收藏本站
843081AGI-01
www.idt.com
REV. C JULY 25, 2010
10
ICS843081I-01
FEMTOCLOCKSCRYSTAL-TO-
3.3V, 2.5V LVPECL CLOCK MULTIPLIER
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS843081I-01.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS843081I-01 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for V
CC = 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_TYP = 3.465V * 78mA = 270.27mW
Power (outputs)
MAX = 30mW/Loaded Output pair
Total Power
_MAX (3.465V, with all outputs switching) = 270.27mW + 30mW = 300.27mW
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 the 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)
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 1 meter per second and a multi-layer board, the appropriate value is 90.5°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.300W * 90.5°C/W = 112°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
8-PIN TSSOP, FORCED CONVECTION
θθθθθ
JA by Velocity (Meters per Second)
0
1
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
101.7°C/W
90.5°C/W
89.8°C/W
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
ICS8430AYI-61LF IC SYNTHESIZER LVPECL 32-LQFP
ICS8430S07AKILF IC CLK GENERATOR PLL 32VFQFN
ICS8430S10BYI-02LF IC CLK GENERATOR PLL 48TQFP
ICS84314AY-02LFT IC SYNTHESIZER 700MHZ 32-LQFP
ICS843156AKILF IC CLK GENERATOR 32VFQFP
ICS843156AKLF IC CLK GENERATOR 32VFQFP
ICS843202AYILF IC SYNTHESIZER 680MHZ 32-LQFP
ICS843204AGILF IC SYNTHESIZER LVPECL 48-TSSOP
相关代理商/技术参数
ICS843081AGI-01LFT 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK MULTIPLIER
ICS843081AGI-01T 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS⑩ CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK MULTIPLIER
ICS843081AGI-33LF 功能描述:IC CLK MULTIPLIER LVPECL 8-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
ICS843081AGI-33LFT 功能描述:IC CLK MULTIPLIER LVPECL 8-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
ICS843081I-01 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS? CRYSTAL-TO-3.3V, 2.5V LVPECL CLOCK MULTIPLIER
ICS8430AY-51 制造商:ICS 制造商全称:ICS 功能描述:600MHZ, LOW JITTER LVCMOS/ LVTTL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
ICS8430AY-51T 制造商:ICS 制造商全称:ICS 功能描述:600MHZ, LOW JITTER LVCMOS/ LVTTL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
ICS8430AY-61 制造商:Integrated Device Technology Inc 功能描述: