I2C Clock Generator
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SC670
I2C Clock Generator for Pentium Notebook Designs.
Approved Product PRODUCT FEATURES
SEL
FREQ...
Description
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...
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