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参数资料
| 型号： | ICS843003AGLF |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 700 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| 封装： | 4.40 X 7.80 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-24 |
| 文件页数： | 8/21页 |
| 文件大小： | 1125K |
| 代理商： | ICS843003AGLF |
ICS843003
FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
IDT / ICS LVPECL FREQUENCY SYNTHESIZER
16
ICS843003AG REV. A FEBRUARY 19, 2008
Power Considerations
This section provides information on power dissipation and junction temperature for the ICS843003.
Equations and example calculations are also provided.
1.
Power Dissipation.
The total power dissipation for the ICS843003 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 * 158mA = 547.5mW
Power (outputs)MAX = 30mW/Loaded Output pair
If all outputs are loaded, the total power is 3 * 30mW = 90mW
Total Power_MAX (3.3V, with all outputs switching) = 547.5mW + 90mW = 637.5mW
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 a moderate
air flow of 1 meter per second and a multi-layer board, the appropriate value is 65°C/W per Table 8below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.638W * 65°C/W = 111.5°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 8. Thermal Resitance θJA for 24 Lead TSSOP, Forced Convection
θ
JA vs. Air Flow
Meters per Second
01
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
70°C/W
65
62
相关PDF资料 |
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| ICS843004AG-01LFT | 156.25 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AG-02LFT | 637.5 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AG-02LF | 680 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AGI-01 | 170 MHz, OTHER CLOCK GENERATOR, PDSO24 |
| ICS843004AGI-04LFT | 680 MHz, OTHER CLOCK GENERATOR, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS843003AGLFT | 功能描述:IC SYNTHESIZER LVPECL 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: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 |
| ICS843003AGT | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003AI01 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003I-01 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843003I-09 | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:FEMTOCLOCKS? CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
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