參數(shù)資料
型號: ICS8422002AGILFT
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 4/16頁
文件大?。?/td> 0K
描述: IC SYNTHESIZER LVHSTL 20-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: LVCMOS,LVTTL,晶體
輸出: LVHSTL
電路數(shù): 1
比率 - 輸入:輸出: 2:2
差分 - 輸入:輸出: 無/是
頻率 - 最大: 226.66MHz
除法器/乘法器: 是/是
電源電壓: 2.375 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 20-TSSOP
包裝: 帶卷 (TR)
其它名稱: 8422002AGILFT
ICS8422002AGI REVISION A AUGUST 12, 2009
12
2009 Integrated Device Technology, Inc.
ICS8422002I Data Sheet
FEMTOCLOCK CRYSTAL-TO-LVHSTL FREQUENCY SYNTHESIZER
3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
LVHSTL output driver circuit and termination are shown in Figure 5.
Figure 5. LVHSTL Driver Circuit and Termination
To calculate worst case power dissipation into the load, use the following equations which assume a 50 load.
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = (VOH_MAX /RL) * (VDDO_MAX – VOH_MAX)
Pd_L = (VOL_MAX /RL) * (VDDO_MAX – VOL_MAX)
Pd_H = (1.2V/50
) * (2V – 1.2V) = 19.2mW
Pd_L = (0.4V/50
) * (2V – 0.4V) = 12.8mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 32mW
V
OUT
V
DDO
Q1
RL
50
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