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參數(shù)資料
| 型號： | ICS843252AGLFT |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 16/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SYNTHESIZER LVPECL 16-TSSOP |
| 標準包裝： | 2,500 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 類型： | 頻率合成器 |
| PLL： | 是 |
| 輸入： | 晶體 |
| 輸出： | LVPECL |
| 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： | 625MHz |
| 除法器/乘法器： | 是/無 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | 0°C ~ 70°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： | 帶卷 (TR) |
| 其它名稱： | 843252AGLFT |
ICS843252
FEMTOCLOCKTM CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER
IDT / ICS 3.3V LVPECL FREQUENCY SYNTHESIZER
9
ICS843252AG REV. A NOVEMBER 3, 2008
Application Information
Recommendations for Unused Input Pins
Inputs:
LVCMOS Control Pins
All control pins have internal pullups and pulldowns; additional
resistance is not required but can be added for additional
protection. A 1k
resistor can be used.
Outputs:
LVPECL Outputs
All unused LVPECL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential output
pair should either be left floating or terminated.
Power Supply Filtering Technique
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. To achieve optimum jitter per-
formance, power supply isolation is required. The ICS843252
provides separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. VCC, VCCA, VCCO_A, and
VCCO_B should be individually connected to the power supply
plane through vias, and 0.01F bypass capacitors should be used
for each pin. Figure 1 illustrates this for a generic VDD pin and also
shows that VCCA requires that an additional 10 resistor along with
a 10
F bypass capacitor be connected to the V
CCA pin.
Figure 1. Power Supply Filtering
Crystal Input Interface
The ICS843252 has been characterized with 18pF parallel
resonant crystals. The capacitor values, C1 and C2, shown in
Figure 2 below were determined using a 25MHz, 18pF parallel
resonant crystal and were chosen to minimize the ppm error.
Figure 2. Crystal Input Interface
VCC
VCCA
3.3V
10
10F
.01F
XTAL_IN
XTAL_OUT
X1
18pF Parallel Crystal
C1
22p
C2
22p
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參數(shù)描述 |
|---|---|
| ICS843252AGT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843253AGI-45LF | 功能描述:IC SYNTHESIZER LVPECL 16-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(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS843253AGI-45LFT | 功能描述:IC SYNTHESIZER LVPECL 16-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(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS843256 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
| ICS843256AG | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER W/INTEGRATED FANOUT BUFFER |
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