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| 型号： | ICS853S012AKI |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟及定时 |
| 英文描述： | 853S SERIES, LOW SKEW CLOCK DRIVER, 1 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), QCC32 |
| 封装： | 5 MM X 5 MM, 0.75 MM HEIGHT, MO-220VHHD-2, VFQFN-32 |
| 文件页数： | 5/17页 |
| 文件大小： | 2291K |
| 代理商： | ICS853S012AKI |
IDT / ICS LVPECL CLOCK/DATA MULTIPLEXER
13
ICS853S012AKI REV. A JANUARY 4, 2007
ICS853S012I
12:1, DIFFERENTIAL-TO-3.3V, 2.5V LVPECL CLOCK/DATA MULTIPLEXER
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 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
CC
- 2V.
For logic high, V
OUT
= V
OH_MAX
= V
CCO_MAX
– 0.935V
(V
CC_MAX
- V
OH_MAX
) = 0.935V
For logic low, V
OUT
= V
OL_MAX
= V
CCO_MAX
– 1.67V
(V
CCO_MAX
- V
OL_MAX
) = 1.67V
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 - 0.935V)/50
] * 0.935V = 19.92mW
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 - 1.67V)/50
] * 1.67V = 11.02mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.94mW
Pd_in_H = [(V
OH
– (V
CC
- 2V)]
2 /R
L
= [(V
CC
- 1V) - (V
CC
- 2V)]
2 /R
L
= (1V)
2 /50
= 20.0mW
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 |
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|---|---|
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| ICS853S014AGILFT | 制造商:Integrated Device Technology Inc 功能描述:IC FANOUT BUFFER 20TSSOP 制造商:Integrated Device Technology Inc 功能描述:IC CLK BUFF 2:5 2GHZ 20TSSOP |
| ICS853S01AGILF | 制造商:Integrated Device Technology Inc 功能描述: |
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