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Texas Instruments Texas Instruments CDCE(L)949 4-PLL VCXO 时钟合成器

Texas Instruments CDCE(L)949 4-PLL VCXO 时钟合成器是基于 PLL 的模数低成本、高性能、可编程时钟合成器、放大器和分配器。可通过一个输入频率生成多达 9 个输出时钟。可在系统中使用多达四个独立的可配置 PLL 为最大 230MHz 的任何时钟频率编程每个输出。CDCE(L)949 有单独的 2.5V - 3.3V 输出电源引脚 VDDOUT。输入接受外部晶体或 LVCMOS 时钟信号。如果使用外部晶体，则片载负载电容器可足够应付多数应用。负载电容器的可编程值为 0 - 20pF。另外，可以选择可同步输出频率与外部控制信号（即 PWM 信号）的片上 VCXO。

The CDCE(L)949 has separate output supply pins, VDDOUT, of 2.5V to 3.3V. 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 20pF. Additionally, an on-chip VCXO is selectable, allowing synchronization of the output frequency to an external control signal, that is, a PWM signal.

特性

  • Member of programmable clock generator family
    • CDCE913/CDCEL913: 1 PLLs, 3 outputs
    • CDCE925/CDCEL925: 2 PLLs, 5 outputs
    • CDCE937/CDCEL937: 3 PLLs, 7 outputs
    • CDCE949/CDCEL949: 4 PLLs, 9 outputs
  • In-system programmability and EEPROM
    • Serial programmable volatile register
    • Non-volatile EEPROM to store customer settings
  • Highly flexible clock driver
    • Three user-definable control inputs (S0/S1/S2) e.g. SSC-selection, frequency switching, output enable or power down
    • Generates highly-accurate clocks for video, audio, USB, IEEE1394, RFID, generates common clock frequencies used with TI DaVinci™, OMAP™, and DSPs
    • BlueTooth™, WLAN, Ethernet, and GPS
    • Programmable SSC modulation
    • Enables 0-PPM clock generation
  • Selectable output frequency up to 230MHz
  • Flexible input clocking concept
    • 8MHz to 32MHz external crystal
    • On-chip VCXO: pull-range ±150ppm
    • Single-ended LVCMOS up to 160MHz
  • Low-noise PLL core
    • Integrated PLL loop filter components
    • Very low period jitter (60ps typical)
  • Separate output supply pins
    • CDCE949: 3.3V and 2.5V
    • CDCEL949: 1.8V
  • 1.8V device power supply
  • Wide -40°C to +85°C temperature range
  • Packaged in TSSOP
  • Development and programming kit for easy PLL design and programming (TI-Pro clock)

应用

  • D-TV, HD-TV, STB, IP-STB, DVD-Player, DVD-Recorder, and Printer
  • General-purpose frequency synthesizing

Datasheets

Functional Block Diagram

框图 - Texas Instruments Texas Instruments CDCE(L)949 4-PLL VCXO 时钟合成器

Development Tools

Texas Instruments CDCE949PERF-EVM评估模块

验证VCXO 时钟合成器CDCE949的功能和性能。

Learn More关于Texas Instruments CDCE949PERF-EVM评估模块 View Products与Texas Instruments CDCE949PERF-EVM评估模块相关

Texas Instruments CDCEL9XXPROGEVM EEPROM Programming Board

Allows fast programming of prototyping samples or small production of the CDCE(L) family.

Learn More关于Texas Instruments CDCEL9XXPROGEVM EEPROM Programming Board View Products与Texas Instruments CDCEL9XXPROGEVM EEPROM Programming Board相关
发布日期: 2016-01-06 | 更新日期: 2022-03-11