PCK2021 Datasheet | NXP Semiconductors

Features - 3.3 V operation - Six differential CPU clock pairs - Two PCI clocks at 33 MHz and one 3V66 clock - Two 48 MHz clocks at 3.3 V - One 14.318 MHz reference clock - Power management control pins - Host clock jitter less than 200 ps cycle-to-cycle - Host clock skew less than 150 ps pin-to-pin - Spread Spectrum capability - Optimized frequency and spread spectrum performance DESCRIPTION The PCK2021 is a clock synthesizer/driver for a Pentium III™ and other similar processors. The PCK2021 has six differential pair CPU current source outputs, two 33 MHz outputs, one 3V66 output, and two 48 MHz clocks which can be disabled on power-up, and one 3.3 V reference clock at 14.318 MHz which can also be disabled on power-up. 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. In addition, the part can be configured to disable the 48 MHz outputs for lower power operation and an increase in the performance of the functioning outputs. The REF and PCI outputs can also be disabled for the highest performance of the Host outputs. PIN CONFIGURATION VDDPCI 1 VDD48 48M_0/SELA 48M_1/SELB VSS48 3V66 VSS3V66 VDD3V66 VDDCPU 2 3 4 5 6 7 8 9 48 PCI0 47 PCI1 46 VSSPCI 45 SEL133/100 44 NC 43 VDDA 42 VSSA 41 PWRDWN 40 VDDCPU 39 HCLK3 38 HCLKB3 37 VDDCPU 36 HCLK4 35 HCLKB4 34 VSSCPU 33 HCLK5 32 HCLKB5 31 VDD 30 MULTSEL0 29 MULTSEL1 28 VSS 27 VSSIREF 26 IREF 25 VDDIREF HCLK0 10 HCLKB0 11 VDDCPU 12 HCLK1 13 HCLKB1 14 VSSCPU 15 HCLK2 16 HCLKB2 17 VDDCPU 18 REF 19 SPREAD 20 VSSREF 21 XIN 22 XOUT 23 VDDREF 24 SW00960 ORDERING INFORMATION PACKAGES 48-Pin Plastic TSSOP 48-Pin Plastic SSOP TEMPERATURE RANGE 0 to +70 °C 0 to +70 °C ORDER CODE PCK2021DGG PCK2021DL DRAWING NUMBER SOT362-1 SOT370-1 Intel and Pentium III are trademarks of Intel Corporation. 2001 Oct 11 853-2301 27233 Philips Semiconductors Product data CK00 (100/133 MHz) spread spectrum differential system clock...