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CDC421A250RGER PDF预览

CDC421A250RGER

更新时间： 2024-11-05 12:42:59
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德州仪器 - TI 时钟发生器
页数 文件大小 规格书
15页 619K
描述
Fully-Integrated, Fixed-Frequency, Low-Jitter Crystal Oscillator Clock Generator

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CDC421A250RGER 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：QFN
包装说明：HVQCCN, LCC24,.16SQ,20针数：24
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：12 weeks
风险等级：5.31JESD-30 代码：S-PQCC-N24
JESD-609代码：e4长度：4 mm
湿度敏感等级：2端子数量：24
最高工作温度：85 °C最低工作温度：-40 °C
最大输出时钟频率：250 MHz封装主体材料：PLASTIC/EPOXY
封装代码：HVQCCN封装等效代码：LCC24,.16SQ,20
封装形状：SQUARE封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260电源：3.3 V
主时钟/晶体标称频率：31.25 MHz认证状态：Not Qualified
座面最大高度：1 mm子类别：Clock Generators
最大压摆率：110 mA最大供电电压：3.6 V
最小供电电压：3 V标称供电电压：3.3 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：4 mmuPs/uCs/外围集成电路类型：CLOCK GENERATOR, OTHER
Base Number Matches：1

CDC421A250RGER 数据手册

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CDC421AXXX  
www.ti.com ....................................................................................................................................................................................................... SCAS875–MAY 2009  
Fully-Integrated, Fixed-Frequency, Low-Jitter  
Crystal Oscillator Clock Generator  
1
FEATURES  
APPLICATIONS  
•
Low-Cost, Low-Jitter Frequency Multiplier  
2
•
Single 3.3-V Supply  
•
High-Performance Clock Generator,  
Incorporating Crystal Oscillator Circuitry with  
Integrated Frequency Synthesizer  
DESCRIPTION  
The  
CDC421Axxx  
is  
a
high-performance,  
low-phase-noise clock generator. It has an integrated  
low-noise, LC-based voltage-controlled oscillator  
(VCO) that operates within the 1.75 GHz to 2.35 GHz  
frequency range. It has an integrated crystal oscillator  
that operates in conjunction with an external AT-cut  
crystal to produce a stable frequency reference for a  
•
•
Low Output Jitter: As low as 380 fs (RMS  
integrated between 10 kHz to 20 MHz)  
Low Phase Noise at 312.5 MHz:  
–
Less than –120 dBc/Hz at 10 kHz and  
–147 dBc/Hz at 10-MHz offset from carrier  
phase-locked  
synthesizer. The output frequency (fOUT  
proportional to the frequency of the input crystal  
(fXTAL).  
loop  
(PLL)-based  
frequency  
is  
•
•
Supports Crystal or LVCMOS Input  
Frequencies at 31.25 MHz, 33.33 MHz, and  
35.42 MHz  
)
Output Frequencies: 100 MHz, 106.25 MHz,  
125 MHz, 156.25 MHz, 212.5 MHz, 250 MHz, and  
312.5 MHz  
The device operates in 3.3-V supply environment and  
is characterized for operation from –40°C to +85°C.  
The CDC421Axxx is available in a QFN-24 4-mm ×  
4-mm package.  
•
•
Differential Low-Voltage Positive Emitter  
Coupled Logic (LVPECL) Outputs  
The CDC421Axxx differs from the CDC421xxx in  
the following ways:  
Fully-Integrated Voltage-Controlled Oscillator  
(VCO): Runs from 1.75 GHz to 2.35 GHz  
•
Device Startup  
•
•
•
•
•
Typical Power Consumption: 300 mW  
Chip Enable Control Pin  
The CDC421Axxx has an improved startup circuit  
to enable correct operation for all power-supply  
ramp times.  
Available in 4-mm × 4-mm QFN-24 Package  
ESD Protection Exceeds 2 kV (HBM)  
Industrial Temperature Range: –40°C to +85°C  
Loop Filter  
Crystal  
Oscillator  
Input  
CLK  
External  
Crystal  
VCO  
Feedback  
Divider  
NCLK  
CDC421Axxx  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas  
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
2
All trademarks are the property of their respective owners.  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2009, Texas Instruments Incorporated  
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CDC421A250RGER 替代型号

型号 品牌 替代类型 描述 数据表
CDC421A250RGET TI

完全替代

 Fully-Integrated, Fixed-Frequency, Low-Jitter Crystal Oscillator Clock Generator

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