參數(shù)資料
型號(hào): ICS854S036AKLFT
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 4/16頁(yè)
文件大小: 0K
描述: IC CLK BUFF 1:3/1:6 2GHZ 32VFQFN
標(biāo)準(zhǔn)包裝: 1
系列: HiPerClockS™
類型: 扇出緩沖器(分配)
電路數(shù): 2
比率 - 輸入:輸出: 1:3,1:6
差分 - 輸入:輸出: 是/是
輸入: CML,LVDS,LVPECL,SSTL
輸出: LVDS
頻率 - 最大: 2GHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 32-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 32-VFQFPN(5x5)
包裝: 標(biāo)準(zhǔn)包裝
其它名稱: 800-2253-6
ICS854S036 Data Sheet
LOW SKEW, DUAL, DIFFERENTIAL-TO-LVDS FANOUT BUFFER
ICS854S036 REVISION A NOVEMBER 16, 2009
12
2009 Integrated Device Technology, Inc.
Power Considerations
This section provides information on power dissipation and junction temperature for the ICS854S036.
Equations and example calculations are also provided.
1.
Power Dissipation.
The total power dissipation for the ICS854S036 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 = V
DD_MAX * IDD_MAX = 3.465V * 210mA = 727.65mW
2. Junction Temperature.
Junction temperature, Tj, is the temperature at the junction of the bond wire and bond pad directly affects the reliability of the device. The
maximum recommended junction temperature for HiPerClockS devices is 125°C. Limiting the internal transistor junction temperature, Tj, to
125°C ensures that the bond wire and bond pad temperature remains below 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 no air flow and
a multi-layer board, the appropriate value is 42.7°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.728W * 42.7°C/W = 101.1°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 6. Thermal Resistance θJA for 32 Lead VFQFN, Forced Convection
θ
JA by Velocity
Meters per Second
01
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
42.7°C/W
37.3°C/W
33.5°C/W
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