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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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PI6C671F датащи(PDF) 1 Page - Pericom Semiconductor Corporation |
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PI6C671F датащи(HTML) 1 Page - Pericom Semiconductor Corporation |
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1 / 7 page  392 PS8137A 03/15/99 Pin Configuration 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012 PI6C671F Clock Generator for Pentium Modules Block Diagram Description Supports Pentium or Pentium II CPU modules Spread Spectrum capability reduces EMI Low power consumption Four CPU Clocks with VDDQ2of3.3Vor2.5V Enhanced drive on CPUCLK0 Seven PCI synchronous clocks (3.3V) OneIOAPICClock@14.31818MHz (Power from pin 46), with VDDQ1 of3.3Vor2.5V Two48/24MHzclocks(3.3V) Six/eightSDRAMclocks(3.3V) ThreeRef.Clocks@14.31818MHz(3.3V) Internal crystal loading capacitor Ref. 14.31818 MHz crystal oscillator input Separate 66/60# MHz select pin Separate power management MODE control pin I2C 2-Wire Serial Interface 48-pin SSOP Package (V) and TSSOP (A) The PI6C671F is a mixed-voltage clock generator designed to providealltimingsignalsforIntelPentium/PentiumIImodule-based motherboards. It provides four CPU, seven PCI, and up to eight SDRAM clocks. Additionally, three reference clocks (same fre- quency as the crystal) and two selectable 24/48 MHz clocks are available. Pericom design improvements resulted in a low-power device optimized for 2.5V CPU operation. A special spread-spectrum feature may be enabled to minimize EMI. The two-wire I2C serial interface can be used to reduce circuit noise and power consumption. I2C control lets you enable/disable each clock output driver, change CPU frequencies, and select 24 or 48 MHz outputs. A power-down function (pin 44) puts the whole system in a low- power mode by stopping the crystal oscillator and both PLLs. CPU andPCIclocksmayalsobestoppedbytheCPU_STOP#(pin27),and PCI _STOP# (pin 26) functions. Note:Purchase of I2C components from Pericom conveys a license to use them in an I2C system as defined by Philips. Features All trademarks are of their respective companies. REF1 1 REF0 2 VSS 3 XIN 4 XOUT 5 MODE 6 VDDQ37 PCICLK_F 8 PCICLK0 9 VSS 10 PCICLK1 11 PCICLK2 12 PCICLK3 13 PCICLK4 14 VDDQ315 PCICLK5 16 VSS 17 SEL66/60# 18 SDATA 19 SDCLK 20 VDDQ321 48/24MHz 22 48/24MHz 23 VSS 24 VDD REF2 VDDQ1 IOAPIC0 PWR_DWN# VSS CPUCLK0 CPUCLK1 VDDQ2 48 CPUCLK2 47 CPUCLK3 46 VSS 45 SDRAM0 44 SDRAM1 43 VDDQ3 42 SDRAM2 41 SDRAM3 40 VSS 39 SDRAM4 38 SDRAM5 37 VDDQ3 36 SDRAM6/CPU_STOP# 35 SDRAM7/PCI_STOP# 34 VDD 33 32 31 30 29 28 27 26 25 48-Pin A, V VDDQ1 VDDQ3 VDDQ2 ÷2 SEL REF OSC PLL1 PLL2 XOUT XIN 4 Up to 8 6 REF0,1,2 IOAPIC0 CPUCLK0-3 SDRAM0-7 PCICLK0-5 PCICLK_F 48/24 MHz 48/24 MHz 3 Buffers |
Аналогичный номер детали - PI6C671F |
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Аналогичное описание - PI6C671F |
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