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概览

描述

The 8T49N241 has one fractional-feedback PLL that can be used as a frequency translator with jitter attenuation or a frequency synthesizer. It is equipped with one integer and three fractional output dividers, allowing the generation of up to four different and unrelated output frequencies, ranging from 8kHz to 1GHz. Output frequencies can be completely independent of the input frequencies, and all four of these frequencies can be completely independent of each other. The four outputs may select among LVPECL, LVDS, HCSL, or LVCMOS output levels.

The 8T49N241 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 8T49N241 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 8T49N242 (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 to 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) and ITU-T G.813/G.8262 (SDH/SONET and 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 8kHz up to 1.0GHz (diff), 8kHz to 250MHz (LVCMOS), that meet jitter limits for 10G up to 25G Ethernet applications
  • 0.35ps RMS (including spurs), 12kHz to 20MHz
  • Accepts up to two LVPECL, LVDS, LVHSTL, HCSL, or LVCMOS input clocks ranging from 8kHz up to 875MHz
  • 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 10MHz to 50MHz
  • Register programmable through I²C or via external I²C EEPROM
  • 8T49N241-998 "Boot from EEPROM"
  • 8T49N241-999 "powers up disabled"
  • Supported by Renesas' Timing Commander™ software

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支持社区

  1. 使用Timing Commander软件提示无法找到8T49N241芯片

    购买的DP板上使用了8T49N241芯片提供时钟,下载了1.18.2版本的Timing Commander软件,使用C232HM-DDHSL-0和FT2232两种USB转I2C模块,都提示无法connect到 ...

    2025年6月11日

视频和培训

This video provides an overview of the 8T49N241/2, a universal frequency translator designed for jitter attenuation. The video highlights the product's key features and capabilities.