Datasheet > ICS9248YF-39LF-T

ICS9248YF-39LF-T

更新时间： 2024-09-25 21:15:55

品牌	Logo	应用领域
艾迪悌 - IDT		时钟光电二极管外围集成电路晶体
页数	文件大小	规格书
17页	680K
描述
Processor Specific Clock Generator, 150MHz, PDSO48, 0.300 INCH, LEAD FREE, SSOP-48

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技术参数
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ICS9248YF-39LF-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Obsolete	零件包装代码：	SSOP
包装说明：	SSOP,	针数：	48
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.73
JESD-30 代码：	R-PDSO-G48	JESD-609代码：	e3
长度：	15.875 mm	端子数量：	48
最高工作温度：	70 °C	最低工作温度：
最大输出时钟频率：	150 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	峰值回流温度（摄氏度）：	260
主时钟/晶体标称频率：	14.31818 MHz	认证状态：	Not Qualified
座面最大高度：	2.794 mm	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：	CMOS
温度等级：	COMMERCIAL	端子面层：	Matte Tin (Sn)
端子形式：	GULL WING	端子节距：	0.635 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	30
宽度：	7.493 mm	uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, PROCESSOR SPECIFIC
Base Number Matches：	1

ICS9248YF-39LF-T 数据手册

ICS9248-39

Integrated

Circuit

Systems, Inc.

Frequency Generator & Integrated Buffers for PENTIUM/Pro^TM

General Description

Features

•

3.3V outputs: SDRAM, PCI, REF, 48/24MHz

The ICS9248-39 generates all clocks required for high

speed RISC or CISC microprocessor systems such as

Intel PentiumPro or Cyrix. Eight different reference

frequency multiplying factors are externally selectable

with smooth frequency transitions.

2.5V outputs: CPU, IOAPIC

20 ohm CPU clock output impedance

20 ohm PCI clock output impedance

Skew from CPU (earlier) to PCI clock - 1.5 to 4 ns,

center 2.6 ns.

•

No external load cap for C_L=18pF crystals

175 ps CPU clock skew

Features include two CPU, six PCI and thirteen SDRAM

clocks. Two reference outputs are available equal to the

crystal frequency. Plus the IOAPIC output powered by

VDDL1. One 48 MHz for USB, and one 24 MHz clock for

Super IO. Spread Spectrum built in at 0.5% or 0.25%

modulation to reduce the EMI. Serial programming I²C

interfaceallowschangingfunctions, stopclockprograming

and Frequency selection. Additionally, the device meets

the Pentium power-up stabilization, which requires that

CPU and PCI clocks be stable within 2ms after power-up.

It is not recommended to use I/O dual function pin for the

slots (ISA, PIC, CPU, DIMM).The add on card might have

a pull up or pull down.

250ps (cycle to cycle) CPU jitter

Smooth frequency switch, with selections from 66.8

to 150 MHz CPU.

•

I²C interface for programming

3ms power up clock stable time

Clock duty cycle 45-55%.

48 pin 300 mil SSOP package

3.3V operation, 5V tolerant inputs (with series R)

<5ns propagation delay SDRAM from Buffer Input

Pin Configuration

High drive PCICLK and SDRAM outputs typically provide

greater than 1 V/ns slew rate into 30pF loads. CPUCLK

outputs typically provide better than 1V/ns slew rate into

20pFloadswhilemaintaining50 5%dutycycle.TheREF

and 24 and 48 MHz clock outputs typically provide better

than 0.5V/ns slew rates into 20pF.

Block Diagram

48-Pin SSOP

* Internal Pull-up Resistor of 240K to VDD

** Internal Pull-down resistor of 240K to GND

Power Groups

VDD1 = REF (0:1), X1, X2

VDD2 = PCICLK_F, PCICLK(0:4)

VDD3 = SDRAM (0:12), supply for PLL core

VDD4 = 24MHz, 48MHz

VDDL1 = IOAPIC

VDDL2 = CPUCLK 1, CPUCLK_F

0277H—06/22/06

12 3 4 5 6 7...17

中文翻译

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与ICS9248YF-39LF-T相关器件

型号	品牌	获取价格	描述	数据表
ICS9248YF-39-T	IDT	获取价格	Processor Specific Clock Generator, 150MHz, PDSO48, 0.300 INCH, SSOP-48
ICS9248YF-50	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO28, 0.209 INCH, SSOP-28
ICS9248YF-50LF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO28, 0.209 INCH, SSOP-28
ICS9248YF-50LF-T	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDSO28, 0.209 INCH, MO-150, SSOP-28
ICS9248YF-64	ICSI	获取价格	AMD-K7TM System Clock Chip
ICS9248YF-65	ICSI	获取价格	Frequency Timing Generator for PENDIUM II Systems
ICS9248YF-66	ICSI	获取价格	Frequency Timing Generator for PENTIUM II Systems
ICS9248YF-66	IDT	获取价格	Processor Specific Clock Generator, 133.3MHz, PDSO48, SSOP-48
ICS9248YF-66LF	IDT	获取价格	Processor Specific Clock Generator, 133.3MHz, PDSO48, SSOP-48
ICS9248YF-72	ICSI	获取价格	Frequency Timing Generator for PENTIUM II Systems

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