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CDCM61004_10 PDF预览

CDCM61004_10

更新时间: 2024-11-18 11:52:47
品牌 Logo 应用领域
德州仪器 - TI 时钟发生器
页数 文件大小 规格书
34页 789K
描述
Four Output, Integrated VCO, Low-jitter Clock Generator

CDCM61004_10 数据手册

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CDCM61004  
www.ti.com  
SCAS871D FEBRUARY 2009REVISED FEBRUARY 2010  
Four Output, Integrated VCO, Low-Jitter Clock Generator  
Check for Samples: CDCM61004  
1
FEATURES  
Low Output Skew of 30 ps on LVPECL Outputs  
Divider Programming Using Control Pins:  
2
One Crystal Reference Input Including 24.8832  
MHz, 25 MHz, and 26.5625 MHz  
Two Pins for Prescaler/Feedback Divider  
Three Pins for Output Divider  
Input Frequency Range: 21.875 MHz to  
28.47 MHz  
Two Pins for Output Select  
On-Chip VCO Operates in Frequency Range of  
1.75 GHz to 2.05 GHz  
Chip Enable Control Pin Available  
3.3-V Core and I/O Power Supply  
4x Output Available:  
Industrial Temperature Range: –40°C to +85°C  
5-mm × 5-mm, 32-pin, QFN (RHB) Package  
ESD Protection Exceeds 2 kV (HBM)  
Pin-Selectable Between LVPECL, LVDS, or  
2-LVCMOS; Operates at 3.3 V  
LVCMOS Bypass Output Available  
Output Frequency Selectable by /1, /2, /3, /4, /6,  
/8 from a Single Output Divider  
APPLICATIONS  
Low Jitter Clock Driver for High-End Datacom  
Applications Including SONET, Ethernet, Fibre  
Channel, Serial ATA, and HDTV  
Supports Common LVPECL/LVDS Output  
Frequencies:  
62.5 MHz, 74.25 MHz, 75 MHz, 77.76 MHz,  
100 MHz, 106.25 MHz, 125 MHz, 150 MHz,  
155.52 MHz, 156.25 MHz, 159.375 MHz,  
187.5 MHz, 200 MHz, 212.5 MHz, 250 MHz,  
311.04 MHz, 312.5 MHz, 622.08 MHz,  
625 MHz  
Cost-Effective High-Frequency Crystal  
Oscillator Replacement  
DESCRIPTION  
The CDCM61004 is a highly versatile, low-jitter  
frequency synthesizer that can generate four low-jitter  
clock outputs, selectable between low-voltage  
positive emitter coupled logic (LVPECL), low-voltage  
differential signaling (LVDS), or low-voltage  
Supports Common LVCMOS Output  
Frequencies:  
62.5 MHz, 74.25 MHz, 75 MHz, 77.76 MHz,  
100 MHz, 106.25 MHz, 125 MHz, 150 MHz,  
155.52 MHz, 156.25 MHz, 159.375 MHz,  
187.5 MHz, 200 MHz, 212.5 MHz, 250 MHz  
complementary  
metal  
oxide  
semiconductor  
(LVCMOS) outputs, from a low-frequency crystal for a  
variety of wireline and data communication  
applications. The CDCM61004 features an onboard  
PLL that can be easily configured solely through  
control pins. The overall output random jitter  
performance is less than 1ps, RMS (from 10 kHz to  
20 MHz), making this device a perfect choice for use  
in demanding applications such as SONET, Ethernet,  
Fibre Channel, and SAN. The CDCM61004 is  
available in a small, 32-pin, 5-mm × 5-mm QFN  
package.  
Output Frequency Range: 43.75 MHz to  
683.264 MHz (See Table 3)  
Internal PLL Loop Bandwidth: 400 kHz  
High-Performance PLL Core:  
Phase Noise typically at –146 dBc/Hz at  
5-MHz Offset for 625-MHz LVPECL Output  
Random Jitter typically at 0.509 ps, RMS  
(10 kHz to 20 MHz) for 625-MHz LVPECL  
Output  
Output Duty Cycle Corrected to 50% (± 5%)  
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 © 2009–2010, Texas Instruments Incorporated  
 

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