PCK2020 Datasheet | NXP Semiconductors

INTEGRATED CIRCUITS PCK2020 CK00 (100/133MHz) spread spectrum differential system clock generator Product specification Supersedes data of 2000 Jul 25 2000 Nov 13 Philips Semiconductors Philips Semiconductors Product specification CK00 (100/133MHz) spread spectrum differential system clock generator Features - 3.3 V operation - Four differential CPU clock pairs - Ten PCI clocks at 3.3 V - Four 66 MHz clocks at 3.3 V - Two 48 MHz clocks at 3.3 V - Two 14.318 MHz reference clocks - 100 or 133 MHz operation - Power management control pins - CPU clock skew less than 200 ps cycle-to-cycle - CPU clock skew less than 150 ps pin-to-pin - 1.5 ns to 3.5 ns delay on PCI pins - Spread Spectrum capability DESCRIPTION The PCK2020 is a clock synthesizer/driver for a Pentium III and other similar processors. The PCK2020 has four differential pair CPU current source outputs, two Mref clock outputs running at 1/2 the CPU clock frequency depending on the state of SEL133/100 pin and four 3V66 clocks running at 66 MHz. There are ten PCI clock outputs running at 33 MHz and two 48 MHz clocks. Finally, there are two 3.3 V reference clocks at 14.318 MHz. All clock outputs meet Intel’s drive strength, rise/fall times, jitter, accuracy, and skew requirements. The part possesses a dedicated power-down input pin for power management control. This input is synchronized on-chip and ensures glitch-free output transitions. PIN CONFIGURATION VSSRef Ref0/Mult Sel0 Ref1/Mult Sel1 VDD3.3Ref XTAL_IN XTAL_OUT VSSPCI PCICLK0 PCICLK1 1 2 3 4 5 6 7 8 9 56 VDD3.3M 55 3VMref 54 3VMref_b 53 VSSM 52 SPREAD 51 CPUCLK0 50 CPUCLK0 49 VDD3.3CPU 48 CPUCLK1 47 CPUCLK1 46 VSSCPU 45 CPUCLK2 44 CPUCLK2 43 VDD3.3CPU 42 CPUCLK3 41 CPUCLK3 40 VSSCPU 39 I_REF 38 VDD3.3Core 37 VSSCore 36 VDD3.3 35 3V66_0 34 3V66_1 33 VSS 32 VSS 31 3V66_2 30 3V66_3 29 VDD3.3 VDD3.3PCI 10 PCICLK2 11 PCICLK3 12 VSSPCI 13 PCICLK4 14 PCICLK5 15 VDD3.3PCI 16 PCICLK6 17 PCICLK7 18 VSSPCI 19 PCICLK8 20 PCICLK9 21 VDD3.3PCI 22...