- 您现在的位置：买卖IC网 > PDF目录22751 > 021AL FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR PDF资料下载
参数资料
| 型号： | 021AL |
| 英文描述： | FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V LVPECL CLOCK GENERATOR |
| 中文描述： | FEMTOCLOCKS -商标晶体至3.3V的LVPECL时钟发生器 |
| 文件页数： | 13/13页 |
| 文件大小： | 189K |
| 代理商： | 021AL |
843021AG
www.icst.com/products/hiperclocks.html
REV. C MARCH 31, 2005
9
Integrated
Circuit
Systems, Inc.
ICS843021
FEMTOCLOCKSCRYSTAL-TO-
3.3V LVPECL CLOCK GENERATOR
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
相关PDF资料 |
PDF描述 |
|---|---|
| 0577-0-43-01-21-02-10-0 | BERYLLIUM COPPER, TIN LEAD (100) OVER NICKEL FINISH, PCB TERMINAL |
| 0577-0-43-01-21-27-10-0 | BERYLLIUM COPPER, GOLD (30) OVER NICKEL FINISH, PCB TERMINAL |
| 0577-0-43-80-21-01-10-0 | BERYLLIUM COPPER ALLOY, TIN LEAD FINISH, PCB TERMINAL |
| 0577-0-43-01-21-01-10-0 | BERYLLIUM COPPER ALLOY, TIN LEAD FINISH, PCB TERMINAL |
| 0577-0-43-01-21-80-10-0 | BERYLLIUM COPPER ALLOY, TIN FINISH, PCB TERMINAL |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 021ASM | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Aluminum Capacitors Axial Standard Miniature |
| 021ASM_12 | 制造商:VISHAY 制造商全称:Vishay Siliconix 功能描述:Aluminum Capacitors Axial Standard Miniature |
| 021-B | 功能描述:罩类、盒类及壳类产品 4.1 x 2.6 x 0.9 Black RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
| 021-G | 功能描述:罩类、盒类及壳类产品 4.1 x 2.6 x 0.9 Gray RoHS:否 制造商:Bud Industries 产品:Boxes 外部深度:6.35 mm 外部宽度:6.35 mm 外部高度:2.56 mm NEMA 额定值: IP 等级: 材料:Acrylonitrile Butadiene Styrene (ABS) 颜色:Red |
| 021-I ALMOND | 制造商:SERPAC Electronic Enclosures 功能描述:Enclosure; Plastic; 4.1 in. L x 2.610 in. W x 0.910 in. H; Almond |
发布紧急采购，3分钟左右您将得到回复。