- 您现在的位置：买卖IC网 > PDF目录67690 > ICS84320AK-01T 780 MHz, OTHER CLOCK GENERATOR, QCC32 PDF资料下载
参数资料
| 型号： | ICS84320AK-01T |
| 元件分类： | 时钟产生/分配 |
| 英文描述： | 780 MHz, OTHER CLOCK GENERATOR, QCC32 |
| 封装： | 5 X 5 MM, 0.95 MM HEIGHT, MO-220, VFQFN-32 |
| 文件页数： | 2/20页 |
| 文件大小： | 375K |
| 代理商： | ICS84320AK-01T |
84320AY-01
www.icst.com/products/hiperclocks.html
REV. B APRIL 14, 2006
10
Integrated
Circuit
Systems, Inc.
ICS84320-01
780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
CRYSTAL INPUT INTERFACE
A crystal can be characterized for either series or parallel mode
operation.The ICS84320-01 has a built-in crystal oscillator circuit.
This interface can accept either a series or parallel crystal without
additional components and generate frequencies with accuracy
Figure 3. CRYSTAL INPUt INTERFACE
suitable for most applications. Additional accuracy can be
achieved by adding two small capacitors C1 and C2 as shown in
Figure 3.
C2
22p
C1
18p
X1
18pF Parallel Crystal
ICS84320-01
25
24
XTAL1
XTAL2
LVCMOS TO XTAL INTERFACE
The XTAL_IN input can accept a single-ended LVCMOS signal
through an AC coupling capacitor. A general interface diagram
is shown in Figure 4. The XTAL_OUT pin can be left floating.
The input edge rate can be as slow as 10ns. For LVCMOS
inputs, it is recommended that the amplitude be reduced from
full swing to half swing in order to prevent signal interference
with the power rail and to reduce noise. This configuration
requires that the output impedance of the driver (Ro) plus the
FIGURE 4. GENERAL DIAGRAM FOR LVCMOS DRIVER TO XTAL INPUT INTERFACE
series resistance (Rs) equals the transmission line
impedance. In addition, matched termination at the crystal
input will attenuate the signal in half. This can be done in one
of two ways. First, R1 and R2 in parallel should equal the
transmission line impedance. For most 50
Ω applications, R1
and R2 can be 100
Ω. This can also be accomplished by
removing R1 and making R2 50
Ω.
R2
Zo = 50
VDD
Ro
Zo = Ro + Rs
R1
VDD
XTAL_IN
XTAL_OUT
.1uf
Rs
相关PDF资料 |
PDF描述 |
|---|---|
| ICS84320AY-01LN | 780 MHz, OTHER CLOCK GENERATOR, PQFP32 |
| ICS84321AYI | 260 MHz, OTHER CLOCK GENERATOR, PQFP32 |
| ICS84321AYIT | 260 MHz, OTHER CLOCK GENERATOR, PQFP32 |
| ICS84321AYLFT | 260 MHz, OTHER CLOCK GENERATOR, PQFP32 |
| ICS843246AMIT | 333.33 MHz, OTHER CLOCK GENERATOR, PDSO24 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS84320AY-01 | 制造商:ICS 制造商全称:ICS 功能描述:780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84320AY-01LN | 功能描述:IC SYNTHESIZER GP LVPECL 32-LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS84320AY-01LNT | 功能描述:IC SYNTHESIZER 780MHZ 32-LQFP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:HiPerClockS™ 标准包装:1,000 系列:- 类型:时钟/频率合成器，扇出分配 PLL:- 输入:- 输出:- 电路数:- 比率 - 输入:输出:- 差分 - 输入:输出:- 频率 - 最大:- 除法器/乘法器:- 电源电压:- 工作温度:- 安装类型:表面贴装 封装/外壳:56-VFQFN 裸露焊盘 供应商设备封装:56-VFQFP-EP（8x8） 包装:带卷 (TR) 其它名称:844S012AKI-01LFT |
| ICS84320AY-01T | 制造商:IDT 制造商全称:Integrated Device Technology 功能描述:780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS84320AYI-01 | 制造商:ICS 制造商全称:ICS 功能描述:780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL |
发布紧急采购，3分钟左右您将得到回复。