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參數(shù)資料
| 型號(hào)： | ICS8741004AGLF |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類(lèi)： | 時(shí)鐘及定時(shí) |
| 英文描述： | DIFFERENTIAL-TO-LVDS/0.7V DIFFERENTIAL PCI EXPRESS⑩ JITTER ATTENUATOR |
| 中文描述： | 8741004 SERIES, PLL BASED CLOCK DRIVER, 4 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO24 |
| 封裝： | 4 40 X 7.80 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-24 |
| 文件頁(yè)數(shù)： | 13/17頁(yè) |
| 文件大?。?/td> | 715K |
| 代理商： | ICS8741004AGLF |
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ICS8741004
DIFFERENTIAL-TO-LVDS/0.7V DIFFERENTIAL PCI EXPRESS JITTER ATTENUATOR
IDT / ICS
PCI EXPRESS JITTER ATTENUATOR
13
ICS8741004AG REV. AAUGUST 3, 2007
Power Considerations
This section provides information on power dissipation and junction temperature for the ICS8741004.
Equations and example calculations are also provided.
1.
Power Dissipation.
The total power dissipation for the ICS741004 is the sum of the core power plus the
analog power
plus the power dissipated in the load(s).
The following is the power dissipation for V
DD
= 3.3V + 5% = 3.465V, which gives worst case results.
NOTE: Please refer to Section 3 for details on calculating power dissipated in the load.
Power (core)
MAX
= V
DD_MAX
* (I
DD_MAX
+ I
DDA_MAX
) = 3.465V * (45mA + 12mA) =
197.5mW
Power (LVDS_output)
MAX
= V
DDO_MAX
* I
DDO_MAX
= 3.465V * 80mA =
227.2mW
Power (HCSL_output)
MAX
= 45.65mW * 2 =
91.3mW
Total Power_
MAX
= (3.465V, with all outputs switching) = 197.5mW + 277.2mW + 91.3mW =
556mW
2. Junction Temperature.
Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad and directly affects the reliability of the device.
The maximum recommended junction temperature for HiPerClockS devices is 125°C.
The equation for Tj is as follows: Tj =
θ
JA
* Pd_total + T
A
Tj = Junction Temperature
θ
JA
= Junction-to-Ambient Thermal Resistance
Pd_total = Total Device Power Dissipation (example calculation is in section 1 above)
T
A
= Ambient Temperature
In order to calculate junction temperature, the appropriate junction-to-ambient thermal resistance
θ
JA
must be used. Assuming no air flow
and a multi-layer board, the appropriate value is 82.3°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.556W * 82.3°C/W = 115.8°C. This is below the limit of 125°C.
This calculation is only an example. Tj will obviously vary depending on the number of loaded outputs, supply voltage, air flow and the type
of board (single layer or multi-layer).
Table 6. Thermal Resistance
θ
JA
for 24 Lead TSSOP, Forced Convection
θ
JA
Vs. Air Flow
0
Meters per Second
1
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
82.3°C/W
78.0°C/W
75.9°C/W
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相關(guān)代理商/技術(shù)參數(shù) |
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| ICS8741004AGLFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 24TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專(zhuān)用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 標(biāo)準(zhǔn)包裝:1,500 系列:- 類(lèi)型:時(shí)鐘緩沖器/驅(qū)動(dòng)器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱(chēng):93786AFT |
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| ICS8741004BGILFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 24TSSOP RoHS:是 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專(zhuān)用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 標(biāo)準(zhǔn)包裝:1,500 系列:- 類(lèi)型:時(shí)鐘緩沖器/驅(qū)動(dòng)器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱(chēng):93786AFT |
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