参数资料
型号: ICS83940DYLFT
厂商: IDT, Integrated Device Technology Inc
文件页数: 2/16页
文件大小: 0K
描述: IC CLOCK BUFFER MUX 2:18 32-LQFP
标准包装: 1,000
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: 0°C ~ 70°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: 带卷 (TR)
其它名称: 83940DYLFT
83940DY
www.idt.com
REV. B AUGUST 9, 2010
10
ICS83940D
LOW SKEW, 1-TO-18
LVPECL-TO-LVCMOS / LVTTL FANOUT BUFFER
APPLICATION INFORMATION
Figure 1 shows how the differential input can be wired to accept
single ended levels. The reference voltage V_REF = V
DD/2 is
generated by the bias resistors R1, R2 and C1. This bias circuit
should be located as close as possible to the input pin. The ratio
FIGURE 1. SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT
WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LEVELS
of R1 and R2 might need to be adjusted to position the V_REF in
the center of the input voltage swing. For example, if the input
clock swing is only 2.5V and V
DD = 3.3V, V_REF should be 1.25V
and R2/R1 = 0.609.
VDD
R2
1K
V_REF
C1
0.1u
R1
1K
Single Ended Clock Input
PCLK
nPCLK
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