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产品信息特性
DESCRIPTIONThe CDCE937 and CDCEL937 are modular PLL-based low cost, high-performance, programmable clock synthesizers, multipliers and dividers. They generate up to 7 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 three independent configurable PLLs. The CDCx937 has separate output supply pins, VDDOUT, which is 1.8 V for CDCEL937 and to 2.5 V to 3.3 V for CDCE937. 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 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 reference input frequency such as 27 MHz. All PLLs supports SSC (Spread-Spectrum Clocking). SSC can be Center-Spread or Down-Spread clocking which is a common technique to reduce electro-magnetic 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 non-volatile EEPROM programming for ease-customized application. It is preset to a factory default configuration (see the Default Device Configuration section). It can be reprogrammed to a different application configuration before PCB assembly, or reprogrammed by in-system programming. All device settings are programmable through SDA/SCL bus, a 2-wire serial interface. Three programmable control inputs, S0, S1 and S2, can be used to control various aspects of operation including frequency selection changing the SSC parameters to lower EMI, PLL bypass, power down, and choosing between low level or 3-state for output-disable function. The CDCx937 operates in 1.8 V environment. It is characterized for operation from -40° C to 85° C. |
| 价格(美元) | 封装 | CAD 设计工具 | 样片 | ||||||
| 器件 | 状态 | 温度 (oC) | 价格(美元) | Quantity | 封装 | 引脚 | 顶端标记 | 封装数量 | 封装载体 | 符号 | 尺寸 | 样片 |
| CDCE937PW | ACTIVE | -40 to 85 | 2.35 | 1ku | TSSOP (PW) | 20 | 查看 | 70 | TUBE | 请与TI分销商或销售办事处联系申请样片 | ||
| CDCE937PWG4 | ACTIVE | -40 to 85 | 2.35 | 1ku | TSSOP (PW) | 20 | 查看 | 70 | TUBE | 请与TI分销商或销售办事处联系申请样片 | ||
| CDCE937PWR | ACTIVE | -40 to 85 | 2.15 | 1ku | TSSOP (PW) | 20 | 查看 | 2000 | LARGE T&R | 采购样片 | ||
| CDCE937PWRG4 | ACTIVE | -40 to 85 | 2.15 | 1ku | TSSOP (PW) | 20 | 查看 | 2000 | LARGE T&R | 采购样片 | ||
建议零售价格仅用于预算,以美元为单位,并且价格是浮动的。 若要查询有关批量价格、本地货币价格或交付报价的信息,请与当地德州仪器 (TI) 销售办事处或授权经销商联系。
| TI 库存状态 | 已报告的分销商库存 | |||||||
| CDCE937PW | 截至 6:42 PM GMT, 2009年 7月 3日 | 截至 6:42 PM GMT, 2009年 7月 3日 | ||||||
| 交货周期 | 地区 | 公司 | 库存 | 采购 | ||||
| 16 Weeks | 中国 | WPI | 80 | |||||
| CDCE937PWG4 | 截至 6:42 PM GMT, 2009年 7月 3日 | 截至 6:42 PM GMT, 2009年 7月 3日 | ||||||
| 交货周期 | 地区 | 公司 | 库存 | 采购 | ||||
| 16 Weeks | 无报告 查看经销商 | |||||||
| CDCE937PWR | 截至 6:42 PM GMT, 2009年 7月 3日 | 截至 6:42 PM GMT, 2009年 7月 3日 | ||||||
| 交货周期 | 地区 | 公司 | 库存 | 采购 | ||||
| 4 Weeks | 无报告 查看经销商 | |||||||
| CDCE937PWRG4 | 截至 6:42 PM GMT, 2009年 7月 3日 | 截至 6:42 PM GMT, 2009年 7月 3日 | ||||||
| 交货周期 | 地区 | 公司 | 库存 | 采购 | ||||
| 4 Weeks | 无报告 查看经销商 | |||||||
| 查看中国经销商 | ||||||||
**目前尚无法提供交货时间信息。 但是,由于我们的信息每天都会更新,如有疑问,请马上与我们联系。 有关附加信息,请与首选的 TI 授权分销商 联系。
| 产品目录 | DPPM / MTBF / FIT 率 | ||||
| 器件 | 环保计划* | 铅/焊球涂层 | MSL 等级/回流焊峰 | 详细信息 | 详细信息 |
| CDCE937PW | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | 查看 | 查看 |
| CDCE937PWG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | 查看 | 查看 |
| CDCE937PWR | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | 查看 | 查看 |
| CDCE937PWRG4 | Green (RoHS & no Sb/Br) | CU NIPDAU | Level-1-260C-UNLIM | 查看 | 查看 |
* 计划的环保分级:无铅 (RoHS)、无铅(RoHS 豁免)或绿色环保(RoHS 和无 Sb/Br)- 请单击上表中产品目录明细的“查看”链接,以获得最新供货信息和附加产品目录明细。
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| 名称 | 型号 | 公司 | 工具/软件类型 |
| CDCE(L)949 系列 EEPROM 编程板 | CDCEL9XXPROGEVM | Texas Instruments | 开发电路板/EVM |
| ClockPro 程序设计软件 | CLOCKPRO | Texas Instruments | 应用软件 |