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參數(shù)資料
| 型號： | ICS525RI-11LF |
| 廠商： | IDT, Integrated Device Technology Inc |
| 文件頁數(shù)： | 6/10頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC PECL CLK USER CONFIG 28-SSOP |
| 標準包裝： | 48 |
| 類型： | 時鐘發(fā)生器，扇出配送 |
| PLL： | 帶旁路 |
| 輸入： | 時鐘，晶體 |
| 輸出： | CMOS |
| 電路數(shù)： | 1 |
| 比率 - 輸入:輸出： | 2:2 |
| 差分 - 輸入:輸出： | 無/無 |
| 頻率 - 最大： | 35MHz |
| 除法器/乘法器： | 是/無 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 28-QSOP |
| 包裝： | 管件 |
| 其它名稱： | 525RI-11LF |
ICS525-01/02/11/12
USER CONFIGURABLE CLOCK
CLOCK MULTIPLIER
IDT USER CONFIGURABLE CLOCK
5
ICS525-01/02/11/12 REV T 053012
External Components/Crystal
Selection
Decoupling Capacitors
The ICS525-01/02/11/12 requries two 0.01F
decoupling capacitors to be connected between VDD
and GND, one on each side of the chip. The capacitor
must be connected close to the device to minimize lead
inductance.
External Resistors
A 33
Ω series termination resistor should be used on the
CLK and REF pins.
Crystal Load Capacitors
The approximate total on-chip capacitance for a crystal
is 16 pF, so a parallel resonant, fundamental mode
crystal with this value of load (correlation) capacitance
should be used. For crystals with a specified load
capacitance greater than 16 pF, crystal capacitors may
be connected from each of the pins X1 and X2 to
Ground as shown in the block diagram. The value (in
pF) of these crystal caps should be (CL -16)*2, where
CL is the crystal load capacitance in pF. These external
capacitors are only required for applications where the
exact frequency is critical. For a clock input, connect to
X1 and leave X2 unconnected (no capacitors on either).
Determining the Output Frequency
Users have full control in setting the desired output
frequency over the range shown in the tables on pages
3-4. To replace a standard oscillator, users 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.
The ICS525 will automatically produce the correct
frequency when all components are soldered. It is also
possible to connect the inputs to parallel I/O ports to
switch frequencies. By choosing divides carefully, the
number of inputs which need to be changed can be
minimized. Observe the restrictions on allowed values
of VDW and RDW.
Configuration Pin Settings
The output of the ICS525 can be determined by the
following simple equation:
Where:
Reference Divider Word (RDW) = 0 to 127 (0 not
permitted for ICS525-01/-11)
VCO Divider Word (VDW) = 0 to 511 (0, 1, 2, 3 not
permitted for ICS525-01/-11)
Output Divider (OD) = values on pages 3-4
Also, the following operating ranges should be
observed:
1. The output frequency must be in the ranges listed on
pages 3-4.
2. The phase detector frequency must be above 200
kHz.
Since all of the inputs have pull-up resistors, it is only
necessary to ground the pins that need to be set to zero.
Which Part to Use?
The ICS525-01 is the original configurable clock.
The ICS525-02 has a higher maximum output
grequency and a slightly different set of output dividers.
The ICS525-11 has the same divider set as the -01 but
is optimized for low frequency operation.
The ICS525-12 has the same divider set as the -02 but
is optimized for low frequency operation.
To determine the best combination of VCO, reference,
and output divide, use the ICS525 Calculator on our
web site.
CLK Frequency
Input Frequency
2x
VDW
8
+
()
RDW
2
+
() OD
---------------------------------------------
×
=
200kHz
InputFrequency
RDW
2
+
()
-----------------------------------------------
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ICS525RI-11LFT | 功能描述:IC PECL CLK USER CONFIG 28-SSOP RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 時鐘發(fā)生器 PLL:帶旁路 輸入:LVCMOS，LVPECL 輸出:LVCMOS 電路數(shù):1 比率 - 輸入:輸出:2:11 差分 - 輸入:輸出:是/無 頻率 - 最大:240MHz 除法器/乘法器:是/無 電源電壓:3.135 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:32-LQFP 供應商設備封裝:32-TQFP（7x7） 包裝:帶卷 (TR) |
| ICS525RI-11T | 功能描述:IC PECL CLK USER CONFIG 28-SSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:- 產(chǎn)品變化通告:Product Discontinuation 04/May/2011 標準包裝:96 系列:- 類型:時鐘倍頻器，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/無 頻率 - 最大:133.3MHz 除法器/乘法器:是/無 電源電壓:3 V ~ 3.6 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:16-TSSOP 包裝:管件 其它名稱:23S08-5HPGG |
| ICS525RI-12 | 制造商:ICS 制造商全稱:ICS 功能描述:User Configurable Clock |
| ICS525RI-12LF | 制造商:ICS 制造商全稱:ICS 功能描述:User Configurable Clock |
| ICS525RI12LFT | 制造商:ICS 制造商全稱:ICS 功能描述:User Configurable Clock |
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