参数资料
型号: CDCLVP2104RHDR
厂商: Texas Instruments
文件页数: 4/22页
文件大小: 0K
描述: IC CLOCK BUFFER 2:8 2GHZ 28-VQFN
标准包装: 3,000
类型: 扇出缓冲器(分配)
电路数: 2
比率 - 输入:输出: 2:8
差分 - 输入:输出: 是/是
输入: LVCMOS,LVDS,LVPECL,LVTTL
输出: LVPECL
频率 - 最大: 2GHz
电源电压: 2.375 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-VFQFN 裸露焊盘
供应商设备封装: 28-VQFN-EP(5x5)
包装: 带卷 (TR)
Board
Supply
Chip
Supply
C
10 F
m
C
1 F
m
C
0.1 F(x6)
m
FerriteBead
V
CC
(a) Output DC Termination
(b) Output AC Termination
CDCLVP2104
LVPECL
86 W
50 W
V
BB
CDCLVP2104
LVPECL
250 W
62.5 W
250 W
62.5 W
V
CC
V
CC
SCAS889A
– OCTOBER 2009 – REVISED AUGUST 2011
Figure 13 illustrates this recommended power-supply decoupling method.
Figure 13. Power-Supply Decoupling
LVPECL Output Termination
The CDCLVP2104 is an open emitter for LVPECL outputs. Therefore, proper biasing and termination are
required to ensure correct operation of the device and to minimize signal integrity. The proper termination for
LVPECL outputs is a 50
to (VCC –2) V, but this dc voltage is not readily available on PCB. Therefore, a
Thevenin equivalent circuit is worked out for the LVPECL termination in both direct-coupled (dc) and ac-coupled
configurations. These configurations are shown in Figure 14a and b for VCC = 2.5 V and Figure 15a and b for VCC
= 3.3 V, respectively. It is recommended to place all resistive components close to either the driver end or the
receiver end. If the supply voltage for the driver and receiver is different, ac coupling is required.
Figure 14. LVPECL Output DC and AC Termination for VCC = 2.5 V
12
Copyright
2009–2011, Texas Instruments Incorporated
Product Folder Link(s): CDCLVP2104
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CDCLVP2106RHAR 功能描述:时钟缓冲器 Low Jitter Dual 1:6 Univ-to-LVPECL Bfr RoHS:否 制造商:Texas Instruments 输出端数量:5 最大输入频率:40 MHz 传播延迟(最大值): 电源电压-最大:3.45 V 电源电压-最小:2.375 V 最大功率耗散: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LLP-24 封装:Reel
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