CDCVF2505
- Phase-Lock Loop Clock Driver for Synchronous DRAM and General-Purpose Applications
- Spread Spectrum Clock Compatible
- Operating Frequency: 24 MHz to 200 MHz
- Low Jitter (Cycle-to-Cycle): < |150 ps| (Over 66 MHz to 200 MHz Range)
- Distributes One Clock Input to One Bank of Five Outputs (CLKOUT Used to Tune the Input-Output Delay)
- Three-States Outputs When There Is No Input Clock
- Operates From Single 3.3-V Supply
- Available in 8-Pin TSSOP and 8-Pin SOIC Packages
- Consumes Less Than 100 mA (Typical) in Power-Down Mode
- Internal Feedback Loop Is Used to Synchronize the Outputs to the Input Clock
- 25-Ω On-Chip Series Damping Resistors
- Integrated RC PLL Loop Filter Eliminates the Need for External Components
The CDCVF2505 is a high-performance, low-skew, low-jitter, phase-lock loop (PLL) clock driver. This device uses a PLL to precisely align the output clocks (1Y[0-3] and CLKOUT) to the input clock signal (CLKIN) in both frequency and phase. The CDCVF2505 operates at 3.3 V and also provides integrated series-damping resistors that make it ideal for driving point-to-point loads.
One bank of five outputs provides low-skew, low-jitter copies of CLKIN. Output duty cycles are adjusted to 50 percent, independent of duty cycle at CLKIN. The device automatically goes into power-down mode when no input signal is applied to CLKIN.
The loop filter for the PLLs is included on-chip. This minimizes the component count, space, and cost.
The CDCVF2505 is characterized for operation from –40°C to 85°C.
Because it is based on the PLL circuitry, the CDCVF2505 requires a stabilization time to achieve phase lock of the feedback signal to the reference signal. This stabilization is required following power up and application of a fixed-frequency, fixed-phase signal at CLKIN, and following any changes to the PLL reference.
技術資料
| 上位の文書 | タイプ | タイトル | フォーマットオプション | 最新の英語版をダウンロード | 日付 | |
|---|---|---|---|---|---|---|
| * | データシート | CDCVF2505 3.3-V Clock Phase-Lock Loop Clock Driver データシート (Rev. G) | PDF | HTML | 2016/08/31 | ||
| アプリケーション・ノート | Design and Layout Guidelines for the CDCVF2505 Clock Driver (Rev. A) | 2005/03/07 |
設計と開発
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| パッケージ | ピン数 | CAD シンボル、フットプリント、および 3D モデル |
|---|---|---|
| TSSOP (PW) | 8 | Ultra Librarian |
| SOIC (D) | 8 | Ultra Librarian |
購入と品質
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