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Texas Instruments LMK00334/38时钟缓冲器/电平转换器

Texas Instruments LMK00334/38时钟缓冲器/电平转换器设计用于高频率、低抖动时钟/数据分配和电平转换。输入时钟可从两个通用输入或一个晶体输入选择。选中输入时钟被分配给两组2 HCSL (4 HCSL LMK00338)输出和一个LVCMOS输出。LVCMOS输出有一个同步启用输入，启用或禁用时可实现短脉冲自由操作。LMK00334/38工作于一个3.3V核心电源和3个独立3.3 V/2.5 V输出电源。LMK00334/38具有高 性能、多功能和电源效率，使其成为取代固定输出缓冲器器件、同时增加系统时序裕量的理想选择。

特性

  • 3:1 Input Multiplexer
    • Two Universal Inputs Operate up to 400MHz and Accept LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or Single-Ended Clocks
    • One Crystal Input Accepts a 10 to 40MHz Crystal or Single-Ended Clock
  • Two Banks with 2 Differential Outputs Each
    • HCSL, or Hi-Z (Selectable)
    • Additive RMS Phase Jitter for PCIe Gen3 at 100MHz: 30 fs RMS (typical)
  • High PSRR: -72dBc at 156.25 MHz
  • LVCMOS Output with Synchronous Enable Input
  • Pin-Controlled Configuration
  • VCC Core Supply: 3.3V ± 5%
  • 3 Independent VCCO Output Supplies: 3.3V/2.5V ± 5%
  • Industrial Temperature Range: -40°C to +85°C
  • 32-lead WQFN - 5mm x 5mm (LMK00334)
  • 40-lead WQFN - 6mm x 6mm (LMK00338)

应用

  • Clock Distribution and Level Translation for ADCs, DACs, Multi-Gigabit Ethernet, XAUI, Fibre Channel, SATA/SAS, SONET/SDH, CPRI, High-Frequency Backplanes
  • Switches, Routers, Line Cards, Timing Cards
  • Servers, Computing, PCI Express (PCIe 3.0)
  • Remote Radio Units and Baseband Unit

Datasheets

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发布日期: 2014-02-21 | 更新日期: 2024-06-25