参数资料
型号: ICS853310AVT
厂商: INTEGRATED DEVICE TECHNOLOGY INC
元件分类: 时钟及定时
英文描述: 853310 SERIES, LOW SKEW CLOCK DRIVER, 8 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQCC28
封装: 11.60 X 11.40 MM, 4.10 MM HEIGHT, PLASTIC, MS-018, LCC-28
文件页数: 4/17页
文件大小: 423K
代理商: ICS853310AVT
853310AV
www.icst.com/products/hiperclocks.html
REV. A NOVEMBER 22, 2005
12
Integrated
Circuit
Systems, Inc.
ICS853310
LOW SKEW, 1-TO-8
DIFFERENTIAL-TO-3.3V LVPECL/ECL FANOUT BUFFER
3. Calculations and Equations.
LVPECL output driver circuit and termination are shown in Figure 5.
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
– 0.935V
(V
CCO_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 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 - 0.935V)/50
Ω] * 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
Ω] * 1.67V = 11.02mW
Total Power Dissipation per output pair = Pd_H + Pd_L = 30.94mW
Figure 5. LVPECL Driver Circuit and Termination
Q1
V
OUT
V
CCO
RL
50
V
CCO - 2V
ICS853310
LOW SKEW, 1-TO-8 DIFFERENTIAL-TO-3.3V LVPECL/ECL FANOUT BUFFER
TSD
IDT / ICS LOW SKEW, 1-TO-8 DIFFERENTIAL-TO-3.3V LVPECL/ECL FANOUT BUFFER
ICS853310
12
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ICS8533AG-01LNT 8533 SERIES, LOW SKEW CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20
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