Datasheet > 9248DF-39

9248DF-39

更新时间： 2024-11-29 20:11:31

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
18页	321K
描述
Processor Specific Clock Generator, 150MHz, PDSO48, 0.300 INCH, SSOP-48

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9248DF-39 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
零件包装代码：	SSOP	包装说明：	0.300 INCH, SSOP-48
针数：	48	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.74	JESD-30 代码：	R-PDSO-G48
JESD-609代码：	e0	长度：	15.875 mm
湿度敏感等级：	1	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	封装等效代码：	SSOP48,.4
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：	225	电源：	2.5,3.3 V
主时钟/晶体标称频率：	16 MHz	认证状态：	Not Qualified
座面最大高度：	2.794 mm	子类别：	Clock Generators
最大压摆率：	180 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：	CMOS
温度等级：	COMMERCIAL	端子面层：	Tin/Lead (Sn85Pb15)
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：	20
宽度：	7.5 mm	uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, PROCESSOR SPECIFIC
Base Number Matches：	1

9248DF-39 数据手册

Integrated

Circuit

Systems, Inc.

ICS9248-39

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 interface allows changing

functions, stop clock programing 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 20pF

loads while maintaining 50±5% duty cycle. The REF 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

Pentium is a trademark of Intel Corporation

I²C is a trademark of Philips Corporation

ICS reserves the right to make changes in the device data identified in

this publication without further notice. ICS advises its customers to

obtain the latest version of all device data to verify that any

9248-39RevF12/16/99

information being relied upon by the customer is current and accurate.

12 3 4 5 6 7...18

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9248DF-39 替代型号

型号	品牌	替代类型	描述	数据表
9248DF-39LF	IDT	功能相似	SSOP-48, Tube
ICS9248DF-39LF	IDT	功能相似	Processor Specific Clock Generator, 150MHz, PDSO48, 0.300 INCH, GREEN, SSOP-48

与9248DF-39相关器件

型号	品牌	获取价格	描述	数据表
9248DF-39LF	IDT	获取价格	SSOP-48, Tube
9248F-153-T	IDT	获取价格	Clock Generator
9248YF-185LFT	IDT	获取价格	Processor Specific Clock Generator, 133.33MHz, PDSO28, 0.209 INCH, ROHS COMPLIANT, SSOP-28
9248YF-195LF-T	IDT	获取价格	Processor Specific Clock Generator, 140MHz, PDSO48, 0.300 INCH, LEAD FREE, MO-118, SSOP-48
9248YF-50-T	ICSI	获取价格	Frequency Timing Generator for Pentium II Systems
9248YG-162-T	IDT	获取价格	Processor Specific Clock Generator, 137MHz, CMOS, PDSO48, 6.10 MM, 0.50 MM PITCH, MO-153,
9248YG-171-T	IDT	获取价格	Processor Specific Clock Generator, 133.33MHz, CMOS, PDSO48, 6.10 MM, 0.50 MM PITCH, TSSOP
9248YG-185LFT	IDT	获取价格	Processor Specific Clock Generator, 133.33MHz, PDSO28, 4.40 MM, 0.65 MM PITCH, ROHS COMPLI
9248YG-50	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO28, 6.10 MM, TSSOP-28
9248YG-56-T	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO28, 4.40 MM, 0.65 MM PITCH, TSSOP-28

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