參數(shù)資料
型號: ICS8530DYLF
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 3/16頁
文件大?。?/td> 0K
描述: IC CLK BUFF 1:16 500MHZ 48-LQFP
標(biāo)準(zhǔn)包裝: 250
系列: HiPerClockS™
類型: 扇出緩沖器(分配)
電路數(shù): 1
比率 - 輸入:輸出: 1:16
差分 - 輸入:輸出: 是/是
輸入: HCSL,LVDS,LVHSTL,LVPECL,SSTL
輸出: LVPECL
頻率 - 最大: 500MHz
電源電壓: 2.375 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 48-LQFP
供應(yīng)商設(shè)備封裝: 48-TQFP(7x7)
包裝: 托盤
其它名稱: 8530DYLF
ICS8530DY REVISION E SEPTEMBER 15, 2010
11
2010 Integrated Device Technology, Inc.
ICS8530 Data Sheet
LOW SKEW, 1-TO-16, DIFFERENTIAL-TO-2.5V LVPECL FANOUT BUFFER
3. Calculations and Equations.
The purpose of this section is to calculate the power dissipation for the LVPECL output pairs.
LVPECL output driver circuit and termination are shown in Figure 4.
Figure 4. LVPECL Driver Circuit and Termination
To calculate worst case power dissipation into the load, use the following equations which assume a 50 load, and a termination voltage of
VCCO – 2V.
For logic high, VOUT = VOH_MAX = VCCO_MAX – 0.7V
(VCCO_MAX – VOH_MAX) = 0.7V
For logic low, VOUT = VOL_MAX = VCCO_MAX – 1.4V
(VCCO_MAX – VOL_MAX) = 1.4V
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 – (VCCO_MAX – 2V))/RL] * (VCCO_MAX – VOH_MAX) = [(2V – (VCCO_MAX – VOH_MAX))/RL] * (VCCO_MAX – VOH_MAX) =
[(2V – 0.7V)/50
] * 0.7V = 18.2mW
Pd_L = [(VOL_MAX – (VCCO_MAX – 2V))/RL] * (VCOC_MAX – VOL_MAX) = [(2V – (VCCO_MAX – VOL_MAX))/RL] * (VCCO_MAX – VOL_MAX) =
[(2V – 1.4V)/50
] * 1.4V = 16.8mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 35mW
V
OUT
V
CCO
V
CCO - 2V
Q1
RL
50
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