FEMTOC
參數(shù)資料
型號: ICS843004AGI-04LFT
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 14/16頁
文件大?。?/td> 0K
描述: IC SYNTHESIZER LVPECL 24-TSSOP
標準包裝: 2,500
系列: HiPerClockS™, FemtoClock™
類型: 頻率合成器
PLL: 帶旁路
輸入: LVCMOS,LVTTL,晶體
輸出: LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 2:4
差分 - 輸入:輸出: 無/是
頻率 - 最大: 680MHz
除法器/乘法器: 是/無
電源電壓: 3.135 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應商設備封裝: 24-TSSOP
包裝: 帶卷 (TR)
其它名稱: 843004AGI-04LFT
843004AGI-04
www.idt.com
REV. A JULY 26, 2010
7
ICS843004I-04
FEMTOCLOCKS CRYSTAL/LVCMOS-TO-
3.3V LVPECL FREQUENCY SYNTHESIZER
LVCMOS TO XTAL INTERFACE
The XTAL_IN input can accept a single-ended LVCMOS
signal through an AC couple capacitor. A general interface
diagram is shown in
Figure 3. The XTAL_OUT pin can
be left floating. The input edge rate can be as slow as
10ns. For LVCMOS inputs, it is recommended that the
amplitude be reduced from full swing to half swing in order
to prevent signal interference with the power rail and to
reduce noise. This configuration requires that the output
FIGURE 3. GENERAL DIAGRAM FOR LVCMOS DRIVER TO XTAL INPUT INTERFACE
impedance of the driver (Ro) plus the series resistance
(Rs) equals the transmission line impedance. In addition,
matched termination at the crystal input will attenuate the
signal in half. This can be done in one of two ways. First,
R1 and R2 in parallel should equal the transmission line
impedance. For most 50
Ω applications, R1 and R2 can be
100
Ω. This can also be accomplished by removing R1 and
making R2 50
Ω.
R2
Zo = 50
VDD
Ro
Zo = Ro + Rs
R1
VDD
XTAL_IN
XTAL_OUT
.1uf
Rs
INPUTS:
CRYSTAL INPUT:
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
Ω
resistor can be tied from XTAL_IN to ground.
CLK INPUT:
For applications not requiring the use of a clock input, it can
be left floating. Though not required, but for additional
protection, a 1k
Ω resistor can be tied from the CLK input 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
Ω resistor can be used.
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
OUTPUTS:
LVPECL OUTPUT
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.
相關PDF資料
PDF描述
AD569KNZ IC DAC 16BIT MONOTONIC 28-DIP
VI-B4X-MV-F4 CONVERTER MOD DC/DC 5.2V 150W
MS3456L32-17PW CONN PLUG 4POS STRAIGHT W/PINS
VI-B4X-MV-F3 CONVERTER MOD DC/DC 5.2V 150W
VE-2TF-MY-F4 CONVERTER MOD DC/DC 72V 50W
相關代理商/技術參數(shù)
參數(shù)描述
ICS843004AGI-04T 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL/LVCMOS-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER
ICS843004AGILF 功能描述:IC SYNTHESIZER LVPECL 24-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:27 系列:Precision Edge® 類型:頻率合成器 PLL:是 輸入:PECL,晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/是 頻率 - 最大:800MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應商設備封裝:28-SOIC 包裝:管件
ICS843004AGILFT 功能描述:IC SYNTHESIZER LVPECL 24-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 供應商設備封裝:56-VFQFP-EP(8x8) 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT
ICS843004AGIT 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
ICS843004AGLF 功能描述:IC SYNTHESIZER LVPECL 24-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:Precision Edge® 類型:時鐘/頻率合成器 PLL:無 輸入:CML,PECL 輸出:CML 電路數(shù):1 比率 - 輸入:輸出:2:1 差分 - 輸入:輸出:是/是 頻率 - 最大:10.7GHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VFQFN 裸露焊盤,16-MLF? 供應商設備封裝:16-MLF?(3x3) 包裝:帶卷 (TR) 其它名稱:SY58052UMGTRSY58052UMGTR-ND