参数资料
型号: ICS87158AGLF
厂商: IDT, Integrated Device Technology Inc
文件页数: 16/17页
文件大小: 0K
描述: IC CLOCK GEN 1-6 HCSL 48-TSSOP
标准包装: 39
系列: HiPerClockS™
类型: 时钟发生器
PLL:
输入: HCSL,LVDS,LVHSTL,LVPECL,SSTL
输出: HCSL,LVCMOS,LVTTL
电路数: 1
比率 - 输入:输出: 1:7
差分 - 输入:输出: 是/是
频率 - 最大: 600MHz
除法器/乘法器: 是/是
电源电压: 3.135 V ~ 3.465 V
工作温度: 0°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 48-TFSOP(0.240",6.10mm 宽)
供应商设备封装: 48-TSSOP
包装: 管件
其它名称: 87158AGLF
87158AG
www.idt.com
REV. C JULY 25, 2010
8
ICS87158
1-TO-6, LVPECL-TO-HCSL/LVCMOS
÷1, ÷2, ÷4 CLOCK GENERATOR
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
VDD
R2
1K
V_REF
C1
0.1u
R1
1K
Single Ended Clock Input
PCLK
nPCLK
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.
INPUTS:
PCLK/nPCLK INPUT:
For applications not requiring the use of a differential input,
both the PCLK and nPCLK pins can be left floating. Though
not required, but for additional protection, a 1k
Ω resistor can
be tied from PCLK to ground.
LVCMOS CONTROL PINS:
All control pins have internal pull-ups or pull-downs; additional
resistance is not required but can be added for additional
protection. A 1k
Ω resistor can be used.
RECOMMENDATIONS FOR UNUSED INPUT AND OUTPUT PINS
OUTPUTS:
LVCMOS OUTPUT:
All unused LVCMOS outputs can be left floating. There should
be no trace attached.
HCSL OUTPUT
All unused HCSL outputs can be left floating. We recommend
that there is no trace attached. Both sides of the differential
output pair should either be left floating or terminated.
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