Datasheet > CY2276APVC-31T

CY2276APVC-31T

更新时间： 2024-09-30 20:09:03

品牌	Logo	应用领域
赛普拉斯 - CYPRESS		时钟光电二极管外围集成电路晶体
页数	文件大小	规格书
13页	204K
描述
Processor Specific Clock Generator, 66.654MHz, MOS, PDSO56, SSOP-56

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技术参数
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CY2276APVC-31T 技术参数

生命周期：	Obsolete	零件包装代码：	SSOP
包装说明：	SSOP,	针数：	56
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.84
JESD-30 代码：	R-PDSO-G56	长度：	18.415 mm
端子数量：	56	最高工作温度：	70 °C
最低工作温度：		最大输出时钟频率：	66.654 MHz
封装主体材料：	PLASTIC/EPOXY	封装代码：	SSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, SHRINK PITCH
主时钟/晶体标称频率：	14.318 MHz	认证状态：	Not Qualified
座面最大高度：	2.794 mm	最大压摆率：	310 mA
最大供电电压：	3.465 V	最小供电电压：	3.135 V
标称供电电压：	3.3 V	表面贴装：	YES
技术：	MOS	温度等级：	COMMERCIAL
端子形式：	GULL WING	端子节距：	0.635 mm
端子位置：	DUAL	宽度：	7.5 mm
uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, PROCESSOR SPECIFIC	Base Number Matches：	1

CY2276APVC-31T 数据手册

CY2276A-21

CY2276A-31

Pentium /II Clock Synthesizer/Driver for Desktop PCs

with Intel 82440LX and 3–4 DIMMs

outputs available from each device, as shown in the Selector

Guide.

Features

• Mixed 2.5V and 3.3V operation

• Single-chip clock solution to meet requirements of Pen-

tium® and Pentium® II motherboards

The CY2276A-21 is ideal for four-SDRAM module or server

applications that require sixteen SDRAM clocks, and do not

require the ability to stop CPU clocks. The CY2276A-31 is ide-

al for single-processor or dual-processor desktop systems,

which require an extra CPU clock.

— Multiple CPU clocks at 2.5V supporting single and

dual-processor systems

— Seven synchronous PCI clocks

— Multiple 2.5V IOAPIC clocks at 14.318 MHz

— Multiple 3.3V SDRAM clocks

All CY2276A outputs are designed for low EMI emissions.

Controlled rise and fall times, unique output driver circuits and

factory-EPROM programmable output drive and slew-rate en-

able optimal configurations for EMI control.

— Multiple 3.3V USB and I/O clocks

— Multiple 3.3V Ref. clocks at 14.318 MHz

CY2276A Selector Guide.

• I C™ Serial Configuration Interface

Clock Outputs

CPU (60, 66.6 MHz)

SDRAM

-21

-31

• Factory-EPROM programmable output drive and slew

rate for EMI customization

• Factory-EPROM programmable clock frequencies for

custom configurations

PCI (CPU/2 MHz)

IOAPIC (14.318 MHz)

USB/IO (48 MHz)

IO (24 MHz)

• High drive, low skew, and low jitter outputs

• Available in space-saving 56-pin SSOP package

Functional Description

The CY2276A-21 andCY2276A-31 are single-chip clock gen-

erators for Pentium or Pentium II systems designed with the

Intel® 82440LX or similar chipset. They differ in the number of

Ref. (14.318 MHz)

CPU-PCI delay

1–6 ns

1–5 ns

Logic Block Diagram

IOAPIC (14.318 MHz)

V_DDQ2

REF (14.318 MHz)

XTALIN

14.318

MHz

OSC.

XTALOUT

CPU

PLL

CPUCLK

V_DDCPU

SDRAM

SEL

EPROM

Available on -31 only

EPROM

Prog.

Delay

PCI [0–6]

SYS

PLL

USBCLK (48 MHz)

IOCLK (24 MHz)

SERIAL

SCLK

INTERFACE

CONTROL

LOGIC

SDATA

Please refer to Selector Guide for exact number of outputs on each device

Intel and Pentium are registered trademarks of Intel Corporation.

I²C is a trademark of Philips Corporation.

Cypress Semiconductor Corporation

•

3901 North First Street

•

San Jose

•

CA 95134

•

408-943-2600

October 12, 1998

12 3 4 5 6 7...13

中文翻译

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与CY2276APVC-31T相关器件

型号	品牌	获取价格	描述	数据表
CY2276APVC-4	CYPRESS	获取价格	Processor Specific Clock Generator, 66.654MHz, MOS, PDSO56, SSOP-56
CY2276PVC-1	ETC	获取价格	CPU System Clock Generator
CY2276PVC-2	ETC	获取价格	CPU System Clock Generator
CY2276PVC-3	ETC	获取价格	CPU System Clock Generator
CY2276PVC-4	ETC	获取价格	CPU System Clock Generator
CY2277A	CYPRESS	获取价格	6x86, K6 Clock Synthesizer/Driver for Desktop Mobile PCs with Intel 82430TX and 2 DIMMs or
CY2277A	SPECTRALINEAR	获取价格	Pentium㈢/II, 6x86, K6 Clock Synthesizer/Drive
CY2277APAC-12	CYPRESS	获取价格	Processor Specific Clock Generator, 83.3MHz, CMOS, PDSO48, TSSOP-48
CY2277APAC-12M	SPECTRALINEAR	获取价格	Pentium㈢/II, 6x86, K6 Clock Synthesizer/Drive
CY2277APAC-12M	CYPRESS	获取价格	6x86, K6 Clock Synthesizer/Driver for Desktop Mobile PCs with Intel 82430TX and 2 DIMMs or

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