產品詳細資料

Function Clock generator Number of outputs 1 Output frequency (max) (MHz) 1100 Core supply voltage (V) 3.3 Output supply voltage (V) 3.3 Input type LVCMOS Output type LVDS Operating temperature range (°C) -40 to 85 Features Design tool available, Integrated EEPROM, Serial interface Rating Catalog
Function Clock generator Number of outputs 1 Output frequency (max) (MHz) 1100 Core supply voltage (V) 3.3 Output supply voltage (V) 3.3 Input type LVCMOS Output type LVDS Operating temperature range (°C) -40 to 85 Features Design tool available, Integrated EEPROM, Serial interface Rating Catalog
VQFN (RGE) 24 16 mm² 4 x 4 WAFERSALE (YS) See data sheet
  • Single Supply at 3.3 V for LVPECL or LVDS Operation
  • High-Performance Clock Multiplier, Incorporating Crystal Oscillator Circuitry with Integrated Frequency Synthesizer
  • Low Output Jitter: 380 fs RMS typical (from 10 kHz to 20 MHz)
  • Low Phase Noise at High Frequency (708-MHz LVPECL):
    • Typically -109 dBc/Hz at 10 kHz and -146dBc/Hz at 10 MHz from the carrier
  • Supports Crystal or LVCMOS Input Frequencies from 27.35 MHz to 38.33 MHz
  • Output Frequency Ranges from 10.9 MHz to 766.7 MHz and from 875.2 MHz to 1175 MHz
  • Low-Voltage Differential Signaling (LVDS) Output, 100- Differential Off-Chip Termination, 10.9-MHz to 400-MHz Frequency Range
  • Differential Low-Voltage Positive Emitter Coupled Logic (LVPECL) Outputs, 10.9-MHz to 1.175-GHz Frequency Range
  • Two Fully-Integrated Voltage-Controlled Oscillators (VCO) Support Wide Output Frequency Range
  • Fully Integrated Programmable Loop Filter
  • Typical Power Consumption at 3.3 V:
    • 274 mW in LVDS mode
    • 250 mW in LVPECL mode
  • Chip Enable Control Pin
  • Simple Serial Interface Allows Programming after Manufacturing
  • Integrated On-Chip Nonvolatile Memory (EEPROM) Stores Settings Without Applying High Voltage
  • Available in 4-mm × 4-mm QFN-24 Package
  • ESD Protection Exceeds 2 kV (HBM)
  • Industrial Temperature Range: -40°C to +85°C
  • APPLICATIONS
    • Low-Cost, High-Frequency Crystal Oscillator

All trademarks are the property of their respective owners.

  • Single Supply at 3.3 V for LVPECL or LVDS Operation
  • High-Performance Clock Multiplier, Incorporating Crystal Oscillator Circuitry with Integrated Frequency Synthesizer
  • Low Output Jitter: 380 fs RMS typical (from 10 kHz to 20 MHz)
  • Low Phase Noise at High Frequency (708-MHz LVPECL):
    • Typically -109 dBc/Hz at 10 kHz and -146dBc/Hz at 10 MHz from the carrier
  • Supports Crystal or LVCMOS Input Frequencies from 27.35 MHz to 38.33 MHz
  • Output Frequency Ranges from 10.9 MHz to 766.7 MHz and from 875.2 MHz to 1175 MHz
  • Low-Voltage Differential Signaling (LVDS) Output, 100- Differential Off-Chip Termination, 10.9-MHz to 400-MHz Frequency Range
  • Differential Low-Voltage Positive Emitter Coupled Logic (LVPECL) Outputs, 10.9-MHz to 1.175-GHz Frequency Range
  • Two Fully-Integrated Voltage-Controlled Oscillators (VCO) Support Wide Output Frequency Range
  • Fully Integrated Programmable Loop Filter
  • Typical Power Consumption at 3.3 V:
    • 274 mW in LVDS mode
    • 250 mW in LVPECL mode
  • Chip Enable Control Pin
  • Simple Serial Interface Allows Programming after Manufacturing
  • Integrated On-Chip Nonvolatile Memory (EEPROM) Stores Settings Without Applying High Voltage
  • Available in 4-mm × 4-mm QFN-24 Package
  • ESD Protection Exceeds 2 kV (HBM)
  • Industrial Temperature Range: -40°C to +85°C
  • APPLICATIONS
    • Low-Cost, High-Frequency Crystal Oscillator

All trademarks are the property of their respective owners.

The CDCE421A is a high-performance, low phase noise clock generator. It has two fully-integrated, low-noise, LC-based voltage-controlled oscillators (VCOs) that operate in the 1.750-GHz to 2.350-GHz frequency range. It also features an integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable frequency reference for the phase-locked loop (PLL) based frequency synthesizer.

The output frequency (fOUT) is proportional to the frequency of the input crystal (fXTAL). The prescaler divider, feedback divider, output divider, and VCO selection set the output frequency with respect to fXTAL.

In the CDCE421A, the feedback divider is set automatically with respect to the prescaler setting. The product of the prescaler and the feedback divider should be between 60 and 64 as shown in to maintain a stable control loop.

The CDCE421A supports one differential LVDS clock output or one differential LVPECL output. All device settings are programmable through a proprietary simple serial interface (SSI).

The device operates in 3.3-V supply environment for both LVPECL and LVDS outputs and is characterized for operation from -40°C to +85°C. The CDCE421A is available in a QFN-24 4-mm × 4-mm package.

CDCE421 Users:

The CDCE421A provides several device enhancements to the CDCE421.

The CDCE421A is a high-performance, low phase noise clock generator. It has two fully-integrated, low-noise, LC-based voltage-controlled oscillators (VCOs) that operate in the 1.750-GHz to 2.350-GHz frequency range. It also features an integrated crystal oscillator that operates in conjunction with an external AT-cut crystal to produce a stable frequency reference for the phase-locked loop (PLL) based frequency synthesizer.

The output frequency (fOUT) is proportional to the frequency of the input crystal (fXTAL). The prescaler divider, feedback divider, output divider, and VCO selection set the output frequency with respect to fXTAL.

In the CDCE421A, the feedback divider is set automatically with respect to the prescaler setting. The product of the prescaler and the feedback divider should be between 60 and 64 as shown in to maintain a stable control loop.

The CDCE421A supports one differential LVDS clock output or one differential LVPECL output. All device settings are programmable through a proprietary simple serial interface (SSI).

The device operates in 3.3-V supply environment for both LVPECL and LVDS outputs and is characterized for operation from -40°C to +85°C. The CDCE421A is available in a QFN-24 4-mm × 4-mm package.

CDCE421 Users:

The CDCE421A provides several device enhancements to the CDCE421.

下載 觀看有字幕稿的影片 影片

技術文件

star =TI 所選的此產品重要文件
找不到結果。請清除您的搜尋條件,然後再試一次。
檢視所有 2
類型 標題 日期
* Data sheet CDCE421A datasheet 2009年 4月 21日
EVM User's guide CDCE421AEVM User Guide 2009年 6月 2日

設計與開發

如需其他條款或必要資源,請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發模組 (EVM) 的 GUI

SCAC111 CDCE421A Control GUI v1.0

支援產品和硬體

支援產品和硬體

產品
時鐘產生器
CDCE421A 完全整合式寬範圍低抖動晶體振盪器時脈產生器
模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
封裝 針腳 CAD 符號、佔位空間與 3D 模型
VQFN (RGE) 24 Ultra Librarian
WAFERSALE (YS)

訂購與品質

內含資訊:
  • RoHS
  • REACH
  • 產品標記
  • 鉛塗層/球物料
  • MSL 等級/回焊峰值
  • MTBF/FIT 估算值
  • 材料內容
  • 認證摘要
  • 進行中持續性的可靠性監測
內含資訊:
  • 晶圓廠位置
  • 組裝地點

建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

內容係由 TI 和社群貢獻者依「現狀」提供,且不構成 TI 規範。檢視使用條款

若有關於品質、封裝或訂購 TI 產品的問題,請參閱 TI 支援。​​​​​​​​​​​​​​

影片