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参数资料
| 型号： | 844031AG-01LFT |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 340 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 封装： | 4.40 X 3 MM, 0.925 MM HEIGHT, ROHS COMPLIANT, MO-153, TSSOP-8 |
| 文件页数： | 2/13页 |
| 文件大小： | 278K |
| 代理商： | 844031AG-01LFT |
IDT / ICS LVDS CLOCK GENERATOR
10
ICS844031BG-01 REV. A MAY 1, 2008
ICS844031-01
FEMTOCLOCKS CRYSTAL-TO-LVDS CLOCK GENERATOR
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS844031-01.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS844031-01 is the sum of the core power plus the analog 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 + 10mA) = 294.5mW
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
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 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 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 + 0.294W * 129.5°C/W = 108.1°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
8-LEAD TSSOP, FORCED CONVECTION
θθθθθ
JA
by Velocity (Meters per Second)
0
1
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
129.5°C/W
125.5°C/W
123.5°C/W
相关PDF资料 |
PDF描述 |
|---|---|
| 844031AG-01LF | 340 MHz, OTHER CLOCK GENERATOR, PDSO8 |
| 84450-1 | 50 CONTACT(S), MALE, RIGHT ANGLE TWO PART BOARD CONNECTOR, SOLDER |
| 84476-1 | 4 CONTACT(S), MALE, STRAIGHT TWO PART BOARD CONNECTOR, SURFACE MOUNT |
| 84476-2 | 6 CONTACT(S), MALE, STRAIGHT TWO PART BOARD CONNECTOR, SURFACE MOUNT |
| 84476-3 | 16 CONTACT(S), MALE, STRAIGHT TWO PART BOARD CONNECTOR, SURFACE MOUNT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 844031BG-01LF | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| 844031BG-01LFT | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| 844031BGI-01 | 制造商:Integrated Device Technology Inc 功能描述:PLL Clock Generator Single 8-Pin TSSOP Tube 制造商:Integrated Device Technology Inc 功能描述:8 TSSOP - Bulk |
| 844031BGI-01LF | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| 844031BGI-01LFT | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
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