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| 型号： | ICS8432CY-111 |
| 元件分类： | 时钟及定时 |
| 英文描述： | PLL BASED CLOCK DRIVER, 2 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP32 |
| 封装： | 7 X 7 MM, 1.40 MM HEIGHT, MS-026, LQFP-32 |
| 文件页数： | 5/17页 |
| 文件大小： | 276K |
| 代理商： | ICS8432CY-111 |
8432CY-111
www.icst.com/products/hiperclocks.html
REV. B MARCH 3, 2004
13
Integrated
Circuit
Systems, Inc.
ICS8432-111
700MHZ/350MHZ
DIFFERENTIAL-TO-3.3V 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
load, and a termination
voltage of V
CCO
- 2V.
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
)
Pd_L = [(V
OL_MAX
– (V
CCO_MAX
- 2V))/R
L
] * (V
CCO_MAX
- V
OL_MAX
)
For logic high, V
OUT
= V
OH_MAX
= V
CCO_MAX
– 1.0V
Using V
CCO_MAX
= 3.465, this results in V
OH_MAX
= 2.465V
For logic low, V
OUT
= V
OL_MAX
= V
CCO_MAX
– 1.7V
Using V
CCO_MAX
= 3.465, this results in V
OL_MAX
= 1.765V
Pd_H =[(2.465V - (3.465V - 2V))/50
] * (3.465V - 2.465V) = 20mW
Pd_L =[(1.765V - (3.465V - 2V))/50
] * (3.465V - 1.765V) = 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
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS8432CY-111LF | 功能描述:IC SYNTHESIZER 700/350MHZ 32LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS8432CY-111LFT | 功能描述:IC SYNTHESIZER 700/350MHZ 32LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS8432CY-111T | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ/350MHZ DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS8432DI-101 | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS8432DY101 | 制造商:ICS 功能描述: |
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