參數(shù)資料
型號(hào): ICS527R-03LFT
廠商: IDT, Integrated Device Technology Inc
文件頁(yè)數(shù): 3/9頁(yè)
文件大?。?/td> 0K
描述: IC CLK SLICER PECL ZDB 28-SSOP
產(chǎn)品培訓(xùn)模塊: Clock Distibution and Generation 1.0
產(chǎn)品變化通告: Product Discontinuation 09/Feb/2012
標(biāo)準(zhǔn)包裝: 2,500
類(lèi)型: 扇出緩沖器(分配),零延遲緩沖
PLL:
輸入: CMOS
輸出: PECL
電路數(shù): 1
比率 - 輸入:輸出: 1:2
差分 - 輸入:輸出: 無(wú)/無(wú)
頻率 - 最大: 160MHz
除法器/乘法器: 是/是
電源電壓: 3.15 V ~ 3.45 V
工作溫度: 0°C ~ 70°C
安裝類(lèi)型: 表面貼裝
封裝/外殼: 28-SSOP(0.154",3.90mm 寬)
供應(yīng)商設(shè)備封裝: 28-QSOP
包裝: 帶卷 (TR)
其它名稱(chēng): 527R-03LFT
ICS527-03
CLOCK SLICER USER CONFIGURABLE PECL OUTPUT ZDB
PECL ZDB AND MULTIPLIER/DIVIDER
IDT / ICS CLOCK SLICER USER CONFIGURABLE PECL OUTPUT ZDB 3
ICS527-03
REV E 051310
External Components
Decoupling Capacitors
As with any high performance mixed-signal IC, the
ICS527-03 must be isolated from system power supply
noise to perform optimally.
Decoupling capacitors of 0.01F must be connected
between each VDD and the PCB ground plane. They
must be connected close to the device to minimize lead
inductance.
Series Termination Resistor
Clock output traces over one inch should use series
termination. To series terminate a 50
commonly used trace impedance), place a 33
resistor
in series with the clock line, as close to the clock output
pin as possible. The nominal impedance of the clock
output is 20
.
Determining (setting) the ICS527-03
Dividers
The user has full control in setting the desired output
clock over the range shown in the table on page 2. The
user should connect the divider select input pins directly
to ground (or VDD, although this is not required
because of internal pull-ups) during Printed Circuit
Board layout, so the ICS527-03 automatically produces
the correct clock when all components are soldered. It
is also possible to connect the inputs to parallel I/O
ports in order to switch frequencies.
The output of the ICS527-03 can be determined by the
following simple equation:
Where:
Reference Divider Word (RDW) = 0 to 127
Feedback Divider Word (FDW) = 0 to 127
FB Frequency is the same as either CLK1 or
CLK2 depending on feedback connection
Also, the following operating ranges should be
observed:
The output divide should be selected depending on
the frequency of CLK1. The table on page 2 gives
the ranges.
The dividers are expressed as integers. For example, if
a 50 MHz output on CLK1 is desired from a 40 MHz
input, the reference divider word (RDW) should be 2
and the feedback divider word (FDW) should be 3 which
gives the required 5/4 multiplication. If multiple choices
of dividers are available, then the lowest numbers
should be used. In this example, the output divide (OD)
should be selected to be 2. Then R6:R0 is 0000010,
F6:F0 is 0000011 and S1:S0 is 00. Also, this example
assumes CLK1 is connected to FBIN.
settings, please send an e-mail to ics-mk@icst.com
with the desired input clock and the desired output
frequency.
FB Frequency
Input Frequency
FDW
2
+
RDW
2
+
------------------------
×
=
300kHz
Input Frequency
RDW
2
+
-------------------------------------------
20 MHz
<<
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ICS527R-04 功能描述:IC CLK SLICER PECL ZDB 28-SSOP RoHS:否 類(lèi)別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器,PLL,頻率合成器 系列:- 產(chǎn)品變化通告:Product Discontinuation 04/May/2011 標(biāo)準(zhǔn)包裝:96 系列:- 類(lèi)型:時(shí)鐘倍頻器,零延遲緩沖器 PLL:帶旁路 輸入:LVTTL 輸出:LVTTL 電路數(shù):1 比率 - 輸入:輸出:1:8 差分 - 輸入:輸出:無(wú)/無(wú) 頻率 - 最大:133.3MHz 除法器/乘法器:是/無(wú) 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:16-TSSOP(0.173",4.40mm 寬) 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:管件 其它名稱(chēng):23S08-5HPGG
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