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參數(shù)資料
| 型號(hào)： | ICS843002I-41 |
| 英文描述： | 700MHz, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| 中文描述： | 700MHz的，F(xiàn)EMTOCLOCKS，商標(biāo)VCXO的基于SONET / SDH的抖動(dòng)衰減器 |
| 文件頁數(shù)： | 17/21頁 |
| 文件大?。?/td> | 279K |
| 代理商： | ICS843002I-41 |
843002AKI-41
www.icst.com/products/hiperclocks.html
REV. A JUNE 1, 2005
17
Integrated
Circuit
Systems, Inc.
ICS843002I-41
700MH
Z
, F
EMTO
C
LOCKS
VCXO B
ASED
SONET/SDH J
ITTER
A
TTENUATOR
PRELIMINARY
P
OWER
C
ONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS843002I-41.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS843002I-41 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
= V
CC_MAX
* I
EE_MAX
= 3.465V * 175mA =
606.375mW
Power (outputs)
MAX
=
30mW/Loaded Output pair
If all outputs are loaded, the total power is 2 * 30mW =
120mW
Total Power
_MAX
(3.465V, with all outputs switching) =
606.375mW + 60mW = 666.38
mW
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 + 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
must be used. Assuming an
air flow of 0 linear feet per minute and a multi-layer board, the appropriate value is 34.8°C/W per Table 7 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.666W * 34.8°C/W = 108.2°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).
T
ABLE
7. T
HERMAL
R
ESISTANCE
θ
JA
FOR
32-
PIN
VFQFN, F
ORCED
C
ONVECTION
θ
JA
vs. Air Flow (Linear Feet per Minute)
0
Multi-Layer PCB, JEDEC Standard Test Boards
34.8°C/W
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| ICS843002 | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843002AG | FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843002I-72 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:FEMTOCLOCKS⑩ VCXO BASED WCDMA CLOCK GENERATOR/JITTER ATTENUATOR |
| ICS843003 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AG | 制造商:ICSI 制造商全稱:Integrated Circuit Solution Inc 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AGI-01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AGI-01LF | 功能描述:IC SYNTHESIZER LVPECL 24-TSSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)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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