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參數(shù)資料
| 型號： | ICS8431DMI-01 |
| 元件分類： | 時鐘產(chǎn)生/分配 |
| 英文描述： | 200 MHz, OTHER CLOCK GENERATOR, PDSO28 |
| 封裝： | 7.50 X 18.05 X 2.25 MM, MS-013, MO-119, SOIC-28 |
| 文件頁數(shù)： | 2/15頁 |
| 文件大?。?/td> | 323K |
| 代理商： | ICS8431DMI-01 |
8431DMI-01
www.icst.com/products/hiperclocks.html
REV. A FEBRUARY 4, 2003
10
Integrated
Circuit
Systems, Inc.
ICS8431I-01
200MHZ, LOW JITTER,
CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS8431I-01.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS8431I-01 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for V
CC = 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 = VCC_MAX * IEE_MAX = 3.465V * 140mA = 485.1mW
Power (outputs)
MAX = 30.2mW/Loaded Output pair
If all outputs are loaded, the total power is 1 * 30.2mW = 30.2mW
Total Power
_MAX (3.465V, with all outputs switching) = 485.1mW + 30.2mW = 515.3mW
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 HiPerClockSTM 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 39.7°C/W per Table 7 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.515W * 39.7°C/W = 105.4°C. This is well 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).
q
JA by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
76.2°C/W
60.8°C/W
53.2°C/W
Multi-Layer PCB, JEDEC Standard Test Boards
46.2°C/W
39.7°C/W
36.8°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
Table 7. THERMAL RESISTANCE
q
JA
FOR
28-PIN SOIC, FORCED CONVECTION
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS8431EM11 | 制造商:ICS 功能描述: |
| ICS8431I-21 | 制造商:ICS 制造商全稱:ICS 功能描述:350MHZ, LOW JITTER, CRYSTAL OSCILLATOR-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS84320-01 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84320-01K | 制造商:ICS 制造商全稱:ICS 功能描述:780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS843201AG-375LF | 功能描述:IC SYNTHESIZER 375MHZ 16-TSSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計(jì)時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類型:頻率合成器 PLL:是 輸入:PECL，晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/是 頻率 - 最大:800MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件 |
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