W147

更新时间： 2024-11-04 22:14:55

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		/
页数	文件大小	规格书
12页	143K
描述
Frequency Generator for Integrated Core Logic

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中文翻译

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W147 数据手册

PRELIMINARY

W147G

Frequency Generator for Integrated Core Logic

Features

Key Specifications

• Maximized EMI suppression using Cypress’s Spread

Spectrum Technology

• Low jitter and tightly controlled clock skew

• Highly integrated device providing clocks required for

CPU, core logic, and SDRAM

• Three copies of CPU clock at 66/100 MHz

• Nine copies of 100-MHz SDRAM clocks

• Eight copies of PCI clock

CPU, SDRAM Outputs Cycle-to-Cycle Jitter: ..............250 ps

APIC, 48MHz, 3V66, PCI Outputs

Cycle-to-Cycle Jitter: ...................................................500 ps

APIC, 48MHz, SDRAM Output Skew: .........................250 ps

CPU, 3V66 Output Skew: ............................................175 ps

PCI Output Skew:........................................................500 ps

CPU to SDRAM Skew (@ 100 MHz):.................4.5 to 5.5 ns

CPU to 3V66 Skew (@ 66 MHz): .......................7.0 to 8.0 ns

3V66 to PCI Skew (3V66 lead):..........................1.5 to 3.5 ns

PCI to APIC Skew: .....................................................±0.5 ns

• Two copies of synchronous APIC clock

• Two copies of 48-MHz clock (non-spread spectrum) op-

timized for USB reference input and video dot clock

• Two copies of 66-MHz fixed clock

• One copy of 14.31818-MHz reference clock

• Power-down control

Table 1. Pin Selectable Functions

SEL1

SEL0

Function

Three-state

Test

• I C interface for turning off unused clocks

66-MHz CPU

100-MHz CPU

Block Diagram

Pin Configuration

VDDQ3

REF/APICDIV

VDDQ3

GND

APIC0

REF/APICDIV

APIC1

VDDQ2

CPU0

VDDQ2

CPU1

CPU2_ITP

GND

SDRAM0

SDRAM1

VDDQ3

SDRAM2

SDRAM3

GND

SDRAM4

SDRAM5

VDDQ3

SDRAM6

SDRAM7

GND

DCLK

VDDQ3

PWRDWN#

SCLK

SDATA

SEL1

XTAL

OSC

GND

PLL REF FREQ

VDDQ2

CPU0:1

3V66_0

3V66_1

VDDQ3

PCI0_ICH

PCI1

Divider,

Delay,

and

Phase

Control

Logic

I²C

Logic

SDATA

SCLK

CPU2_ITP

APIC0:1

PCI2

GND

VDDQ3

PCI3

PLL 1

3V66_0:1

SEL0:1

PCI4

GND

PCI5

PCI0_ICH

PCI1:7

PCI6

PCI7

VDDQ3

VDD3

GND

USB

DOT

VDDQ3

SEL0

DCLK

PWRDWN#

SDRAM0:7

VDDQ3

USB

PLL2

DOT

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

October 13, 1999, rev. **

12 3 4 5 6 7...12

中文翻译

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与W147相关器件

型号	品牌	获取价格	描述	数据表
W147G	CYPRESS	获取价格	Frequency Generator for Integrated Core Logic
W147GH	CYPRESS	获取价格	Processor Specific Clock Generator, CMOS, PDSO56, 0.300 INCH, SSOP-56
W147GHT	CYPRESS	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO56, 0.300 INCH, SSOP-56
W149	CYPRESS	获取价格	440BX AGPset Spread Spectrum Frequency Synthesizer
W149	SPECTRALINEAR	获取价格	440BX AGPset Spread Spectrum Frequency Synthesizer
W149_02	CYPRESS	获取价格	440BX AGPset Spread Spectrum Frequency Synthesizer
W149H	ETC	获取价格	CPU System Clock Generator
W149HT	CYPRESS	获取价格	Processor Specific Clock Generator, 124MHz, CMOS, PDSO48, 0.300 INCH, SSOP-48
W14B	NSC	获取价格	14 Lead Ceramic Flatpack NS Package Number W14B
W15	ETC	获取价格	15 Watt - Single Output Regulated Power Supplies

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