CY28381OC Datasheet

IC型號：
CY28381OC
PDF描述：
High-Performance SiS645DX/648DX/650/651 Intel Pentium 4 Cloc...
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144.96KB
PDF頁數(shù)：
19頁
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CYPRESS

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CY28381

High-Performance SiS645DX/648DX/650/651

Intel Pentium

錚?/div>

4 Clock Synthesizer

Features

鈥?/div>

Supports Pentium

廬

4-type CPUs

3.3V power supply

Eight copies of PCI clocks

One 48-MHz USB clock

Two copies of ZCLK cocks

One 48-MHz/24-MHz Programmable SIO clock

Two differential CPU clock pairs

鈥?SMBus support with readback capabilities

鈥?Spread Spectrum electromagnetic interference (EMI)

reduction

鈥?Dial-A-Frequency

廬

features

鈥?Dial-A-Ratio鈩?features

鈥?Dial-A-dB鈩?features

鈥?48-pin SSOP Package

鈥?Watchdog function

Block Diagram

XIN

XOUT

PLL1

CPU_STP#

IREF

FS[0:4]

MULT0

VTT_PWRGD

PCI_STP#

PLL2

Power

Latch

Pin Configuration

[1]

REF(0:2)

CPUT[0:1]

CPUC[0:1]

SDCLK

AGP[0:1]

ZCLK[0:1]

PCI[0:5]

PCIF[0:1]

48M

48M_24M#

VDDR

**FS0/REF0

**FS1/REF1

**FS2/REF2

VSSR

XIN

XOUT

VSSZ

ZCLK0

ZCLK1

VDDZ

*SRESET#/PCI_STP#

VDDP

**FS3/PCIF0

**FS4/PCIF1

PCI0

PCI1

VSSP

VDDP

PCI2

PCI3

PCI4

PCI5

VSSP

PD#

SDATA

SCLK

Logic

I2C

Logic

SRESET#

VDDSD

SDCLK

VSSSD

CPU_STP#*

CPUT1

CPUC1

VDDC

VSSC

CPUT0

CPUC0

IREF

VSSA

VDDA

SCLK

SDATA

PD#/VTT_PWRGD*

VSSAGP

AGP0

AGP1

VDDAGP

VDD48M

48M

24_48M/MULT0*

VSS48M

48 pin SSOP

CY28381

Note:

1. Pins marked with [*] have internal 150K pull-up resistors. Pins marked with [**] have internal 150K pull-down resistors.

Cypress Semiconductor Corporation

Document #: 38-07546 Rev. **

鈥?/div>

3901 North First Street

鈥?/div>

San Jose

CA 95134

鈥?/div>

408-943-2600

Revised May 20, 2003

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CY28381OC Datasheet

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