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™




Type Title Date
Datasheet PDF 1.49 MB
Application Note PDF 187 KB
Schematic XLSX 551 KB
Product Change Notice PDF 1.26 MB
Application Note PDF 91 KB
Application Note PDF 348 KB
Application Note PDF 1.16 MB
Product Change Notice PDF 734 KB
Application Note PDF 157 KB
Manual - Hardware PDF 2.06 MB
Application Note PDF 1.99 MB
Overview PDF 1.62 MB
Product Change Notice PDF 726 KB
Manual - Hardware PDF 270 KB
Product Change Notice PDF 983 KB
Product Change Notice PDF 454 KB
Product Change Notice PDF 21 KB
Application Brief PDF 686 KB
Application Note PDF 604 KB
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Application Note PDF 175 KB
Product Change Notice PDF 583 KB
Product Change Notice PDF 227 KB
Application Note PDF 322 KB
Technical Brief PDF 256 KB
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Product Change Notice PDF 188 KB
Technical Brief PDF 566 KB
Product Brief PDF 370 KB
Product Brief PDF 571 KB 日本語
Application Note PDF 198 KB
Other ZIP 1.04 MB
Schematic PDF 74 KB
Application Note 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
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Application Note PDF 108 KB
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8T49N241/2: Universal Frequency Translators with Jitter Attenuation