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參數(shù)資料
| 型號： | ICS843002AKI-40LFT |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 10/24頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SYNTHESIZER LVPECL 32-VFQFPN |
| 標準包裝： | 2,500 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 類型： | 時鐘發(fā)生器，時鐘同步器，頻率變換器，抖動衰減器，多路復用器 |
| PLL： | 帶旁路 |
| 輸入： | HCSL，LVCMOS，LVDS，LVHSTL，LVPECL，LVTTL，SSTL |
| 輸出： | LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 3:2 |
| 差分 - 輸入:輸出： | 是/是 |
| 頻率 - 最大： | 175MHz |
| 除法器/乘法器： | 是/是 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-VFQFN 裸露焊盤 |
| 供應商設備封裝： | 32-VFQFPN 裸露焊盤（4x4） |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 843002AKI-40LFT |
ICS843002I-40
175MHZ, FEMTOCLOCKS VCXO BASED SONET/SDH JITTER ATTENUATOR
IDT / ICS VCXO BASED SONET/SDH JITTER ATTENUATOR
18
ICS843002AKI-40 REV. B APRIL 27, 2009
Power Considerations
This section provides information on power dissipation and junction temperature for the ICS843002I-40.
Equations and example calculations are also provided.
1.
Power Dissipation.
The total power dissipation for the ICS843002I-40 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for VCC = 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 * 210mA = 727.65mW
Power (outputs)MAX = 30mW/Loaded Output pair
If all outputs are loaded, the total power is 2 * 30mW = 60mW
Total Power_MAX (3.3V, with all outputs switching) = 727.65mW + 60mW = 787.65mW
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 + TA
Tj = Junction Temperature
θ
JA = Junction-to-Ambient Thermal Resistance
Pd_total = Total Device Power Dissipation (example calculation is in section 1 above)
TA = 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 37°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.788W * 37°C/W = 114.2°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 θJA for 48 Lead TQFP, Forced Convection
θ
JA by Velocity
Meters per Second
01
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
37.0°C/W
32.4°C/W
29.0°C/W
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843002AKI-40T | 制造商:ICS 制造商全稱:ICS 功能描述:175MHZ, FEMTOCLOCKS-TM VCXO BASED SONET/SDH JITTER ATTENUATOR |
| ICS843002AKI-41 | 制造商:Integrated Device Technology Inc 功能描述:IC SYNTHESIZER LVPECL 32VFQFN |
| ICS843002AKI-41LF | 功能描述:IC SYNTHESIZER LVPECL 32-VFQFPN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標準包裝: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） 供應商設備封裝:28-SOIC 包裝:管件 |
| ICS843002AKI-41LFT | 功能描述:IC SYNTHESIZER LVPECL 32-VFQFPN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:HiPerClockS™, FemtoClock™ 標準包裝: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） 供應商設備封裝:28-SOIC 包裝:管件 |
| ICS843002AKI-41T | 制造商:Integrated Device Technology Inc 功能描述:IC SYNTHESIZER LVPECL 32VFQFN |
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