参数资料
型号: ICS85102AGILF
厂商: IDT, Integrated Device Technology Inc
文件页数: 4/16页
文件大小: 0K
描述: IC CLOCK BUFFER MUX 2:2 16-TSSOP
特色产品: HCSL Buffers
标准包装: 72
系列: HiPerClockS™
类型: 扇出缓冲器(分配),多路复用器
电路数: 1
比率 - 输入:输出: 2:2
差分 - 输入:输出: 是/是
输入: HCSL,LVCMOS,LVDS,LVHSTL,LVPECL,LVTTL,SSTL
输出: HCSL
频率 - 最大: 500MHz
电源电压: 2.97 V ~ 3.63 V
工作温度: -40°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: 管件
其它名称: 800-1150
800-1150-5
800-1150-ND
85102AGILF
IDT / ICS 0.7V HCSL FANOUT BUFFER
12
ICS85102AGI REV. A JUNE 10, 2008
ICS85102I
LOW SKEW, 1-TO-2, DIFFERENTIAL/LVCMOS-TO-0.7V HCSL FANOUT BUFFER
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS85102I.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS85102I 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 + 10% = 3.63V, which gives worst case results.
NOTE: Please refer to Section 3 for details on calculating power dissipated in the load.
Power (core)
MAX
= V
DD_MAX
* I
DD_MAX
= 3.63V * 27mA = 98.01mW
Power (outputs)
MAX
= 47.3mW/Loaded Output pair
If all outputs are loaded, the total power is 2 * 47.3mW = 94.6mW
Total Power
_MAX
(3.63V, with all outputs switching) = 98.01mW + 94.6mW = 192.61mW
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 100.3°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.193W * 100.3°C/W = 104.4°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 6. THERMAL RESISTANCE
θθθθθ
JA
FOR
16-LEAD TSSOP, FORCED CONVECTION
θθθθθ
JA
by Velocity (Meters per Second)
0
1
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
100.3°C/W
96.0°C/W
93.9°C/W
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