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参数资料
| 型号： | ICS842023BGLF |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 2/15页 |
| 文件大小： | 0K |
| 描述： | IC CLK GEN ETHERNET 25MHZ 8TSSOP |
| 标准包装： | 96 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 类型： | 时钟/频率发生器 |
| PLL： | 是 |
| 主要目的： | 以太网 |
| 输入： | 晶体 |
| 输出： | HSTL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 无/是 |
| 频率 - 最大： | 340MHz |
| 电源电压： | 2.375 V ~ 3.465 V |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
ICS842023
FEMTOCLOCKCRYSTAL-TO-HSTL CLOCK GENERATOR
IDT / ICS HSTL CLOCK GENERATOR
10
ICS842023BG REV. A NOVEMBER 2, 2012
Power Considerations
This section provides information on power dissipation and junction temperature for the ICS842023.
Equations and example calculations are also provided.
1.
Power Dissipation.
The total power dissipation for the ICS842023 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for VDD= 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 = VDD_MAX * (IDD_MAX + IDDA_MAX) = 3.465V * (84mA + 11mA) = 329.18mW
Power (outputs)MAX = 94.32mW/Loaded Output pair
Total Power_MAX (3.465V, with all outputs switching) = 329.18mW + 94.32mW = 423.49mW
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 is 125°C.
The equation for Tj is as follows: Tj =
JA * Pd_total + TA
Tj = Junction Temperature
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
JA must be used. Assuming no air flow
and a multi-layer board, the appropriate value is 129.5°C/W per Table 7 below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.423W * 129.5°C/W = 124.8°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 Resistance JA for 8 Lead TSSOP, Forced Convection
JA vs. Air Flow
Meters per Second
01
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
129.5°C/W
125.5°C/W
123.5°C/W
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相关代理商/技术参数 |
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|---|---|
| ICS842023BGLFT | 功能描述:IC CLK GEN ETHERNET 25MHZ 8TSSOP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 专用 系列:HiPerClockS™, FemtoClock™ 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 |
| ICS842023I | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO- HSTL CLOCK GENERATOR |
| ICS842031AGI-01 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO- HSTL CLOCK GENERATOR |
| ICS842031AGI-01T | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO- HSTL CLOCK GENERATOR |
| ICS842031I-01 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO- HSTL CLOCK GENERATOR |
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