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參數(shù)資料
| 型號： | 874003DG-02T |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時鐘及定時 |
| 英文描述： | 874003 SERIES, PLL BASED CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| 封裝： | 6.50 X 4.40 MM, 0.92 MM HEIGHT, MO-153, TSSOP-20 |
| 文件頁數(shù)： | 2/14頁 |
| 文件大小： | 1050K |
| 代理商： | 874003DG-02T |
IDT / ICS PCI EXPRESS JITTER ATTENUATOR
10
ICS874003AG-02 REV A March 3, 2009
ICS874003-02
PCI EXPRESS JITTER ATTENUATOR
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS874003-02.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS874003-02 is the sum of the core 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.
Power (core)
MAX
= V
DD_MAX
* (I
DD_MAX
+ I
DDA_MAX
) = 3.465V * (75mA + 12mA) = 301.45mW
Power (outputs)
MAX
= V
DDO_MAX
* I
DDO_MAX
= 3.465V * 75mA = 259.87mW
Total Power
_MAX
= 301.45mW + 259.87mW = 561.32mW
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
TM devices is 125°C.
The equation for Tj is as follows: Tj =
θ
JA * Pd_total + TA
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 a
moderate air flow of 200 linear feet per minute and a multi-layer board, the appropriate value is 66.6°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.561W * 66.6°C/W = 107.3°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
θθθθθ
JA
FOR
20-LEAD TSSOP, FORCED CONVECTION
θθθθθ
JA
by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
114.5°C/W
98.0°C/W
88.0°C/W
Multi-Layer PCB, JEDEC Standard Test Boards
73.2°C/W
66.6°C/W
63.5°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 874003DGI-02 | 制造商:Integrated Device Technology Inc 功能描述:PCI EXPRESS JITTER ATTENUATOR, TSSOP20 IND TMP - Rail/Tube |
| 874003DGI-02LF | 功能描述:時鐘合成器/抖動清除器 PCI EXPRESS JITTER ATTENUATOR RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| 874003DGI-02LFT | 功能描述:時鐘合成器/抖動清除器 PCI EXPRESS JITTER ATTENUATOR RoHS:否 制造商:Skyworks Solutions, Inc. 輸出端數(shù)量: 輸出電平: 最大輸出頻率: 輸入電平: 最大輸入頻率:6.1 GHz 電源電壓-最大:3.3 V 電源電壓-最小:2.7 V 封裝 / 箱體:TSSOP-28 封裝:Reel |
| 874004AG | 制造商:Integrated Device Technology Inc 功能描述:PCI EXPRESS JITTER ATTENUATOR 24TSSOP - Rail/Tube |
| 874004AGT | 制造商:Integrated Device Technology Inc 功能描述:874004AGT - Tape and Reel |
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