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 8 kHz to 1 GHz. 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-40G SyncE, respectively.

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


  • 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
  • 0.35ps 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
  • 8T49N241-998 “Boot from EEPROM”
  • 8T49N241-999 “powers up disabled”
  • Supported by Renesas Timing Commander Software™


PDF 1.49 MB Datasheet
PDF 187 KB Application Note
XLSX 551 KB Schematic
PDF 1.26 MB Product Change Notice
PDF 91 KB Application Note
PDF 348 KB Application Note
PDF 1.16 MB Application Note
PDF 734 KB Product Change Notice
PDF 157 KB Application Note
PDF 2.06 MB Manual - Hardware
PDF 1.99 MB Application Note
PDF 1.62 MB Overview
PDF 726 KB Product Change Notice
PDF 270 KB Manual - Hardware
PDF 983 KB Product Change Notice
PDF 454 KB Product Change Notice
PDF 21 KB Product Change Notice
PDF 686 KB Application Brief
PDF 604 KB Application Note
PDF 593 KB Application Note
PDF 175 KB Application Note
PDF 583 KB Product Change Notice
PDF 227 KB Product Change Notice
PDF 322 KB Application Note
PDF 256 KB Technical Brief
PDF 238 KB Technical Brief
PDF 188 KB Product Change Notice
PDF 566 KB Technical Brief
PDF 370 KB Product Brief
PDF 571 KB 日本語 Product Brief
PDF 198 KB Application Note
ZIP 1.04 MB Other
PDF 74 KB Schematic
PDF 1.11 MB Application Note
PDF 395 KB Application Note
PDF 170 KB Application Note
PDF 133 KB Application Note
PDF 495 KB Application Note
PDF 442 KB Application Note
PDF 115 KB Application Note
PDF 233 KB Application Note
PDF 131 KB Application Note
PDF 180 KB Application Note
PDF 153 KB Application Note
PDF 160 KB Application Note
PDF 120 KB Application Note
PDF 143 KB Application Note
PDF 565 KB Application Note
PDF 136 KB Application Note
PDF 202 KB Application Note
PDF 438 KB Application Note
PDF 108 KB Application Note
52 items

Design & Development

Software & Tools

Software Downloads

Type Date
ZIP 18.02 MB Software & Tools - Other
ZIP 6.71 MB Software & Tools - Software
ZIP 12 KB PCB Design Files
3 items

Boards & Kits

Boards & Kits



Type Date
ZIP 331 KB Model - IBIS
1 item


8T49N241/2: Universal Frequency Translators with Jitter Attenuation