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參數(shù)資料
| 型號： | ICS840001-31 |
| 英文描述： | FEMTOCLOCKS-TM CRYSTAL -TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| 中文描述： | FEMTOCLOCKS -商標(biāo)晶體到的LVCMOS / LVTTL頻率合成器 |
| 文件頁數(shù)： | 6/9頁 |
| 文件大小： | 164K |
| 代理商： | ICS840001-31 |
840001-31AK
www.icst.com/products/hiperclocks.html
REV. A MAY 4, 2005
6
Integrated
Circuit
Systems, Inc.
ICS840001-31
F
EMTO
C
LOCKS
C
RYSTAL
-
TO
-
LVCMOS/LVTTL F
REQUENCY
S
YNTHESIZER
PRELIMINARY
A
PPLICATION
I
NFORMATION
Figure 2. C
RYSTAL
I
NPU
t I
NTERFACE
C
RYSTAL
I
NPUT
I
NTERFACE
The ICS840001-31 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 2 below were determined using a 26.5625MHz, 18pF par-
allel resonant crystal and were chosen to minimize the ppm er-
ror. The optimum C1 and C2 values can be slightly adjusted for
different board layouts.
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. The ICS840001-31 provides sepa-
rate power supplies to isolate any high switching noise from the
outputs to the internal PLL. V
DD
, V
DDA
and V
DDO
should be indi-
vidually connected to the power supply plane through vias, and
bypass capacitors should be used for each pin. To achieve op-
timum jitter performance, power supply isolation is required. Fig-
ure 1 llustrates how a 10
Ω
resistor along with a 10
μ
F and a
.01
μ
F bypass capacitor should be connected to each V
DDA
pin.
P
OWER
S
UPPLY
F
ILTERING
T
ECHNIQUES
F
IGURE
1. P
OWER
S
UPPLY
F
ILTERING
10
Ω
V
DDA
10
μ
F
.01
μ
F
3.3V
.01
μ
F
V
DD
C1
33p
X1
18pF Parallel Crystal
C2
22p
XTAL_OUT
XTAL_IN
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| ICS840001-32 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
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| ICS840001AGI | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| ICS840001AGI-25LF | 功能描述:IC DRIVER LVCMOS HS 8-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計(jì)時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS840001AGI-25LFT | 功能描述:IC DRIVER LVCMOS HS 8-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計(jì)時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
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