- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄9145 > ICS843004AGLF (IDT, Integrated Device Technology Inc)IC SYNTHESIZER LVPECL 24-TSSOP PDF資料下載
參數(shù)資料
| 型號： | ICS843004AGLF |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 7/20頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SYNTHESIZER LVPECL 24-TSSOP |
| 標準包裝： | 62 |
| 系列： | HiPerClockS™, FemtoClock™ |
| 類型： | 頻率合成器 |
| PLL： | 帶旁路 |
| 輸入： | 晶體 |
| 輸出： | LVPECL |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 1:4 |
| 差分 - 輸入:輸出： | 無/是 |
| 頻率 - 最大： | 226.66MHz |
| 除法器/乘法器： | 是/無 |
| 電源電壓： | 3.135 V ~ 3.465 V |
| 工作溫度： | -30°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 24-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 24-TSSOP |
| 包裝： | 管件 |
| 其它名稱： | 800-1953-5 843004AGLF ICS843004AGLF-ND |
ICS843004
FEMTOCLOCKS LVCMOS/CRYSTAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER
IDT / ICS 3.3V LVPECL FREQUENCY SYNTHESIZER
15
ICS843004AG REV. C JANUARY 19, 2008
Power Considerations
This section provides information on power dissipation and junction temperature for the ICS843004.
Equations and example calculations are also provided.
1.
Power Dissipation.
The total power dissipation for the ICS843004 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for VCC= 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 * 135mA = 467.8mW
Power (outputs)MAX = 30mW/Loaded Output pair
If all outputs are loaded, the total power is 4 * 30mW = 120mW
Total Power_MAX (3.465V, with all outputs switching) = 467.8mW + 120mW = 587.8mW
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 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)
TA = 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 65°C/W per Table 6below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.588W * 65°C/W = 123.2°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).
Table 6. Thermal Resistance θJA for 24 Lead TSSOP, Forced Convection
θ
JA vs. Air Flow
Meters per Second
01
2.5
Multi-Layer PCB, JEDEC Standard Test Boards
70°C/W
65°C/W
62°C/W
相關PDF資料 |
PDF描述 |
|---|---|
| V375A8H300BL2 | CONVERTER MOD DC/DC 8V 300W |
| V375A8H300BL | CONVERTER MOD DC/DC 8V 300W |
| ICS841664AGILF | IC CLOCK GENERATOR 28-TSSOP |
| V375A8H300B2 | CONVERTER MOD DC/DC 8V 300W |
| V375A8H300B | CONVERTER MOD DC/DC 8V 300W |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ICS843004AGLFT | 功能描述:IC SYNTHESIZER LVPECL 24-TSSOP 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™, FemtoClock™ 標準包裝: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 供應商設備封裝:56-VFQFP-EP（8x8） 包裝:帶卷 (TR) 其它名稱:844S012AKI-01LFT |
| ICS843004AGT | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS⑩ LVCMOS/CRYSTAL-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004AI01 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004AI04 | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL/LVCMOS-TO- 3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843004I | 制造商:ICS 制造商全稱:ICS 功能描述:FEMTOCLOCKS-TM CRYSTAL-TO- 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
發(fā)布緊急采購，3分鐘左右您將得到回復。