CDCEL937 具有 1.8V LVCMOS 输出的可编程 3-PLL VCXO 时钟合成器 | 德州仪器 TI.com.cn

CDCEL937 (正在供货)

具有 1.8V LVCMOS 输出的可编程 3-PLL VCXO 时钟合成器

具有 1.8V LVCMOS 输出的可编程 3-PLL VCXO 时钟合成器 - CDCEL937
 

描述

The CDCE937 and CDCEL937 devices are modular PLL-based low cost, high-performance, programmable clock synthesizers, multipliers and dividers. They generate up to 7 output clocks from a single input frequency. Each output can be programmed in-system for any clock frequency up to 230 MHz, using up to three independent configurable PLLs.

The CDCEx937 has separate output supply pins, VDDOUT, which is 1.8 V for CDCEL937 and to 2.5 V to 3.3 V for CDCE937.

The input accepts an external crystal or LVCMOS clock signal. If an external crystal is used, an on-chip load capacitor is adequate for most applications. The value of the load capacitor is programmable from 0 to 20 pF. Additionally, an on-chip VCXO is selectable which allows synchronization of the output frequency to an external control signal, that is, PWM signal.

特性

  • Member of Programmable Clock Generator Family
    • CDCEx913: 1-PLL, 3 Outputs
    • CDCEx925: 2-PLL, 5 Outputs
    • CDCEx937: 3-PLL, 7 Outputs
    • CDCEx949: 4-PLL, 9 Outputs
  • In-System Programmability and EEPROM
    • Serial Programmable Volatile Register
    • Nonvolatile EEPROM to Store Customer Setting
  • Flexible Input Clocking Concept
    • External Crystal: 8 MHz to 32 MHz
    • On-Chip VCXO: Pull Range ±150 ppm
    • Single-Ended LVCMOS up to 160 MHz
  • Free Selectable Output Frequency up to 230 MHz
  • Low-Noise PLL Core
    • PLL Loop Filter Components Integrated
    • Low Period Jitter (Typical 60 ps)
  • Separate Output Supply Pins
    • CDCE937: 3.3 V and 2.5 V
    • CDCEL937: 1.8 V
  • Flexible Clock Driver
    • Three User-Definable Control Inputs [S0/S1/S2], for Example, SSC Selection, Frequency Switching, Output Enable or Power Down
    • Generates Highly Accurate Clocks for Video, Audio, USB, IEEE1394, RFID, Bluetooth™, WLAN, Ethernet™, and GPS
    • Generates Common Clock Frequencies Used With TI-DaVinci™, OMAP™, DSPs
    • Programmable SSC Modulation
    • Enables 0-PPM Clock Generation
  • 1.8-V Device Power Supply
  • Wide Temperature Range –40°C to 85°C
  • Packaged in TSSOP
  • Development and Programming Kit for Easy PLL Design and Programming (TI Pro-Clock™)
  • APPLICATIONS
    • D-TVs, STBs, IP-STBs, DVD Players, DVD Recorders, and Printers

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参数 与其它产品相比 扩频时钟

 
Input Level
Output Level
Features
Rating
Pin/Package
Operating Temperature Range (C)
Approx. Price (US$)
Divider Ratio
Function
Jitter-Peak to Peak(P-P) or Cycle to Cycle(C-C)
Number of Outputs
Output Frequency (Max) (MHz)
Output Frequency (Min) (MHz)
Output Skew (ps)
Programmability
CDCEL937 CDCE913 CDCE925 CDCE937 CDCE949 CDCEL824 CDCEL913 CDCEL925 CDCEL949
Crystal
LVCMOS    
Crystal
LVCMOS    
Crystal
LVCMOS    
Crystal
LVCMOS    
Crystal
LVCMOS    
Crystal
LVCMOS    
Crystal
LVCMOS    
Crystal
LVCMOS    
Crystal    
LVCMOS     LVCMOS     LVCMOS     LVCMOS     LVCMOS     LVCMOS     LVCMOS     LVCMOS     LVCMOS    
Integrated EEPROM
Multiplier/Divider
Spread Spectrum Clocking (SSC)    
I2C
Integrated EEPROM
Pin Programming
Spread Spectrum Clocking (SSC)    
Integrated EEPROM
Multiplier/Divider
Spread Spectrum Clocking (SSC)    
Integrated EEPROM
Multiplier/Divider
Spread Spectrum Clocking (SSC)    
Integrated EEPROM
Multiplier/Divider
Spread Spectrum Clocking (SSC)    
Integrated EEPROM
Spread Spectrum Clocking (SSC)    
Integrated EEPROM
Multiplier/Divider
Spread Spectrum Clocking (SSC)    
Integrated EEPROM
Multiplier/Divider
Spread Spectrum Clocking (SSC)    
Integrated EEPROM
Multiplier/Divider
Spread Spectrum Clocking (SSC)    
Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog     Catalog    
20TSSOP     14TSSOP     16TSSOP     20TSSOP     24TSSOP     16TSSOP     14TSSOP     16TSSOP     24TSSOP    
-40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85     -40 to 85    
2.14 | 1ku     1.60 | 1ku     1.93 | 1ku     2.14 | 1ku     2.35 | 1ku     1.75 | 1ku     1.60 | 1ku     1.80 | 1ku     2.35 | 1ku    
Universal     Universal     Universal     Universal     Universal       Universal     Universal     Universal    
Clock Synthesizer     Clock Generator
Spread Spectrum Clock    
Clock Synthesizer     Clock Synthesizer     Clock Synthesizer     Clock Generator     Clock Synthesizer     Clock Synthesizer     Clock Synthesizer    
60 ps     60 ps     60 ps     60 ps     60 ps     60 ps     60 ps     60 ps     60 ps    
7     3     5     7     9     4     3     5     9    
230     230     230     230     230     201     230     230     230    
8     8     8     8     8     8     8     8     8    
150     150     150     150     150     150     150     150     150    
EEPROM     EEPROM     EEPROM     EEPROM