- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄299195 > ICS889831AKT LOW SKEW, 1-TO-4 DIFFERENTIAL LVPECL-TO-LVPECL/ECL FANOUT BUFFER PDF資料下載
參數(shù)資料
| 型號(hào)： | ICS889831AKT |
| 英文描述： | LOW SKEW, 1-TO-4 DIFFERENTIAL LVPECL-TO-LVPECL/ECL FANOUT BUFFER |
| 中文描述： | 低偏移，1至4微分LVPECL-TO-LVPECL/ECL扇出緩沖器 |
| 文件頁數(shù)： | 6/16頁 |
| 文件大?。?/td> | 663K |
| 代理商： | ICS889831AKT |
889831AK
www.icst.com/products/hiperclocks.html
REV. A JUNE 16, 2005
14
Integrated
Circuit
Systems, Inc.
ICS889831
LOW SKEW, 1-TO-4
DIFFERENTIAL LVPECL-TO-LVPECL/ECL FANOUT BUFFER
θθθθθ
JAvs. 0 Velocity (Linear Feet per Minute)
0
Multi-Layer PCB, JEDEC Standard Test Boards
51.5°C/W
TABLE 6. THERMAL RESISTANCE
θθθθθ
JA
FOR
16-PIN VFQFN, FORCED CONVECTION
POWER CONSIDERATIONS
This section provides information on power dissipation and junction temperature for the ICS839831.
Equations and example calculations are also provided.
1. Power Dissipation.
The total power dissipation for the ICS889831 is the sum of the core power plus the power dissipated in the load(s).
The following is the power dissipation for V
CC = 3.63V, 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 = 3.63V * 60mA = 217.8mW
Power (outputs)
MAX = 30.94mW/Loaded Output pair
If all outputs are loaded, the total power is 4 * 30.94mW = 123.8mW
Power Dissipation at built-in terminations: Assume the input is driven by a 3.3V SSTL driver as shown in Figure 5E
and estimated approximately 1.75V drop across IN and nIN.
Total Power Dissipation for the two 50
Ω built-in terminations is: (1.75V)2 / (50Ω + 50Ω) = 30.6mW
Total Power
_MAX (3.63V, with all outputs switching) = 217.8mW + 123.8mW + 30.6mW = 372.2mW
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 HiPerClockSTM 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 a
moderate air flow of 0 linear feet per minute and a multi-layer board, the appropriate value is 51.5°C/W per Table 6 below.
Therefore, Tj for an ambient temperature of 85°C with all outputs switching is:
85°C + 0.372W * 51.5°C/W = 104°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).
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS8MH3-312.500AJT | CRYSTAL OSCILLATOR, CLOCK, 312.5 MHz, LVPECL OUTPUT |
| ICS8MJ3-156.250AJ | CRYSTAL OSCILLATOR, CLOCK, 156.25 MHz, LVPECL OUTPUT |
| ICS8MJ3-312.500AJ | CRYSTAL OSCILLATOR, CLOCK, 312.5 MHz, LVPECL OUTPUT |
| ICS8MK3-212.500AJI | CRYSTAL OSCILLATOR, CLOCK, 212.5 MHz, LVPECL OUTPUT |
| ICS8MG3-212.500AJIT | CRYSTAL OSCILLATOR, CLOCK, 212.5 MHz, LVPECL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS889832AKLF | 功能描述:IC CLK BUFFER 1:4 2GHZ 16-VFQFPN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘緩沖器，驅(qū)動(dòng)器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1 系列:HiPerClockS™ 類型:扇出緩沖器（分配），多路復(fù)用器 電路數(shù):1 比率 - 輸入:輸出:2:18 差分 - 輸入:輸出:是/無 輸入:CML，LVCMOS，LVPECL，LVTTL，SSTL 輸出:LVCMOS，LVTTL 頻率 - 最大:250MHz 電源電壓:2.375 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-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:- 其它名稱:800-1923-6 |
| ICS889832AKLFT | 功能描述:IC CLK BUFFER 1:4 2GHZ 16-VFQFPN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘緩沖器，驅(qū)動(dòng)器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1 系列:HiPerClockS™ 類型:扇出緩沖器（分配），多路復(fù)用器 電路數(shù):1 比率 - 輸入:輸出:2:18 差分 - 輸入:輸出:是/無 輸入:CML，LVCMOS，LVPECL，LVTTL，SSTL 輸出:LVCMOS，LVTTL 頻率 - 最大:250MHz 電源電壓:2.375 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-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:- 其它名稱:800-1923-6 |
| ICS889833AKLF | 功能描述:IC CLK BUFFER 1:4 2GHZ 16-VFQFPN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘緩沖器，驅(qū)動(dòng)器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1 系列:HiPerClockS™ 類型:扇出緩沖器（分配），多路復(fù)用器 電路數(shù):1 比率 - 輸入:輸出:2:18 差分 - 輸入:輸出:是/無 輸入:CML，LVCMOS，LVPECL，LVTTL，SSTL 輸出:LVCMOS，LVTTL 頻率 - 最大:250MHz 電源電壓:2.375 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-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:- 其它名稱:800-1923-6 |
| ICS889833AKLFT | 功能描述:IC CLK BUFFER 1:4 2GHZ 16-VFQFPN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘緩沖器，驅(qū)動(dòng)器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:1 系列:HiPerClockS™ 類型:扇出緩沖器（分配），多路復(fù)用器 電路數(shù):1 比率 - 輸入:輸出:2:18 差分 - 輸入:輸出:是/無 輸入:CML，LVCMOS，LVPECL，LVTTL，SSTL 輸出:LVCMOS，LVTTL 頻率 - 最大:250MHz 電源電壓:2.375 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-LQFP 供應(yīng)商設(shè)備封裝:32-TQFP（7x7） 包裝:- 其它名稱:800-1923-6 |
| ICS889834AKLF | 功能描述:IC CLK BUFFER MUX 2:4 16-VFQFPN RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘緩沖器，驅(qū)動(dòng)器 系列:HiPerClockS™ 標(biāo)準(zhǔn)包裝:74 系列:- 類型:扇出緩沖器（分配） 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 輸入:HCSL, LVCMOS, LVDS, LVPECL, LVTTL 輸出:HCSL，LVDS 頻率 - 最大:400MHz 電源電壓:3 V ~ 3.6 V 工作溫度:-40°C ~ 85°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-QFN（5x5） 包裝:管件 |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。