The IDT840NT4-01I is clock generator designed to provide ethernet and USB clocks for Freescale B4/ T4-based systems. The IDT840NT4-01I utilizes IDT’s FemtoClock NG® PLL technology to synthesize eight low phase-jitter Ethernet reference clocks. The clock generator also provides a 24MHz USB reference clock and a 25MHz reference output.

Features

  • Ten LVCMOS clock outputs:
    Five LVCMOS 125MHz Ethernet outputs
    Three LVCMOS 25MHz /125MHz Ethernet outputs
    One LVCMOS 24MHz USB output
    One LVCMOS 25MHz REF output
  • QREF output; can be used to drive X1 of other devices, saving a crystal
  • Selectable crystal input, or differential LVPECL input; test mode
  • RMS Phase Jitter, 125MHz, integration range 12kHz - 20MHz: 0.75ps (typical)
  • Cycle-to-Cycle jitter: 75ps (typical)
  • Flexible voltage supply modes; supports legacy and future system requirements, minimizes power consumption
    Core voltage: (VDD, VDD_XTAL, VDDA)/
    Output voltage: (VDDO_A, VDDO_B, VDDO_C, VDDO_REF)
    Core / Output
    3.3V / 3.3V
    3.3V / 2.5V
    3.3V / 1.8V
    2.5V / 2.5V
    2.5V / 1.8V
  • -40°C to 85°C ambient operating temperature
  • Space-saving Pb-free, 48-pin 7x7mm QFN; minimal board space
  • Lead-free (RoHS 6) packaging

Product Options

注文可能な製品ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type パッケージ 購入/サンプル
840NT4-01NLGI Active VFQFPN 48 I はい Tray Package Info
Availability
840NT4-01NLGI8 Active VFQFPN 48 I はい Reel Package Info
Availability

Documentation & Downloads

タイトル 他の言語 Type 形式 サイズ 日付
データシート
840NT4-01 Datasheet Datasheet PDF 760 KB
アプリケーションノート、ホワイトペーパー
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-831 The Crystal Load curve Application Note PDF 395 KB
AN-845 Termination - LVCMOS Application Note PDF 146 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 128 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 115 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 180 KB
AN-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 133 KB
AN-832 Timing Budget and Accuracy Application Note PDF 131 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 120 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 160 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 143 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 136 KB
AN-801 Crystal-High Drive Level Application Note PDF 202 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PCN / PDN
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB
その他資料
Timing Solutions Products Overview Overview PDF 4.11 MB
IDT Products for Radio Applications (日本語) English Product Brief PDF 2.34 MB
IDT Products for Radio Applications (日本語) English Product Brief PDF 2.34 MB
IDT Clock Generation Overview (日本語) English Overview PDF 1.83 MB
IDT Clock Distribution Overview (日本語) English Overview PDF 3.79 MB
IDT Clock Generation Overview (日本語) English Overview PDF 1.83 MB
IDT Clock Distribution Overview (日本語) English Overview PDF 3.79 MB