参数资料
型号: ICS83PR226BKI-01LFT
厂商: IDT, Integrated Device Technology Inc
文件页数: 5/23页
文件大小: 0K
描述: IC SYNTHESIZER PROGR 10-VFQFPN
标准包装: 2,500
系列: HiPerClockS™, FemtoClock™
类型: 时钟/频率合成器
PLL:
输入: 晶体
输出: LVPECL
电路数: 1
比率 - 输入:输出: 1:1
差分 - 输入:输出: 无/是
频率 - 最大: 213.33MHz
除法器/乘法器: 是/无
电源电压: 2.375 V ~ 3.465 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 10-VQFN 裸露焊盘
供应商设备封装: 10-VFQFPN(5x7)
包装: 带卷 (TR)
其它名称: 83PR226BKI-01LFT
ICS83PR226BKI-01 REVISION B AUGUST 10, 2010
13
2010 Integrated Device Technology, Inc.
ICS83PR226I-01 Data Sheet
PROGRAMMABLE FEMTOCLOCK LVPECL OSCILLATOR REPLACEMENT
Termination for 3.3V LVPECL Outputs
The clock layout topology shown below is a typical termination for
LVPECL outputs. The two different layouts mentioned are
recommended only as guidelines.
The differential outputs are low impedance follower outputs that
generate ECL/LVPECL compatible signals. Therefore, terminating
resistors (DC current path to ground) or current sources must be
used for functionality. These outputs are designed to drive 50
transmission lines. Matched impedance techniques should be used
to maximize operating frequency and minimize signal distortion.
Figures 4A and 4B 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 4A. 3.3V LVPECL Output Termination
Figure 4B. 3.3V LVPECL Output Termination
3.3V
V
CC - 2V
R1
50
R2
50
RTT
Z
o = 50
Z
o = 50
+
_
RTT =
* Z
o
1
((V
OH + VOL) / (VCC – 2)) – 2
3.3V
LVPECL
Input
R1
84
R2
84
3.3V
R3
125
R4
125
Z
o = 50
Z
o = 50
LVPECL
Input
3.3V
+
_
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