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参数资料
| 型号： | ICS843034AYLF |
| 厂商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 750 MHz, OTHER CLOCK GENERATOR, PQFP48 |
| 封装： | 7 X 7 MM, 1.40 MM HEIGHT, ROHS COMPLIANT, MS-026BBC, LQFP-48 |
| 文件页数： | 8/24页 |
| 文件大小： | 726K |
| 代理商： | ICS843034AYLF |
IDT / ICS 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
16
ICS843034AY REV B JULY 18, 2006
ICS843034
FEMTOCOCKS MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
PRELIMINARY
V
CC - 2V
50
50
RTT
Z
o = 50
Z
o = 50
FOUT
FIN
RTT =
Z
o
1
((V
OH + VOL) / (VCC – 2)) – 2
3.3V
125
125
84
84
Z
o = 50
Z
o = 50
FOUT
FIN
The clock layout topology shown below is a typical termination
for LVPECL outputs. The two different layouts mentioned are
recommended only as guidelines.
FOUTx and nFOUTx are low impedance follower outputs that
generate ECL/LVPECL compatible outputs. Therefore, terminat-
ing resistors (DC current path to ground) or current sources must
be used for functionality. These outputs are designed to drive
FIGURE 7B. LVPECL OUTPUT TERMINATION
FIGURE 7A. LVPECL OUTPUT TERMINATION
50
transmission lines. Matched impedance techniques should
be used to maximize operating frequency and minimize signal
distortion.
Figures 7A and 7B show two different layouts which
are recommended only as guidelines. Other suitable clock lay-
outs may exist and it would be recommended that the board de-
signers simulate to guarantee compatibility across all printed cir-
cuit and clock component process variations.
TERMINATION FOR 3.3V LVPECL OUTPUT
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS843034AYLFT | 功能描述:IC CLK SYNTHESIZER LVPECL 48LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™, FemtoClock™ 标准包装:27 系列:Precision Edge® 类型:频率合成器 PLL:是 输入:PECL，晶体 输出:PECL 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/是 频率 - 最大:800MHz 除法器/乘法器:是/无 电源电压:3.135 V ~ 5.25 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ICS843034AYT | 制造商:ICS 制造商全称:ICS 功能描述:MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER |
| ICS843051 | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
| ICS8430-51 | 制造商:ICS 制造商全称:ICS 功能描述:600MHZ, LOW JITTER LVCMOS/ LVTTL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
| ICS843051AG | 制造商:ICS 制造商全称:ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR |
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