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參數(shù)資料
| 型號： | ICS84025EM |
| 英文描述： | CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER |
| 中文描述： | 水晶到的LVCMOS / LVTTL頻率合成扇出緩沖器 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 143K |
| 代理商： | ICS84025EM |
84025EM
www.icst.com/products/hiperclocks.html
REV. A APRIL 16, 2003
7
ICS84025
C
RYSTAL
-
TO
-LVCMOS / LVTTL
F
REQUENCY
S
YNTHESIZER
WITH
F
ANOUT
B
UFFER
PRELIMINARY
A
PPLICATION
I
NFORMATION
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS84025 provides sepa-
rate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
, V
, and V
should be individually connected to the power supply
plane through vias, and bypass capacitors should be
used for each pin. To achieve optimum jitter performance,
power supply isolation is required. Figure 2 illustrates how
a 24
resistor along with a 10
μ
F and a .01
μ
F bypass
capacitor should be connected to each V
DDA
pin.
F
IGURE
2. P
OWER
S
UPPLY
F
ILTERING
24
V
DDA
10
μ
F
.01
μ
F
3.3V
.01
μ
F
V
DD
Figure 3. C
RYSTAL
I
NPU
t I
NTERFACE
C
RYSTAL
I
NPUT
I
NTERFACE
A crystal can be characterized for either series or parallel
mode operation. The ICS84025 has a built-in crystal oscillator
circuit. This interface can accept either a series or parallel
crystal without additional components and generate
P
OWER
S
UPPLY
F
ILTERING
T
ECHNIQUES
frequencies with accuracy suitable for most applications.
Additional accuracy can be achieved by adding two small
capacitors C1 and C2 as shown in Figure 3.
C2
22pF
C1
18pF
25MHz X1
ICS84025
20
21
XTAL2
XTAL1
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ICS84025EMT | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-LVCMOS / LVTTL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER |
| ICS840271BGILF | 功能描述:IC TRANSLATOR ETHER SYNC 8TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:HiPerClockS™ 標(biāo)準(zhǔn)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 |
| ICS840271BGILFT | 功能描述:IC TRANSLATOR ETHER SYNC 8TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 專用 系列:HiPerClockS™ 標(biāo)準(zhǔn)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 |
| ICS840271I | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:SYNCHRONOUS ETHERNET FREQUENCY TRANSLATOR |
| ICS840272I | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:Synchronous Ethernet Frequency Translator |
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