概览

简介

The 8T49N242 has one fractional-feedback PLL that can be used as a frequency translator with jitter attenuation or a frequency synthesizer. It is equipped with four integer output dividers, allowing the generation of up to four different output frequencies, ranging from 8 kHz to 1 GHz. Output frequencies can be completely independent of the input frequencies. The four outputs may select among LVPECL, LVDS, HCSL or LVCMOS output levels.

The 8T49N242 is ideal for use in a wide range of equipment, including 10G/40G/100G SONET/SDH and Ethernet network line cards, wireless base station baseband units, broadcast video. carrier Ethernet switches, OTN, or in test and measurement applications. For example, the 8T49N242 can be used in GbE/10GbE/100GbE Synchronous Ethernet line card applications in order to preserve the G.8262 compliance from the Synchronous Equipment Timing Source (SETS) on the timing card.

Renesas’ third generation Universal Frequency Translator family also includes the 8T49N241 (2-in / 1-PLL / 4-out), the 8T49N285 (2-in / 1-PLL / 8-out), the 8T49N286 (4-in / 2-PLL / 8-out) and the 8T49N287 (2-in / 2-PLL / 8-out). These devices are complemented by the 82P33714 and 82P33731 synchronous equipment timing source (SETS) for Synchronous Ethernet (SyncE) and 10G-40G SyncE, respectively.

To see other devices in this product family, visit the Universal Frequency Translators page.

特性

  • Compliant with the requirements outlined in Telcordia GR-253-CORE (SONET) & ITU-T G.813/G.8262 (SDH/SONET & SyncE) when paired with a Synchronous Equipment Timing Source (SETS ) device
  • Generates up to 4 LVPECL / LVDS/HCSL or 16 LVCMOS output clocks ranging from 8 kHz up to 1.0 GHz (diff), 8 kHz to 250 MHz (LVCMOS), that meet jitter limits for 10G up to 25G Ethernet applications
  • 0.276ps RMS (including spurs), 12 kHz to 20 MHz
  • Accepts up to two LVPECL, LVDS, LVHSTL, HCSL or LVCMOS input clocks ranging from 8 kHz up to 875 MHz
  • Auto and manual input clock selection with hitless switching
  • Clock input monitoring, including support for gapped clocks
  • Phase-Slope Limiting and Fully Hitless Switching options to control output phase transients
  • Operates from a 10 MHz to 50 MHz
  • Register programmable through I2C or via external I2C EEPROM
  • 8T49N242-998 “Boot from EEPROM”
  • 8T49N242-999 “powers up disabled”
  • Supported by Renesas Timing Commander Software

产品对比

应用

文档

设计和开发

软件与工具

软件与工具

Software title
Software type
公司
Timing Commander
Timing Commander™ 是一个基于 Windows™ 的创新软件平台,通过这个平台,系统设计工程师可以通过直观且灵活的图形用户界面 (GUI) 对精密的计时设备进行配置、编程和监控。
Code Generator 瑞萨电子
1 item

软件下载

类型 文档标题 日期
软件和工具 - 软件 登录后下载 ZIP 18.02 MB
软件和工具 - 软件 登录后下载 ZIP 6.71 MB
PCB设计文档 ZIP 12 KB
3 items

开发板与套件

开发板与套件

模型