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參數(shù)資料
| 型號(hào)： | ICS843051AGLFT |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 4/17頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CLOCK GENERATOR LVPECL 8TSSOP |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 類型： | 時(shí)鐘/頻率合成器，時(shí)鐘發(fā)生器 |
| PLL： | 是 |
| 輸入： | 晶體 |
| 輸出： | LVPECL |
| 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： | 161.13MHz |
| 除法器/乘法器： | 是/無 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | 0°C ~ 70°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-TSSOP（0.173"，4.40mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-TSSOP |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 843051AGLFT |
ICS843051AG REVISION A OCTOBER 13, 2010
12
2010 Integrated Device Technology, Inc.
ICS843051 Data Sheet
FEMTOCLOCK CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR
Power Considerations
This section provides information on power dissipation and junction temperature for the ICS843051.
Equations and example calculations are also provided.
1.
Power Dissipation.
The total power dissipation for the ICS843051 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 * 85mA = 294.5mW
Power (outputs)MAX = 30mW/Loaded Output pair
Total Power_MAX (3.465V, with all outputs switching) = 294.5mW + 30mW = 324.5mW
2. Junction Temperature.
Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad directly affects the reliability of the device. The
maximum recommended junction temperature is 125°C. Limiting the internal transistor junction temperature, Tj, to 125°C ensures that the bond
wire and bond pad temperature remains below 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 a moderate air
flow of 1 meter per second and a multi-layer board, the appropriate value is 90.5°C/W per Table 7 below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.324W * 90.5°C/W = 99.3°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 (multi-layer).
Table 7. Thermal Resitance θJA for 8 Lead TSSOP, Forced Convection
θ
JA vs. Air Flow
Meters per Second
01
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
101.7°C/W
90.5°C/W
89.8°C/W
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843051AGT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS8430-61 | 制造商:ICS 制造商全稱:ICS 功能描述:500MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS8430-62 | 制造商:IDT 制造商全稱:Integrated Device Technology 功能描述:500MHz, Crystal-to-3.3V, 2.5V Differential LVPECL Frequency Synthesizer |
| ICS843071AGI | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO- LVPECL CLOCK GENERATOR |
| ICS843071AGILF | 功能描述:IC CLOCK GENERATOR LVPECL 8TSSOP 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:1,000 系列:- 類型:時(shí)鐘/頻率合成器，扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
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