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| 型号： | ICS84320AYI-01LF |
| 厂商： | IDT, Integrated Device Technology Inc |
| 文件页数： | 2/20页 |
| 文件大小： | 0K |
| 描述： | IC FREQ SYNTHESIZER 32TQFP |
| 标准包装： | 250 |
| 系列： | HiPerClockS™ |
| 类型： | 频率合成器 |
| PLL： | 带旁路 |
| 输入： | 晶体 |
| 输出： | LVPECL |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:2 |
| 差分 - 输入:输出： | 无/是 |
| 频率 - 最大： | 780MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3.135 V ~ 3.465 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-LQFP |
| 供应商设备封装： | 32-TQFP（7x7） |
| 包装： | 托盘 |
84320AYI-01
www.idt.com
REV. B AUGUST 4, 2010
10
ICS84320I-01
780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL
LVPECL FREQUENCY SYNTHESIZER
APPLICATION INFORMATION
As in any high speed analog circuitry, the power supply pins
are vulnerable to random noise. The ICS84320I-01 provides
separate power supplies to isolate any high switching
noise from the outputs to the internal PLL. V
CC, VCCA, and VCCO
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
INPUTS:
CRYSTAL INPUT
For applications not requiring the use of the crystal oscillator
input, both XTAL_IN and XTAL_OUT can be left floating.
Though not required, but for additional protection, a 1k
Ω
resistor can be tied from XTAL_IN to ground.
TEST_CLK INPUT
For applications not requiring the use of the test clock, it can
be left floating. Though not required, but for additional
protection, a 1k
Ω resistor can be tied from the TEST_CLK to
ground.
SELECT PINS
All select pins have internal pull-ups and 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.
LVPECL OUTPUTS
All unused LVPECL 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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相关代理商/技术参数 |
参数描述 |
|---|---|
| ICS84320AYI-01LFT | 功能描述:IC FREQ SYNTHESIZER 32TQFP 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:27 系列:Precision Edge® 类型:频率合成器 PLL:是 输入:PECL，晶体 输出:PECL 电路数:1 比率 - 输入:输出:1:1 差分 - 输入:输出:无/是 频率 - 最大:800MHz 除法器/乘法器:是/无 电源电压:3.135 V ~ 5.25 V 工作温度:0°C ~ 85°C 安装类型:表面贴装 封装/外壳:28-SOIC（0.295"，7.50mm 宽） 供应商设备封装:28-SOIC 包装:管件 |
| ICS84320AYI-01T | 制造商:ICS 制造商全称:ICS 功能描述:780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL |
| ICS84320I-01 | 制造商:ICS 制造商全称:ICS 功能描述:780MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL |
| ICS84321 | 制造商:ICS 制造商全称:ICS 功能描述:260MHZ, CRYSTAL-TO-3.3V DIFFERENTIAL LVPECL FREQUENCY SYNTHESIZER |
| ICS8432-101 | 制造商:ICS 制造商全称:ICS 功能描述:700MHZ, DIFFERENTIAL-TO-3.3V LVPECL FREQUENCY SYNTHESIZER |
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