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| 型号： | ICS844003BGI-01LF |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 680 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| 封装： | 4.40 X 7.80 MM, 0.92MM HEIGHT, ROHS COMPLIANT, TSSOP-24 |
| 文件页数： | 4/15页 |
| 文件大小： | 763K |
| 代理商： | ICS844003BGI-01LF |
844003BGI-0I
www.icst.com/products/hiperclocks.html
REV. A MARCH 28, 2006
12
Integrated
Circuit
Systems, Inc.
ICS844003BI-01
FEMTOCLOCKS CRYSTAL-TO-LVDS
FREQUENCY SYNTHESIZER
PRELIMINARY
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS844003BI-01.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS844003BI-01 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_
MAX = VDD_MAX * (IDD_MAX + IDDA_MAX) = 3.465V * 124mA = 429.6mW
Power (outputs)
MAX = VDDO_MAX * IDDO_MAX = 3.465V * 46mA = 159.3mW
Total Power
_MAX = 427.6mW + 157.6mW = 588.9mW
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
q
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 65°C/W per
Table 7 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.589W * 32.3°C/W = 104°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).
TABLE 7. THERMAL RESISTANCE
θθθθθ
JA
FOR
24-PIN TSSOP, FORCED CONVECTION
θθθθθ
JA by Velocity (Linear Feet per Minute)
0
200
500
Multi-Layer PCB, JEDEC Standard Test Boards
37.6°C/W
32.3°C/W
29.9°C/W
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| ICS844003BGI-01LF | 680 MHz, OTHER CLOCK GENERATOR, PDSO24 |
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| ICS844004AGI-01 | 156.5 MHz, OTHER CLOCK GENERATOR, PDSO24 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS844003BGI-01LFT | 功能描述:IC SYNTHESIZER 3LVDS 24-ETSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS844003EGI-01LF | 功能描述:IC SYNTHESIZER 2LVDS 24-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:FemtoClock™ 标准包装:1,000 系列:Precision Edge® 类型:时钟/频率合成器 PLL:无 输入:CML，PECL 输出:CML 电路数:1 比率 - 输入:输出:2:1 差分 - 输入:输出:是/是 频率 - 最大:10.7GHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-VFQFN 裸露焊盘，16-MLF? 供应商设备封装:16-MLF?（3x3） 包装:带卷 (TR) 其它名称:SY58052UMGTRSY58052UMGTR-ND |
| ICS844004AG-01LF | 制造商:Integrated Device Technology Inc 功能描述: |
| ICS844004AGI-04LF | 功能描述:IC SYNTHESIZER 4LVDS 24-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:27 系列:Precision Edge® 类型:频率合成器 PLL:是 输入:PECL，晶体 输出:PECL 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/是 频率 - 最大:800MHz 除法器/乘法器:是/无 电源电压:3.135 V ~ 5.25 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ICS844004AGI-04LFT | 功能描述:IC SYNTHESIZER 4LVDS 24-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:27 系列:Precision Edge® 类型:频率合成器 PLL:是 输入:PECL，晶体 输出:PECL 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/是 频率 - 最大:800MHz 除法器/乘法器:是/无 电源电压:3.135 V ~ 5.25 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
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