參數(shù)資料
型號(hào)： ICS843034AY-01T
廠(chǎng)商： SPECTRUM CONTROL INC
元件分類(lèi)： 時(shí)鐘產(chǎn)生/分配
英文描述： 640 MHz, OTHER CLOCK GENERATOR, PQFP48
封裝： 7 X 7 MM, 1.40 MM HEIGHT, MS-026BBC, LQFP-48
文件頁(yè)數(shù)： 6/22頁(yè)
文件大?。?/td> 292K
代理商： ICS843034AY-01T
843034AY-01
www.icst.com/products/hiperclocks.html
REV. C NOVEMBER 28, 2005
14
Integrated
Circuit
Systems, Inc.
ICS843034-01
FEMTOCLOCKS
MULTI-RATE LVPECL FREQUENCY SYNTHESIZER
PRELIMINARY
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS843034-01 provides
separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
CC, VCCA, and VCCO_x
should be individually connected to the power supply
plane through vias, and bypass capacitors should be
used for each pin. To achieve optimum jitter performance,
power supply isolation is required. Figure 2 illustrates how
a 24
Ω resistor along with a 10μF and a .01μF bypass
capacitor should be connected to each V
CCA pin.
POWER SUPPLY FILTERING TECHNIQUES
FIGURE 2. POWER SUPPLY FILTERING
24
Ω
V
CCA
10
μF
.01
μF
3.3V
.01
μF
V
CC
APPLICATION INFORMATION
Figure 3 shows how the differential input can be wired to accept
single ended levels. The reference voltage V_REF = V
CC/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
WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LVCMOS/LVTTL 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
CC = 3.3V, V_REF should be 1.25V
and R2/R1 = 0.609.
V_REF
R1
1K
C1
0.1u
R2
1K
Single Ended Clock Input
CLK
nCLK
VCC
FIGURE 3. SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT
相關(guān)PDF資料
PDF描述
ICS843034AYT 750 MHz, OTHER CLOCK GENERATOR, PQFP48
ICS843034AYLF 750 MHz, OTHER CLOCK GENERATOR, PQFP48
ICS843081AGI-01T 700 MHz, OTHER CLOCK GENERATOR, PDSO8
ICS8430AY-51LF 600 MHz, OTHER CLOCK GENERATOR, PQFP32
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
ICS843034AYL 制造商:ICS 制造商全稱(chēng):ICS 功能描述:MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
ICS843034AYLF 功能描述:IC CLK SYNTHESIZER LVPECL 48LQFP RoHS:是 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:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類(lèi)型:頻率合成器 PLL:是 輸入:PECL，晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無(wú)/是 頻率 - 最大:800MHz 除法器/乘法器:是/無(wú) 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
ICS843034AYLFT 功能描述:IC CLK SYNTHESIZER LVPECL 48LQFP RoHS:是 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:HiPerClockS™, FemtoClock™ 標(biāo)準(zhǔn)包裝:27 系列:Precision Edge® 類(lèi)型:頻率合成器 PLL:是 輸入:PECL，晶體 輸出:PECL 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無(wú)/是 頻率 - 最大:800MHz 除法器/乘法器:是/無(wú) 電源電壓:3.135 V ~ 5.25 V 工作溫度:0°C ~ 85°C 安裝類(lèi)型:表面貼裝 封裝/外殼:28-SOIC（0.295"，7.50mm 寬） 供應(yīng)商設(shè)備封裝:28-SOIC 包裝:管件
ICS843034AYT 制造商:ICS 制造商全稱(chēng):ICS 功能描述:MULTI-RATE 3.3V, 2.5V LVPECL FREQUENCY SYNTHESIZER
ICS843051 制造商:ICS 制造商全稱(chēng):ICS 功能描述:FEMTOCLOCKS CRYSTAL-TO-3.3V LVPECL CLOCK GENERATOR
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