4
nQ4
nQ5
VCCO
VEE
PLL_SEL
VCC
VCCA
F_SEL2
XTAL2
XTAL1
MR
F_SEL1
F_SEL0
VCCO
SP = Spare, Not Installed
RU3
1K
C16
10u
VCC
Zo = 50
F_SEL2
C11
0.1u
C3
e.g. F_SEL[2:0]=011
R7
24
(U1,16)
VCC
R2
50
R3
50
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| ICS84327AM | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
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| ICS84327AMLFT | 功能描述:IC SYNTHESIZER LVPECL 24SOIC RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:HiPerClockS™ 標準包裝:1,500 系列:- 類型:時鐘緩沖器/驅(qū)動器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
| ICS84327AMT | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
| ICS84329 | 制造商:ICS 制造商全稱:ICS 功能描述:700MHZ, LOW JITTER, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
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