CDCE925
- 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™)
- APPLICATIONS
- D-TVs, STBs, IP-STBs, DVD Players, DVD Recorders, and Printers
All other trademarks are the property of their respective owners
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.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | CDCE(L)925: Flexible Low Power LVCMOS Clock Generator With SSC Support for EMI Reduction datasheet (Rev. I) | PDF | HTML | 2016年 10月 27日 |
Application note | VCXO Application Guideline for CDCE(L)9xx Family (Rev. A) | 2012年 4月 23日 | ||
User guide | CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual (Rev. A) | 2010年 11月 22日 | ||
User guide | CDCE(L)9xx Performance Evaluation Module (Rev. A) | 2010年 7月 7日 | ||
Application note | General I2C / EEPROM usage for the CDCE(L)9xx family | 2010年 1月 26日 | ||
Application note | Troubleshooting I2C Bus Protocol | 2009年 10月 19日 | ||
Application note | Usage of I2C for CDCE(L)949, CDCE(L)937, CDCE(L)925, CDCE(L)913 | 2009年 9月 23日 | ||
User guide | CDCE(L)9XX & CDCEx06 Programming Evaluation Module Manual | 2008年 12月 9日 | ||
Application note | Generating Low Phase-Noise Clocks for Audio Data Converters from Low Frequency | 2008年 3月 31日 | ||
Application note | Practical consideration on choosing a crystal for CDCE(L)9xx family | 2008年 3月 24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)。
CDCE925PERF-EVM — CDCE925 性能評估模組
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.
CDCEL9XXPROGEVM — CDCE(L)949 系列 EEPROM 程式設計基板
The clock generator CDCE(L)949 family has integrated EEPROM that allows the default frequency settings to be saved upon start up. CDCEL9XXPROGEVM is a programming board that allows a fast programming of prototyping samples or small production quantities. It applies to all 8 devices in the family: (...)
DP83822EVM — DP83822I 10 Mbps 和 100 Mbps 乙太網路 PHY 評估模組
DP83822EVM 支援 100BASE-FX、100BASE-TX 和 10BASE-Te。此設計已通過 UNH 測試和驗證,符合相關規範。其亦通過 A 類排放認證,額定值為 ±8-kV IEC61000-4-2 (觸點放電)。
DP83822EVM 包含兩個板載狀態 LED,以及一個具有板載 LDO 穩壓器的 5-V USB 連接器。此 EVM 可使用 USB-2 MDIO 工具進行 SMI 存取。4 級束帶讓您無須直接存取 PHY 暫存器即可配置系統。外部電源供應器可連接至各指定電壓軌,以進行額外系統評估。DP83822EVM 支援節能乙太網路、區域網路喚醒、訊框起始偵測 IEEE (...)
CDCE925SW-LINUX — 適用於 CDCE925 的 Linux 驅動程式
Linux Mainline Status
Available in Linux Main line: Yes
Available through git.ti.com: N/A
- cdce925
SCAC131 — Drivers for the CDCEL9xx programmer EVM
支援產品和硬體
產品
時鐘產生器
硬體開發
開發板
CLOCKPRO — ClockPro Software
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.
支援產品和硬體
產品
時鐘產生器
硬體開發
開發板
軟體
軟體程式設計工具
SCAC073 — TI-Pro-Clock Programming Software
支援產品和硬體
產品
時鐘產生器
CLOCK-TREE-ARCHITECT — 時鐘樹架構程式設計軟體
PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具
封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
---|---|---|
TSSOP (PW) | 16 | Ultra Librarian |
訂購與品質
- 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
- 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。