ICS951601

www.DataSheet4U.com Integrated Circuit Systems, Inc. ICS951601 Preliminary Product Preview General Purpose Frequency Timing Generator Recommended Application: General Purpose Clock Generator Output Features: 17 - PCI clocks selectable, either 33.33MHz or 66.6MHz @ 3.3V 1 - 48MHz @ 3.3V 1 - REF @ 3.3V, 14.318MHz. Features: Programable Spread spectrum precentage for EMI control Uses external 14.318MHz crystal Select pins for frequency select Pin Configuration REF0 VDD X1 X2 GND SDATA SCLK GNDA VDDA SEL1A PCI1A_0 PCI1A_1 VDD33 GND PCI1A_2 PCI1A_3 GND VDD33 PCI1A_4 PCI1A_5 VDD33 GND PCI1A_6 PCI1A_7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 48MHz GND VDD48 SPREAD VDDA GNDA SEL2B PCI2B_2 PCI2B_1 GND VDD66 PCI2B_0 SEL2A PCI2A_2 PCI2A_1 VDD2A GND PCI2A_0 SEL1B PCI1B_2 PCI1B_1 GND VDD1B PCI1B_0 Key Specifications: PCI – PCI output skew within same bank @ 33MHz: <170ps PCI – PCI output skew within same bank@ 66MHz: <340ps Cycle to Cycle Jitter PCI @ 33MHz: <200ps Cycle to Cycle Jitter PCI @ 66MHz: <200ps Cycle to Cycle Jitter 48MHz: <350ps Cycle to Cycle Jitter REF: <500ps Slew Rate: 1.5 - 4 V/ns. (PCI spec.) 48-pin SSOP *120K ohm pull-up to VDD on indicated inputs. Block Diagram PLL2 48MHz X1 X2 XTAL OSC PLL1 Spread Spectrum PCI DIVDER REF0 8 PCI1A (7:0) PCI DIVDER 3 PCI2A (2:0) SDATA SCLK SELA (2:1) SELB (2:1) SPREAD Control Logic Config. Reg. PCI DIVD...