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參數(shù)資料
| 型號(hào)： | ICS843AGI-75 |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 75 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封裝： | 4.40 X 3 MM, 0.925 MM HEIGHT, MO-153, TSSOP-8 |
| 文件頁(yè)數(shù)： | 12/12頁(yè) |
| 文件大?。?/td> | 192K |
| 代理商： | ICS843AGI-75 |
843AGI-75
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 8, 2005
9
Integrated
Circuit
Systems, Inc.
ICS843I-75
75MHZ, LVCMOS, LVPECL
DUAL OUTPUT OSCILLATOR
PRELIMINARY
3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
LVPECL output driver circuit and termination are shown in Figure 3.
To calculate worst case power dissipation into the load, use the following equations which assume a 50
Ω load, and a
termination
voltage of V
CC
- 2V.
For logic high, V
OUT
= V
OH_MAX
= V
CC_MAX
– 0.9V
(V
CCO_MAX
- V
OH_MAX
) = 0.9V
For logic low, V
OUT
= V
OL_MAX
= V
CC_MAX
– 1.7V
(V
CCO_MAX
- V
OL_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 = [(V
OH_MAX
– (V
CC_MAX
- 2V))/R
L
] * (V
CC_MAX
- V
OH_MAX
) = [(2V - (V
CC_MAX
- V
OH_MAX
))/R
L
] * (V
CC_MAX
- V
OH_MAX
) =
[(2V - 0.9V)/50
Ω] * 0.9V = 19.8mW
Pd_L = [(V
OL_MAX
– (V
CC_MAX
- 2V))/R
L
] * (V
CC_MAX
- V
OL_MAX
) = [(2V - (V
CC_MAX
- V
OL_MAX
))/R
L
] * (V
CC_MAX
- V
OL_MAX
) =
[(2V - 1.7V)/50
Ω] * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30mW
FIGURE 3. LVPECL DRIVER CIRCUIT AND TERMINATION
Q1
V
OUT
V
CC
RL
50
V
CC - 2V
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| ICS843AGI-75LF | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AGI-75LFT | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AGI-75T | 制造商:ICS 制造商全稱:ICS 功能描述:75MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AM-106 | 制造商:ICS 制造商全稱:ICS 功能描述:106.25MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
| ICS843AM-106LF | 制造商:ICS 制造商全稱:ICS 功能描述:106.25MHZ, LVCMOS, LVPECL DUAL OUTPUT OSCILLATOR |
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