1-TO-8 LVPECL-
參數(shù)資料
型號: ICS87159AGLF
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 16/17頁
文件大小: 0K
描述: IC CLOCK GEN 1-8 LVCMOS 56-TSSOP
標準包裝: 34
系列: HiPerClockS™
類型: 時鐘發(fā)生器
PLL:
輸入: HCSL,LVDS,LVHSTL,LVPECL,SSTL
輸出: HCSL,LVCMOS,LVTTL
電路數(shù): 1
比率 - 輸入:輸出: 1:9
差分 - 輸入:輸出: 是/是
頻率 - 最大: 600MHz
除法器/乘法器: 是/是
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 56-TFSOP(0.240",6.10mm 寬)
供應商設(shè)備封裝: 56-TSSOP
包裝: 管件
其它名稱: 800-1966-5
87159AGLF
ICS87159AGLF-ND
87159AG
www.idt.com
REV. B JULY 25, 2010
8
ICS87159
1-TO-8 LVPECL-TO-HCSL
÷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 output can be left floating. We
recommend that there is 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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