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參數(shù)資料
| 型號： | ICS9250YF-PPP-T |
| 廠商： | INTEGRATED DEVICE TECHNOLOGY INC |
| 元件分類： | 時(shí)鐘產(chǎn)生/分配 |
| 英文描述： | 149.69 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO56 |
| 封裝： | 0.300 INCH, SSOP-56 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大小： | 410K |
| 代理商： | ICS9250YF-PPP-T |
Integrated
Circuit
Systems, Inc.
General Description
Features
ICS9250-14
Block Diagram
Pentium II is a trademark of Intel Corporation
I
2C is a trademark of Philips Corporation
Frequency Timing Generator for Pentium II Systems
9250-14 Rev A 2/5/00
Pin Configuration
Generates the following system clocks:
- 2 - CPUs @ 2.5V, up to 150MHz.
- 1 - IOAPIC @ 2.5V, PCI or PCI/2MHz.
-13 SDRAMs(3.3V)@150MHz.
-2-3V66@3.3V,2xPCIMHz.
- 8 - PCIs @ 3.3V.
- 1 - 48MHz, @ 3.3V fixed.
-2-REF@3.3V,14.318Hz.
- 1 - 24MHz, @ 3.3V fixed.
Supports spread spectrum modulation ,
± .25% center spread.
I2C support for power management
Efficient power management scheme through PD#
Uses external 14.138 MHz crystal
56-Pin 300 mil SSOP
The ICS9250-14 is a single chip clock for Intel Pentium II.
It provides all necessary clock signals for such a system.
Spread spectrum may be enabled through I2C programming.
Spread spectrum typically reduces EMI by 8dB to 10 dB.
This simplifies EMI qualification without resorting to board
design iterations or costly shielding. The ICS9250-14
employs a proprietary closed loop design, which tightly
controls the percentage of spreading over process and
temperature variations.
Power Groups
GNDREF,VDDREF=REF,Crystal
GND3V66,VDD3V66=3V66
GNDPCI,VDDPCI=PCICLKs
GNDCOR,VDDCOR=PLLCORE
GND48,VDD48=48
GNDSDR,VDDSDR=SDRAM
GNDLCPU,VDDLCPU=CPUCLK
GNDLPCI,VDDLAPIC=IOAPIC
1. These pins will have 2X drive strength.
* 120K ohm pull-up to VDD on indicated inputs.
Skew Specifications
CPU CPU: <175ps
SDRAM - SDRAM: < 250ps
3V663V66:<250ps
PCI PCI: <500ps
CPU-SDRAM<500ps
CPU(early)-PCI:MIN=1.0ns,TYP=2.0,MAX=4.0
CPU-3V66<500ps
3V66(early)-PCI:MIN=1.5ns,TYP=2.0,MAX=4.0
IOAPIC-PCI<500ps
PRODUCT PREVIEW documents contain information on new
products in the sampling or preproduction phase of development.
Characteristic data and other specifications are subject to change
without notice.
Preliminary Product Preview
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| ICS932S200BFLF | 功能描述:IC FREQ TIMING GENERATOR 56-SSOP RoHS:是 類別:集成電路 (IC) >> 時(shí)鐘/計(jì)時(shí) - 專用 系列:- 標(biāo)準(zhǔn)包裝:1,500 系列:- 類型:時(shí)鐘緩沖器/驅(qū)動器 PLL:是 主要目的:- 輸入:- 輸出:- 電路數(shù):- 比率 - 輸入:輸出:- 差分 - 輸入:輸出:- 頻率 - 最大:- 電源電壓:3.3V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:28-SSOP（0.209"，5.30mm 寬） 供應(yīng)商設(shè)備封裝:28-SSOP 包裝:帶卷 (TR) 其它名稱:93786AFT |
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