- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67690 > ICS84321AYLFT 260 MHz, OTHER CLOCK GENERATOR, PQFP32 PDF資料下載
參數(shù)資料
| 型號： | ICS84321AYLFT |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 260 MHz, OTHER CLOCK GENERATOR, PQFP32 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, LEAD FREE, MS-026, LQFP-32 |
| 文件頁數(shù)： | 6/18頁 |
| 文件大?。?/td> | 204K |
| 代理商： | ICS84321AYLFT |
84321AY
www.icst.com/products/hiperclocks.html
REV. B JUNE 9, 2005
14
Integrated
Circuit
Systems, Inc.
ICS84321
260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
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 6.
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
CCO
- 2V.
For logic high, V
OUT
= V
OH_MAX
= V
CCO_MAX
– 1.0V
(V
CCO_MAX
- V
OH_MAX
) = 1.0V
For logic low, V
OUT
= V
OL_MAX
= V
CCO_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
CCO_MAX
- 2V))/R
L
] * (V
CCO_MAX
- V
OH_MAX
) = [(2V - (V
CCO_MAX
- V
OH_MAX
))/R
L
] * (V
CCO_MAX
- V
OH_MAX
) =
[(2V - 1V)/50
Ω) * 1V = 20.0mW
Pd_L = [(V
OL_MAX
– (V
CCO_MAX
- 2V))/R
L
] * (V
CCO_MAX
- V
OL_MAX
) = [(2V - (V
CCO_MAX
- V
OL_MAX
))/R
L
] * (V
CCO_MAX
- V
OL_MAX
) =
[(2V - 1.7V)/50
Ω) * 1.7V = 10.2mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.2mW
FIGURE 6. LVPECL DRIVER CIRCUIT AND TERMINATION
Q1
V
OUT
V
CCO
RL
50
V
CCO - 2V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS843246AMIT | 333.33 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843246AMLFT | 333.33 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843246AGT | 333.33 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843246AMLF | 333.33 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS84324AMLFT | 125 MHz, OTHER CLOCK GENERATOR, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS84321AYT | 制造商:ICS 制造商全稱:ICS 功能描述:260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84321I | 制造商:ICS 制造商全稱:ICS 功能描述:260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84324 | 制造商:ICS 制造商全稱:ICS 功能描述:CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER WITH FANOUT BUFFER |
| ICS843241I-04 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKSa?￠ CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK GENERATOR |
| ICS843242 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。