概览

The IDT9248-39 generates all clocks required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro or Cyrix. Eight different reference frequency multiplying factors are externally selectable with smooth frequency transitions.
  • 3.3V outputs: SDRAM, PCI, REF, 48/24MHz
  • 2.5V outputs: CPU, IOAPIC
  • 20 ohm CPU clock output impedance
  • 20 ohm PCI clock output impedance
  • Skew from CPU (earlier) to PCI clock - 1.5 to 4 ns, center 2.6 ns.
  • No external load cap for CL=18pF crystals
  • ±175 ps CPU clock skew
  • 250ps (cycle to cycle) CPU jitter
  • Smooth frequency switch, with selections from 66.8 to 150 MHz CPU.
  • I2C interface for programming
  • 3ms power up clock stable time
  • Clock duty cycle 45-55%.
  • 48 pin 300 mil SSOP package
  • 3.3V operation, 5V tolerant inputs (with series R)
  • 5ns propagation delay SDRAM from Buffer Input

文档

= 相关文档
类型 文档标题 日期
数据手册
9248-39 Datasheet
PDF 324 KB
End Of Life Notice
PDN# : CQ-17-04(R1) Product Discontinuance Notice
PDF 606 KB
End Of Life Notice
PDN# : CQ-17-04 Product Discontinuance Notice
PDF 599 KB
产品变更通告
PCN# : A1506-02 Gold wire to Copper wire
PDF 35 KB
产品变更通告
PCN# : A1504-04 Assembly Transfer from Amkor Philippines to OSE Taiwan
PDF 484 KB
产品变更通告
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products
PDF 361 KB
6 items

设计和开发

ECAD 模块

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

扩展 ECAD 模块
Diagram of ECAD Models

产品选择

    Processing table
    Pkg. Type
    Lead Count (#)
    Temp. Grade
    Pb (Lead) Free
    Carrier Type
    购买 / 样片
    器件号
    9248DF-39LF
    circle过时
    memory
    view_in_ar
    		SSOP 48 C Yes Tube
    9248DF-39LFT
    circle过时
    memory
    view_in_ar
    		SSOP 48 C Yes Reel
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