參數(shù)資料
型號: ICS843003AGLFT
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 4/21頁
文件大?。?/td> 0K
描述: IC SYNTHESIZER LVPECL 24-TSSOP
標(biāo)準(zhǔn)包裝: 2,500
系列: HiPerClockS™, FemtoClock™
類型: 頻率合成器
PLL: 帶旁路
輸入: 晶體
輸出: LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 1:3
差分 - 輸入:輸出: 無/是
頻率 - 最大: 700MHz
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: 24-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 帶卷 (TR)
其它名稱: 843003AGLFT
ICS843003
FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
IDT / ICS LVPECL FREQUENCY SYNTHESIZER
12
ICS843003AG REV. A FEBRUARY 19, 2008
Application Information
Power Supply Filtering Technique
As in any high speed analog circuitry, the power supply pins are
vulnerable to random noise. To achieve optimum jitter
performance, power supply isolation is required. The ICS843003
provides separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. VCC, VCCA and VCCO_x
should be individually connected to the power supply plane
through vias, and 0.01F bypass capacitors should be used for
each pin. Figure 2 illustrates this for a generic VCC 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 2. Power Supply Filtering
Recommendations for Unused Input and Output Pins
Inputs:
Crystal Inputs
For applications not requiring the use of the crystal oscillator input,
both XTAL_IN and XTAL_OUT can be left floating. Though not
required, but for additional protection, a 1k
resistor can be tied
from XTAL_IN to ground.
TEST_CLK Input
For applications not requiring the use of the test clock, it can be left
floating. Though not required, but for additional protection, a 1k
resistor can be tied from the TEST_CLK to ground.
LVCMOS Control Pins
All control pins have internal pull-ups or pull-downs; 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.
VCC
VCCA
3.3V
10
10F
.01F
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