NOTICE - The following device(s) are recommended alternatives:

The 8344I is a low voltage, low skew fanout buffer and a member of the family of High Performance Clock Solutions from IDT. The 8344I has two selectable clock inputs. The CLK0, nCLK0 and CLK1, nCLK1 pairs can accept most standard differential input levels. The 8344I is designed to translate any differential signal levels to LVCMOS/LVTTL levels. The low impedance LVCMOS/LVTTL outputs are designed to drive 50Ω series or parallel terminated transmission lines. The effective fanout can be increased to 48 by utilizing the ability of the outputs to drive two series terminated lines. Redundant clock applications can make use of the dual clock input. The dual clock inputs also facilitate board level testing. 8344I is characterized at full 3.3V, full 2.5V and mixed 3.3V input and 2.5V output operating supply modes.

Guaranteed output and part-to-part skew characteristics make the 8344I ideal for those clock distribution applications demanding well defined performance and repeatability.

特長

  • Twenty-four LVCMOS/LVTTL outputs, 7Ω typical output impedance
  • Two selectable differential clock input pairs for redundant clock applications
  • CLKx, nCLKx pair can accept the following differential input levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL
  • Maximum output frequency: 100MHz
  • Translates any single-ended input signal to LVCMOS/LVTTL with resistor bias on nCLK input
  • Multiple output enable pins for disabling unused outputs in reduced fanout applications
  • Output skew: 275ps (maximum)
  • Part-to-part skew: 600ps (maximum)
  • Bank skew: 150ps (maximum)
  • Supply modes:
    Core/Output
    3.3V/3.3V
    3.3V/2.5V
    2.5V/2.5V
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

製品選択

発注型名 Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type 購入/サンプル
8344BYILF
Obsolete TQFP 48 I はい Tray
Availability
8344BYILFT
Obsolete TQFP 48 I はい Reel
Availability

ドキュメント&ダウンロード

タイトル 他の言語 分類 形式 サイズ 日付
データシート
8344I Datasheet データシート PDF 254 KB
アプリケーションノート、ホワイトペーパー
AN-828 Termination - LVPECL アプリケーションノート PDF 322 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-840 Jitter Specifications for Timing Signals アプリケーションノート PDF 442 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-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-805 Recommended Ferrite Beads アプリケーションノート PDF 121 KB
PCN / PDN
PDN# : CQ-16-04 QUARTER MARKET DECLINED PDN 製品中止通知 PDF 560 KB
PDN# : CQ-16-02 Quarter PDN for Declined Market 製品中止通知 PDF 592 KB
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly 製品変更通知 PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly 製品変更通知 PDF 611 KB
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages 製品変更通知 PDF 95 KB
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages 製品変更通知 PDF 50 KB
PCN#: A1309-03 Additional Assembly Sources 製品変更通知 PDF 398 KB
PCN# : TB1303-01 Change of Carrier Tape for TQFP-32, TQFP-48 製品変更通知 PDF 472 KB
ダウンロード
8344I IBIS Model モデル-IBIS ZIP 48 KB
その他資料
IDT Clock Distribution Overview (Japanese) English 概要 PDF 7.79 MB
IDT Clock Generation Overview (Japanese) English 概要 PDF 2.19 MB

ニュース&各種リソース