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參數(shù)資料
| 型號： | ICS8MK3-212.500AJI |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | XO, clock |
| 英文描述： | CRYSTAL OSCILLATOR, CLOCK, 212.5 MHz, LVPECL OUTPUT |
| 封裝： | ROHS COMPLIANT, HERMETIC, CERAMIC PACKAGE-6 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大小： | 124K |
| 代理商： | ICS8MK3-212.500AJI |
8Mx3AJ
www.icst.com/products/hiperclocks.html
REV. B FEBRUARY 10, 2006
3
Integrated
Circuit
Systems, Inc.
ICS8MX3
LVPECL CLOCK OSCILLATOR
PRELIMINARY
APPLICATION INFORMATION
TERMINATION FOR 3.3V LVPECL OUTPUT
The clock layout topology shown below is a typical termination
for LVPECL outputs. The two different layouts mentioned are
recommended only as guidelines.
FOUT and nFOUT are low impedance following outputs that gen-
erate ECL/LVPECL compatible outputs. Therefore, terminating re-
sistors (DC current path to ground) or current sources must be
used for functionality. These outputs are designed to drive 50
Ω
transmission lines. Matched impedance techniques should be
used to maximize operating frequency and minimize signal dis-
tortion. Figures 1A and 1B show two different layouts which are
recommended only as guidelines. Other suitable clock layouts
may exist and it would be recommended that the board designers
simulate to guarantee compatibility across all printed circuit and
clock component process variations.
FIGURE 1B. LVPECL OUTPUT TERMINATION
FIGURE 1A. LVPECL OUTPUT TERMINATION
V
CC - 2V
50
Ω
50
Ω
RTT
Z
o = 50Ω
Z
o = 50Ω
FOUT
FIN
RTT =
Z
o
1
((V
OH + VOL) / (VCC – 2)) – 2
3.3V
125
Ω
125
Ω
84
Ω
84
Ω
Z
o = 50Ω
Z
o = 50Ω
FOUT
FIN
TERMINATION FOR 2.5V LVPECL OUTPUT
Figure 2A and Figure 2B show examples of termination for 2.5V
LVPECL driver. These terminations are equivalent to terminating 50
Ω
to V
CC - 2V. For VCC = 2.5V, the VCC - 2V is very close to ground level.
The R3 in Figure 2B can be eliminated and the termination is shown
in Figure 2C.
FIGURE 2C. 2.5V LVPECL TERMINATION EXAMPLE
FIGURE 2B. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
FIGURE 2A. 2.5V LVPECL DRIVER TERMINATION EXAMPLE
R2
62.5
Zo = 50 Ohm
R1
250
+
-
2.5V
2,5V LVPECL
Driv er
R4
62.5
R3
250
Zo = 50 Ohm
2.5V
VCC=2.5V
R1
50
R3
18
Zo = 50 Ohm
+
-
2,5V LVPECL
Driv er
VCC=2.5V
2.5V
R2
50
2,5V LVPECL
Driv er
VCC=2.5V
R1
50
R2
50
2.5V
Zo = 50 Ohm
+
-
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ICS8MG3-212.500AJIT | CRYSTAL OSCILLATOR, CLOCK, 212.5 MHz, LVPECL OUTPUT |
| ICS8MJ4-240.000AJIT | CRYSTAL OSCILLATOR, CLOCK, 240 MHz, LVDS OUTPUT |
| ICS8MK4-125.000AJ | CRYSTAL OSCILLATOR, CLOCK, 125 MHz, LVDS OUTPUT |
| ICS8MK0-156.250AJI | CRYSTAL OSCILLATOR, CLOCK, 156.25 MHz, LVCMOS/TTL OUTPUT |
| ICS8MH0-212.500AJIT | CRYSTAL OSCILLATOR, CLOCK, 212.5 MHz, LVCMOS/TTL OUTPUT |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS8S58035AKILF | 功能描述:IC CLOCK BUFFER MUX 2:6 32-VFQFN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘緩沖器，驅(qū)動器 系列:HiPerClockS™ 標準包裝: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 |
| ICS8S58035AKILFT | 功能描述:IC CLOCK BUFFER MUX 2:6 32-VFQFN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘緩沖器，驅(qū)動器 系列:HiPerClockS™ 標準包裝: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 |
| ICS8S73034AGILF | 制造商:Integrated Device Technology Inc 功能描述:IC DIVIDER LVPECL 16-TSSOP |
| ICS8S73034AGILFT | 制造商:Integrated Device Technology Inc 功能描述:IC DIVIDER LVPECL 16-TSSOP |
| ICS8S73034AMILF | 制造商:Integrated Device Technology Inc 功能描述:IC DIVIDER LVPECL 16-SOIC |
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