参数资料
型号: ICS83940DYI-01LF
厂商: IDT, Integrated Device Technology Inc
文件页数: 5/18页
文件大小: 0K
描述: IC CLOCK BUFFER MUX 2:18 32-LQFP
标准包装: 250
系列: HiPerClockS™
类型: 扇出缓冲器(分配),多路复用器
电路数: 1
比率 - 输入:输出: 2:18
差分 - 输入:输出: 是/无
输入: CML,LVCMOS,LVPECL,LVTTL,SSTL
输出: LVCMOS,LVTTL
频率 - 最大: 250MHz
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: 32-LQFP
供应商设备封装: 32-TQFP(7x7)
包装: 托盘
其它名称: 83940DYI-01LF
ICS83940DYI-01 REVISION A SEPTEMBER 27, 2010
13
2010 Integrated Device Technology, Inc.
ICS83940I-01 Data Sheet
LOW SKEW, 1-TO-18 LVPECL-TO-LVCMOS/LVTTL FANOUT BUFFER
LVPECL Clock Input Interface
The PCLK /nPCLK accepts LVPECL, SSTL and other differential
signals. Both differential signals must meet the VPP and VCMR input
requirements. Figures 2A to 2C show interface examples for the
PCLK/nPCLK input driven by the most common driver types. The
input interfaces suggested here are examples only. If the driver is
from another vendor, use their termination recommendation. Please
consult with the vendor of the driver component to confirm the driver
termination requirements.
Figure 2A. PCLK/nPCLK Input Driven by a
3.3V LVPECL Driver
Figure 2C. PCLK/nPCLK Input Driven by an
SSTL Driver
Figure 2B. PCLK/nPCLK Input Driven by a
3.3V LVPECL Driver with AC Couple
Recommendations for Unused Input and Output Pins
Inputs:
PCLK/nPCLK Inputs
For applications not requiring the use of the differential input, both
PCLK and nPCLK can be left floating. Though not required, but for
additional protection, a 1k
resistor can be tied from PCLK to
ground.
LVCMOS_CLK Input
For applications not requiring the use of a clock input, it can be left
floating. Though not required, but for additional protection, a 1k
resistor can be tied from the LVCMOS_CLK input to ground.
LVCMOS Control Pins
All control pins have internal pulldowns; additional resistance is not
required but can be added for additional protection. A 1k
resistor
can be used.
Outputs:
LVCMOS Outputs
All unused LVCMOS output can be left floating. There should be no
trace attached.
R3
125
R4
125
R1
84
R2
84
3.3V
Zo = 50
Zo = 50
PCLK
nPCLK
3.3V
LVPECL
Input
PCLK
nPCLK
LVPECL
Input
SSTL
2.5V
Zo = 60
Zo = 60
2.5V
3.3V
R1
120
R2
120
R3
120
R4
120
R3
84
R4
84
R1
125
R2
125
R5
100 - 200
R6
100 - 200
PCLK
nPCLK
3.3V LVPECL
3.3V
Zo = 50
Zo = 50
3.3V
LVPECL
Input
C1
C2
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