IMISC670

www.DataSheet4U.com SC670 I2C Clock Generator for Pentium Notebook Designs. Approved Product PRODUCT FEATURES SEL FREQUENCY TABLE CPU 60.0 66.6 PCI 30.0 33.3 0 1 Supports Pentium & Pro CPUs. 4 CPU clocks up to 8 loads. Up to 8 SDRAM clocks for 2 DIMs. Supports Power Savings Frequencies. 7 PCI synchronous clocks. Optional common or mixed supply mode: (Vdd = Vddq3 = Vddq2 = 3.3V) or (Vdd = Vddq3 = 3.3V, Vddq2 = 2.5V) < 250ps skew CPU and SDRAM clocks. < 250ps skew among PCI clocks. I2C 2-Wire serial interface Programmable registers featuring: - enable/disable each output pin - mode as tri-state, test, or normal - 24/48 MHz selections 1 IOAPIC clock for multiprocessor support. 48-pin SSOP package CONNECTION DIAGRAM IMISC670 REF1 REF0 Vss Xin Xout MODE Vddq3 PCICLK_F PCICLK0 Vss PCICLK1 PCICLK2 PCICLK3 PCICLK4 Vddq3 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 Vdd N/C (See note 1) Vddq2 IOAPIC0 PWR_DWN# Vss CPUCLK0 CPUCLK1 Vddq2 CPUCLK2 CPUCLK3 Vss SDRAM0 SDRAM1 Vddq3 SDRAM2 SDRAM3 Vss SDRAM4 SDRAM5 Vddq3 SDRAM6/CPU_STOP# SDRAM7/PCI_STOP# Vdd BLOCK DIAGRAM 3 Xin Xout REF OSC Vddq2 IOAPIC0 REF0:1 PCICLK5 Vss SEL SDATA SDCLK Vddq3 48/24MHZ 48/24MHZ Vss SDATA SDCLK Vddq2 4 Vddq3 CPUCLK0~3 8 6 SDRAM0~7 PCICLK0~5 SEL PLL1 dly PCI_STOP# CPU_STOP# PWR_DWN# MODE PCICLK_F 48/24MHZ PLL2 48/24MHZ Note 1: N/C is a no connect pin. IMI product does not requir...