Function Clock synthesizer Number of outputs 5 Output frequency (Max) (MHz) 230 VCC core (V) 1.8 VCC out (V) 1.8 Input type XTAL, LVCMOS Output type LVCMOS Operating temperature range (C) -40 to 85 Features Integrated EEPROM, Multiplier or divider, Spread-spectrum clocking (SSC) Rating Catalog open-in-new 查找其它 时钟发生器


TSSOP (PW) 16 22 mm² 4.4 x 5 open-in-new 查找其它 时钟发生器


  • Member of Programmable Clock Generator Family
    • CDCEx913: 1-PLL, 3 Outputs
    • CDCEx925: 2-PLL, 5 Outputs
    • CDCEx925: 3-PLL, 7 Outputs
    • CDCEx949: 4-PLL, 9 Outputs
  • In-System Programmability and EEPROM
    • Serial Programmable Volatile Register
    • Nonvolatile EEPROM to Store Customer Settings
  • 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
    • CDCE925: 3.3 V and 2.5 V
    • CDCEL925: 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™)
    • D-TVs, STBs, IP-STBs, DVD Players, DVD Recorders, and Printers

All other trademarks are the property of their respective owners

open-in-new 查找其它 时钟发生器


The CDCE925 and CDCEL925 are modular PLL-based low-cost, high-performance, programmable clock synthesizers, multipliers, and dividers. They generate up to five 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 two independent configurable PLLs.

The CDCEx925 has a separate output supply pin, VDDOUT, which is 1.8 V for CDCEL925 and 2.5 V to 3.3 V for CDCE925.

The input accepts an external crystal or LVCMOS clock signal. In case of a crystal input, 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.

The deep M/N divider ratio allows the generation of zero-ppm audio/video, networking (WLAN, Bluetooth, Ethernet, GPS), or interface (USB, IEEE1394, memory stick) clocks from a 27-MHz reference input frequency, for example.

All PLLs support SSC (spread-spectrum clocking). SSC can be center-spread or down-spread clocking, which is a common technique to reduce electromagnetic interference (EMI).

Based on the PLL frequency and the divider settings, the internal loop filter components are automatically adjusted to achieve high stability and optimized jitter transfer characteristic of each PLL.

The device supports nonvolatile EEPROM programming for easy customization of the device in the application. It is preset to a factory default configuration and can be reprogrammed to a different application configuration before it goes onto the PCB or reprogrammed by in-system programming. All device settings are programmable through the SDA/SCL bus, a 2-wire serial interface.

Three, free programmable control inputs, S0, S1, and S2, can be used to select different frequencies, or change the SSC setting for lowering EMI, or other control features like outputs disable to low, outputs in high-impedance state, power down, PLL bypass, and so forth.

The CDCx925 operates in a 1.8-V environment and in a temperature range of –40°C to 85°C.

open-in-new 查找其它 时钟发生器


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类型 标题 下载最新的英文版本 发布
* 数据表 CDCE(L)925: Flexible Low Power LVCMOS Clock Generator With SSC Support for EMI Reduction 数据表 2016年 10月 27日
技术文章 How to select an optimal clocking solution for your FPGA-based design 2015年 12月 9日
技术文章 Clocking sampled systems to minimize jitter 2014年 7月 31日
技术文章 Timing is Everything: How to optimize clock distribution in PCIe applications 2014年 3月 28日
应用手册 VCXO Application Guideline for CDCE(L)9xx Family 2012年 4月 23日
用户指南 CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual 2010年 11月 22日
用户指南 CDCE(L)9xx Performance Evaluation Module 2010年 7月 7日
应用手册 Troubleshooting I2C 2009年 10月 19日
应用手册 Usage of I2C for CDCE(L)949, CDCE(L)937, CDCE(L)925, CDCE(L)913 2009年 9月 23日
用户指南 CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual 2008年 12月 9日
应用手册 Generating Low Phase-Noise Clocks for Audio Data Converters from Low Frequency 2008年 3月 31日
应用手册 Practical consideration on choosing a crystal for CDCE(L)9xx family 2008年 3月 24日
应用手册 Clocking Recommendations for DM6446 Digital Video EVM with Sngle PLL 2007年 8月 8日




评估板 下载
CDCE925 性能评估模块

The CDCE925Perf-Evaluation Module allows the verification of the functionality and performance of CDCE925 and CDCEL925 with the options of crystal and 1.8 V LVCMOS inputs. The outputs can be connected to the Oscilloscope directly with SMA cables.


  1. Easy-to-use evaluation module for fast prototyping and application evaluation
  2. Easy and fast device programming through TI Pro-Clock software
  3. Evaluation of multiple crystals and reference clocks due to flexible input structure
  4. EVM completely USB powered in factory default
  5. Option for USB power and (...)

评估板 下载
CDCEL925 性能评估模块

有了固定选项的晶振和 1.8V LVCMOS 输入,CDCEl925PERF 评估模块将有助于验证 CDCEL925 的功能和性能。输出可以通过 SMA 电缆直接连接到示波器。附带下列信息/项目:EVM 用户指南:SCAU022;程序设计软件时钟专业版:SCAC073.zip;CDCE(L)925 数据表:SCAS847

  • 易于使用的评估模块,可用于快速原型设计和应用评估。
  • 支持整个时钟系列。
  • 通过 TI Pro-ClockT 软件即可快速轻松地进行器件编程。
  • 凭借其灵活的输入结构,能评估多个晶体和基准时钟。
  • 出厂默认为 EVM 完全由 USB 供电。可任选 USB 电源和外部电源。
评估板 下载

CDCE(L)949 系列时钟发生器集成了 EEPROM,允许在启动后保存默认频率设置。CDCEL9XXPROGEVM 是允许对原型样片或小批量生产进行快速编程的编程板。它适用于该系列的全部 8 款器件:CDCE949、CDCE937、CDCE925、CDCE913、CDCEL949、CDCEL937、CDCEL925 和 CDCEL913,并且带有易于使用的通用插座。

此外还提供另一个用于性能测试和评估的 EVM,其器件型号为 CDCE(L)9xxPERF-EVM,此性能评估模块适用于每个单独器件。

评估板 下载
J6Entry、RSP 和 TDA2E-17 CPU 板 EVM 是一种评估平台,用于加快信息娱乐系统、可重新配置的数字群集或集成数字化驾驶舱以及 ADAS 应用的开发速度,并缩短其上市时间。CPU 板集成了并行摄像头接口、CAN、千兆位以太网、FPD-Link、USB3.0 和 HDMI 等主要外设。
  • 2GB DDR3L
  • LP8733/LP8732 电源解决方案
  • 板载 eMMC、NAND、NOR
  • USB3、USB2、PCIe、以太网、COM8Q、CAN、MLB、MicroSD 和 HDMI 连接器
评估板 下载

J6Entry/RSP EVM 是一种评估平台,用于加快信息娱乐系统、可重新配置的数字群集或集成数字化驾驶舱等应用的开发速度,并缩短其上市时间。

主 CPU 板集成了以太网或 HDMI 等主要外设,而信息娱乐应用子板 (JAMR3) 和 LCD/TS 子板将补充 CPU 板,从而提供完整的系统以快速开始评估和应用开发。

  • 具有电容式触控功能的 10.1" 显示
  • JAMR3 无线电调谐器应用板
  • 2GB DDR3L
  • LP8733/LP8732 电源解决方案
  • 板载 eMMC、NAND、NOR
  • USB3、USB2、PCIe、以太网、COM8Q、CAN、MLB、MicroSD 和 HDMI 连接器


驱动程序和库 下载
SCAC131.ZIP (77 KB)
编程工具 下载
ClockPro™ 程序设计软件
CLOCKPRO TI's ClockPro software allows users to program/configure the following devices in a friendly GUI interface:
  • CDCE949
  • CDCE937
  • CDCE925
  • CDCE913
  • CDCE906
  • CDCE706
  • CDCEL949
  • CDCEL937
  • CDCEL925
  • CDCEL913

It is intended to be used with the evaluation modules of the above devices.

  • Easy and fast device programming through EEPROM, I2C
  • Based on Labview
支持软件 下载
SCAC119E.ZIP (4405 KB)


封装 引脚 下载
TSSOP (PW) 16 了解详情



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