參數(shù)資料
型號: MIC4555YML TR
廠商: Micrel Inc
文件頁數(shù): 3/15頁
文件大小: 0K
描述: IC SIM CARD LEVEL SHIFTER 16MLF
標準包裝: 1
邏輯功能: 電平移位器,雙向
位數(shù): 1
輸入類型: 電壓
輸出類型: 電壓
數(shù)據(jù)速率: 5MHz
通道數(shù): 1
輸出/通道數(shù)目: 1
差分 - 輸入:輸出: 無/無
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 125°C
封裝/外殼: 16-VFQFN 裸露焊盤,16-MLF?
供應商設備封裝: 16-MLF?(3x3)
包裝: 標準包裝
其它名稱: 576-3962-6
ICS8535I-31
LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/LVCMOS-TO-3.3V LVPECL FANOUT BUFFER
ICS8535AGI-31 REVISION A JANUARY 27, 2010
11
2010 Integrated Device Technology, Inc.
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 5.
Figure 5. 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
VCC – 2V.
For logic high, VOUT = VOH_MAX = VCC_MAX – 0.9V
(VCC_MAX – VOH_MAX) = 0.9V
For logic low, VOUT = VOL_MAX = VCC_MAX – 1.7V
(VCC_MAX – VOL_MAX) = 1.7V
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 – (VCC_MAX – 2V))/RL] * (VCC_MAX – VOH_MAX) = [(2V - (VCC_MAX – VOH_MAX))/RL] * (VCC_MAX – VOH_MAX) =
[(2V - 0.9V)/50
] * 0.9V = 19.8mW
Pd_L = [(VOL_MAX – (VCC_MAX – 2V))/RL] * (VCC_MAX – VOL_MAX) = [(2V – (VCC_MAX – VOL_MAX))/RL] * (VCC_MAX – VOL_MAX) =
[(2V – 1.7V)/50
] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
V
OUT
V
CC
V
CC - 2V
Q1
RL
50
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