The 8T49N286 has one fractional-feedback PLL that can be used as a frequency translator with jitter attenuation or a frequency synthesizer. It is equipped with six integer and two fractional output dividers, allowing the generation of up to eight different output frequencies, ranging from 8 kHz to 1 GHz. Output frequencies can be completely independent of the input frequencies, and up to four of these frequencies can be completely independent of each other. The eight outputs may select among LVPECL, LVDS, HCSL or LVCMOS output levels.

The 8T49N286 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 8T49N286 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.

IDT’s third generation Universal Frequency Translator family also includes the 8T49N285 (2-in / 1-PLL / 8-out), and 8T49N287 (2-in / 2-PLL / 8-out), and the 8T49N242 (2-in / 1-PLL / 4-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.


  • Supports GR.1244 Stratum 3 stability in holdover mode
  • 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 8 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 100G Ethernet and STM-256/OC-768 applications
    • 0.3ps RMS (including spurs), 12 kHz to 20 MHz
  • Accepts up to four 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 40 MHz fundamental-mode crystal
  • Register programmable through I2C / SPI or via external I2C EEPROM
  • 8T49N286-998 “Boot from EEPROM"
  • 8T49N286-999 “powers up disabled"
  • Supported by IDT Timing Commander Software


This device is factory-configurable. Try the Custom Part Configuration Utility.
発注型名 Part Status Pkg. Type Lead Count (#) Description Temp. Range Carrier Type 購入/サンプル
Active VFQFPN 72 EEPROM 2-Byte addressing -40 to 85°C Tray
Active VFQFPN 72 EEPROM 2-Byte addressing -40 to 85°C Reel
Active VFQFPN 72 EEPROM 1-Byte addressing -40 to 85°C Tray
Active VFQFPN 72 EEPROM 1-Byte addressing -40 to 85°C Reel
Active VFQFPN 72 OTP -40 to 85°C Tray
Active VFQFPN 72 OTP -40 to 85°C Reel
Active VFQFPN 72 -40 to 85°C Tray
Active VFQFPN 72 -40 to 85°C Reel
Active VFQFPN 72 -40 to 85°C Reel
Active VFQFPN 72 -40 to 85°C Tray
Active VFQFPN 72 -40 to 85°C Reel


タイトル 他の言語 分類 形式 サイズ 日付
8T49N286 Datasheet データシート PDF 1.72 MB
PA# : PA20002 Product Advisory for Part Numbers 8T49N285/6/7‐996, ‐998,‐999 エラッタ PDF 191 KB
FemtoNG Universal Frequency Translator Ordering Product Information Guide マニュアル-ユーザーリファレンス PDF 270 KB
Timing Commander Installation Guide ガイド PDF 497 KB
UFT3G Register Write Sequences アプリケーションノート PDF 415 KB
App Note 932 - Description for Startup and Calibration for UFT3G Family アプリケーションノート PDF 604 KB
AN-828 Termination - LVPECL アプリケーションノート PDF 322 KB
AN-865 8T49N285_6_7 Frequency Synchronization Compliance Report アプリケーションノート PDF 1.13 MB
AN-872 How to Setup UFT3G Devices as a Zero Delay Buffer (ZDB) アプリケーションノート PDF 639 KB
AN-871 Generating SyncE Line Cards Using IDT UFT3G アプリケーションノート PDF 777 KB
AN-831 The Crystal Load curve アプリケーションノート PDF 395 KB
AN-860 8T49N28X Frequency Programming Guide アプリケーションノート PDF 301 KB
AN-846 Termination - LVDS アプリケーションノート PDF 133 KB
AN-845 Termination - LVCMOS アプリケーションノート PDF 146 KB
AN-844 Termination - AC Coupling Clock Receivers アプリケーションノート PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection アプリケーションノート PDF 495 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products アプリケーションノート PDF 128 KB
AN-840 Jitter Specifications for Timing Signals アプリケーションノート PDF 442 KB
AN-838 Peak-to-Peak Jitter Calculations アプリケーションノート PDF 115 KB
AN-839 RMS Phase Jitter アプリケーションノート PDF 233 KB
AN-832 Timing Budget and Accuracy アプリケーションノート PDF 131 KB
AN-833 Differential Input Self Oscillation Prevention アプリケーションノート PDF 180 KB
AN-834 Hot-Swap Recommendations アプリケーションノート PDF 153 KB
AN-836 Differential Input to Accept Single-ended Levels アプリケーションノート PDF 120 KB
AN-835 Differential Input with VCMR being VIH Referenced アプリケーションノート PDF 160 KB
AN-830 Quartz Crystal Drive Level アプリケーションノート PDF 143 KB
AN-827 Application Relevance of Clock Jitter アプリケーションノート PDF 1.15 MB
AN-815 Understanding Jitter Units アプリケーションノート PDF 565 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance アプリケーションノート PDF 136 KB
AN-801 Crystal-High Drive Level アプリケーションノート PDF 202 KB
AN-806 Power Supply Noise Rejection アプリケーションノート PDF 438 KB
AN-805 Recommended Ferrite Beads アプリケーションノート PDF 121 KB
PCN# : TP1912-01 Resolved Timing Marginality within the Feedback Divider Circuity 製品変更通知 PDF 163 KB
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility 製品変更通知 PDF 983 KB
PCN#: TP1901-01 Datasheet Correction for I2C Read Sequence Diagrams for the UFT Product Family 製品変更通知 PDF 454 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location 製品変更通知 PDF 583 KB
PCN# : N1609-01 Minor Design Change on Select Devices 製品変更通知 PDF 227 KB
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location 製品変更通知 PDF 596 KB
PCN# : W1512-01 Wafer Size change from 200mm to 300mm at Global Foundries 製品変更通知 PDF 188 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location 製品変更通知 PDF 544 KB
Timing Commander Installer (v1.16.2) ソフトウェア ZIP 18.44 MB
8T49N28x (UFT) Timing Commander Personality (v2.16) ソフトウェア ZIP 7.01 MB
8T49N286 IBIS Model モデル-IBIS ZIP 390 KB
Timing Solutions Products Overview 概要 PDF 4.11 MB
IDT Products for Wired Broadband Applications Application Briefs PDF 686 KB
IDT Products for Radio Applications (Japanese) English 製品概要 PDF 6.27 MB
Flexible Solutions for Fast Edge Rate and Low Phase Noise Requirements 概要 PDF 154 KB
IDT Clock Generation Overview (Japanese) English 概要 PDF 2.19 MB
IDT Clocks for Xilinx Ultrascale FPGAs 技術概要 PDF 256 KB
IDT Clock Distribution Overview (Japanese) English 概要 PDF 7.79 MB
IDT Clocks for Altera's Stratix V and Arria V/X FPGAs 技術概要 PDF 238 KB
IDT Clocks for SMPTE and Xilinx® 7 Series FPGAs 技術概要 PDF 566 KB
UFT SyncE Product Brief (Japanese) English, 简体中文 製品概要 PDF 1.32 MB
IDT Jitter Attenuator Product Overview 简体中文 概要 PDF 1.95 MB