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| 型号： | ICS874003AGI-03LFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟及定时 |
| 英文描述： | 874003 SERIES, PLL BASED CLOCK DRIVER, 3 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO20 |
| 封装： | 6.50 X 4.40 MM, 0.92 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-20 |
| 文件页数： | 3/15页 |
| 文件大小： | 212K |
| 代理商： | ICS874003AGI-03LFT |
IDT / ICS LVDS FREQUENCY TRANSLATOR/JITTER ATTENUATOR
11
ICS874003AGI-03 REV. A JANUARY 17, 2008
ICS874003I-03
LVDS FREQUENCY TRANSLATOR/JITTER ATTENUATOR
PRELIMINARY
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS874003I-03.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS874003I-03 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 (core)
MAX
= V
DD_MAX
* (I
DD_MAX
+ I
DDA_MAX
) = 3.465V * (75mA + 12mA) = 301.45mW
Power (outputs)
MAX
= V
DDO_MAX
* I
DDO_MAX
= 3.465V * 75mA = 259.87mW
Total Power
_MAX
= 301.45mW + 259.87mW = 561.32mW
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 + TA
Tj = Junction Temperature
θ
JA = Junction-to-Ambient Ther mal 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 66.6°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.561W * 66.6°C/W = 122.3°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 (single layer or multi-layer).
TABLE 6. THERMAL RESISTANCE
θθθθθ
JA
FOR
20-LEAD TSSOP, FORCED CONVECTION
θθθθθ
JA
by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
114.5°C/W
98.0°C/W
88.0°C/W
Multi-Layer PCB, JEDEC Standard Test Boards
73.2°C/W
66.6°C/W
63.5°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS874003AGLF | 功能描述:IC JITTER ATTENUATOR 20-TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1 系列:- 类型:时钟/频率发生器，多路复用器 PLL:是 主要目的:存储器，RDRAM 输入:晶体 输出:LVCMOS 电路数:1 比率 - 输入:输出:1:2 差分 - 输入:输出:无/是 频率 - 最大:400MHz 电源电压:3 V ~ 3.6 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-TSSOP（0.173"，4.40mm 宽） 供应商设备封装:16-TSSOP 包装:Digi-Reel® 其它名称:296-6719-6 |
| ICS874003AGLFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS874003BG-05LF | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS874003BG-05LFT | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
| ICS874003DG-02LF | 功能描述:IC PCI EXPRSS/JITT ATTEN 20TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™, PCI Express® (PCIe) 标准包装:1,500 系列:- 类型:时钟缓冲器/驱动器 PLL:是 主要目的:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 电源电压:3.3V 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:28-SSOP（0.209"，5.30mm 宽） 供应商设备封装:28-SSOP 包装:带卷 (TR) 其它名称:93786AFT |
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