參數(shù)資料
型號: ICS873991AY-147LF
廠商: INTEGRATED DEVICE TECHNOLOGY INC
元件分類: 時鐘及定時
英文描述: LOW VOLTAGE, LVCMOS/LVPECL-TO LVPECL/ECL CLOCK GENERATOR
中文描述: 873991 SERIES, LOW SKEW CLOCK DRIVER, 13 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PQFP52
封裝: 10 X 10 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, MS-026BCC, LQFP-52
文件頁數(shù): 12/17頁
文件大小: 292K
代理商: ICS873991AY-147LF
IDT
/ ICS
LVPECL/ECL CLOCK GENERATOR
12
ICS873991AY-147 REV. A AUGUST 10, 2007
ICS873991-147
LOW VOLTAGE, LVCMOS/LVPECL-TO-LVPECL/ECL CLOCK GENERATOR
PRELIMINARY
T
ABLE
7. T
HERMAL
R
ESISTANCE
θ
JA
FOR
52-P
IN
LQFP F
ORCED
C
ONVECTION
P
OWER
C
ONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS873991-147.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS873991-147 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
= V
CC_MAX
* I
EE_MAX
= 3.465V * 150mA =
519.75mW
Power (outputs)
MAX
=
30mW/Loaded Output pair
If all outputs are loaded, the total power is 14 * 30mW =
420mW
Total Power
_MAX
(3.465V, with all outputs switching) =
519.75mW + 420mW =
939.75mW
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 + T
A
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
must be used. Assuming a
moderate air flow of 1 meter per second and a multi-layer board, the appropriate value is 55.5°C/W per Table 7 below.
Therefore, Tj for an ambient temperature of 70°C with all outputs switching is:
70°C + 0.940W * 55.5°C/W = 122.2°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).
θ
JA
by Velocity (Meters per Second)
0
1
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
63.7°C/W
55.5°C/W
52.4°C/W
相關(guān)PDF資料
PDF描述
ICS873991AY-147LFT LOW VOLTAGE, LVCMOS/LVPECL-TO LVPECL/ECL CLOCK GENERATOR
ICS8741004 DIFFERENTIAL-TO-LVDS/0.7V DIFFERENTIAL PCI EXPRESS⑩ JITTER ATTENUATOR
ICS8741004AG DIFFERENTIAL-TO-LVDS/0.7V DIFFERENTIAL PCI EXPRESS⑩ JITTER ATTENUATOR
ICS8741004AGLF DIFFERENTIAL-TO-LVDS/0.7V DIFFERENTIAL PCI EXPRESS⑩ JITTER ATTENUATOR
ICS98ULPA877A 1.8V Low-Power Wide-Range Frequency Clock Driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICS873991AY-147LFT 功能描述:IC CLK GEN LV ECL LVPECL 52-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類型:頻率合成器 PLL:是 輸入:PECL,晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/是 頻率 - 最大:800MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:28-SOIC(0.295",7.50mm 寬) 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
ICS873991AYLF 功能描述:IC CLK GEN LV LVPECL/ECL 52-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-LSSOP(0.175",4.40mm 寬) 供應(yīng)商設(shè)備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR
ICS873991AYLFT 功能描述:IC CLK GEN LV LVPECL 52-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時鐘/頻率合成器,扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP(8x8) 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT
ICS873995AYLF 功能描述:IC ZD/MULT/DIVIDER 48-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時鐘/頻率合成器,扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP(8x8) 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT
ICS873995AYLFT 功能描述:IC ZD/MULT/DIVIDER 48-LQFP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1,000 系列:- 類型:時鐘/頻率合成器,扇出分配 PLL:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 除法器/乘法器:- 電源電壓:- 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:56-VFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:56-VFQFP-EP(8x8) 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT