D
參數(shù)資料
型號(hào): ICS813001AGILFT
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 6/18頁(yè)
文件大?。?/td> 0K
描述: IC VCXO DUAL MULTIPLER 24-TSSOP
標(biāo)準(zhǔn)包裝: 2,500
系列: HiPerClockS™, FemtoClock™
類(lèi)型: 多路復(fù)用器,壓控晶體振蕩器(VCXO)
PLL: 帶旁路
輸入: HCSL,LVCMOS,LVDS,LVHSTL,LVPECL,LVTTL,SSTL
輸出: LVPECL
電路數(shù): 1
比率 - 輸入:輸出: 5:1
差分 - 輸入:輸出: 是/是
頻率 - 最大: 640MHz
除法器/乘法器: 是/是
電源電壓: 2.375 V ~ 3.465 V
工作溫度: -40°C ~ 85°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 24-TSSOP(0.173",4.40mm 寬)
供應(yīng)商設(shè)備封裝: 24-TSSOP
包裝: 帶卷 (TR)
其它名稱(chēng): 813001AGILFT
813001AGI
www.icst.com/products/hiperclocks.html
REV. A OCTOBER 31, 2012
14
Integrated
Circuit
Systems, Inc.
ICS813001I
DUAL VCXO W/3.3V, 2.5V LVPECL
FEMTOCLOCK PLL
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS813001I.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS813001I 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_MAX = 3.465V * 130mA = 450.45mW
Power (outputs)
MAX = 30mW/Loaded Output pair
Total Power
_MAX (3.465V, with output switching) = 450.45mW + 30mW = 480.5mW
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 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 70°C/W per Table 8 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.481W * 65°C/W = 116.3°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 8.THERMAL RESISTANCE
θθθθθ
JA FOR 24-PIN TSSOP, FORCED CONVECTION
θθθθθ
JA by Velocity (Meters per Second)
0
1
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
70°C/W
65°C/W
62°C/W
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參數(shù)描述
ICS813001AGIT 制造商:ICS 制造商全稱(chēng):ICS 功能描述:DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK-TM PLL
ICS813001I 制造商:ICS 制造商全稱(chēng):ICS 功能描述:DUAL VCXO W/3.3V, 2.5V LVPECL FEMTOCLOCK-TM PLL
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