参数资料
型号: ICS894D115BGI-01T
厂商: IDT, Integrated Device Technology Inc
文件页数: 2/16页
文件大小: 0K
描述: IC CLK/DATA RECOVERY 20-TSSOP
标准包装: 2,500
系列: HiPerClockS™
类型: 时钟和数据恢复(CDR),多路复用器
PLL:
主要目的: STM-1,STM-4
输入: LVPECL
输出: LVPECL
电路数: 1
比率 - 输入:输出: 1:2
差分 - 输入:输出: 是/是
频率 - 最大: 622.08MHz
电源电压: 3.135 V ~ 3.465 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 20-TSSOP
包装: 带卷 (TR)
其它名称: 894D115BGI-01T
ICS894D115I-01
OC-12/STM-4 AND OC-3/STM-1 CLOCK/DATA RECOVERY DEVICE
IDT / ICS CLOCK/DATA RECOVERY DEVICE
10
ICS894D115BGI-01 REV. C OCTOBER 15, 2008
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.
FOUT and nFOUT are low impedance follower outputs that
generate ECL/LVPECL compatible outputs. 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 3A and 3B 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 3A. 3.3V LVPECL Output Termination
Figure 3B. 3.3V LVPECL Output Termination
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
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