Datasheet > 844202BK-245

844202BK-245

更新时间： 2024-11-05 06:40:11

品牌	Logo	应用领域
艾迪悌 - IDT		/
页数	文件大小	规格书
13页	270K
描述
Clock Generator

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中文翻译

获取价格

技术参数
数据手册

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844202BK-245 技术参数

生命周期：	Active	Reach Compliance Code：	compliant
风险等级：	5.8	Base Number Matches：	1

844202BK-245 数据手册

PRELIMINARY

CRYSTAL-TO-LVDS PCI EXPRESS™

CLOCK SYNTHESIZER W/SPREAD SPECTRUM

ICS844202-245

GENERAL DESCRIPTION

FEATURES

• Two LVDS outputs at 25MHz, 100MHz, 125MHz or 250MHz

The ICS844202-245 is a 2 output PCI Express™ clock

ICS

HiPerClockS™

synthesizer optimized to generate low jitter PCIe

reference clocks with or without spread spectrum

modulation and is a member of the HiPerClockS™

family of high performance clock solutions from IDT.

• Crystal oscillator interface, 25MHz, 18pF parallel resonant

crystal

• Supports the following output frequencies:

25MHz, 100MHz, 125MHz or 250MHz

Spread type and amount can be configured via the SSC control

pins. Using a 25MHz, 18pF parallel resonant crystal, the device

will generate LVDS clocks at either 25MHz, 100MHz, 125MHz or

250MHz. The ICS844202-245 uses a low jitter VCO that easily

meets PCI Express jitter requirements and is packaged in a

32-pin VFQFN package.

• VCO range: 240MHz - 700MHz

• Supports SSC downspread at 0.50% and -0.75%,

centerspread at 0.25% and no spread options

• Cycle-to-cycle jitter: 70ps (typical)

• Period jitter: 40ps (typical)

• Full 3.3V power supply mode

• 0°C to 70°C ambient operating temperature

• Available in both standard (RoHS 5) and lead-free (RoHS 6)

packages

PIN ASSIGNMENT

32 31 30 29 28 27 26 25

V^DD

VDD

ICS844202-245

32-Lead VFQFN

5mm x 5mm x 0.75mm

package body

GND

BLOCK DIAGRAM

V^DDO

K Package

Top View

SSC1

FSEL0

Pullup

GND

10 11 12 13 14 15 16

25MHz

0 0 PLL Bypass

nQ0

XTAL_IN

Phase

Detector

VCO

240-700MHz

0 1 ÷5

1 0 ÷4

1 1 ÷2

OSC

XTAL_OUT

nQ1

Feedback Divider

÷20

Pullup:Pullup

Spread Spectrum

Control

SSC[1:0]

Default = 100MHz

Pulldown:Pullup

FSEL[1:0]

The Preliminary Information presented herein represents a product in pre-production.The noted characteristics are based on initial product characterization

and/or qualification.Integrated DeviceTechnology, Incorporated (IDT) reserves the right to change any circuitry or specifications without notice.

IDT^™/ ICS^™LVDS PCI EXPRESS™ CLOCK SYNTHESIZER

ICS844202BK-245 REV. A JULY 9, 2007

12 3 4 5 6 7...13

中文翻译

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与844202BK-245相关器件

型号	品牌	获取价格	描述	数据表
844202BK-245LF	IDT	获取价格	Clock Generator, 5 X 5 MM, 0.75 MM HEIGHT, ROHS COMPLIANT, MO-220VHHD-2, VFQFN-32
844202BK-245LFT	IDT	获取价格	Clock Generator, 5 X 5 MM, 0.75 MM HEIGHT, ROHS COMPLIANT, MO-220VHHD-2, VFQFN-32
844202BK-245T	IDT	获取价格	Clock Generator
844204BK-245LF	IDT	获取价格	Clock Generator, 250MHz, 5 X 5 MM, 0.75 MM HEIGHT, ROHS COMPLIANT, MO-220VHHD-2, VFQFN-32
844204BK-245LFT	IDT	获取价格	Clock Generator, 250MHz, 5 X 5 MM, 0.75 MM HEIGHT, ROHS COMPLIANT, MO-220VHHD-2, VFQFN-32
8442060U1000	ETC	获取价格	22 AWG stranded (7x30) tinned copper conductors, PVC insulation, twisted pair, chrome PVC
8442060U500	ETC	获取价格	22 AWG stranded (7x30) tinned copper conductors, PVC insulation, twisted pair, chrome PVC
844244AGI-04	IDT	获取价格	暂无描述
844244AGI-04T	IDT	获取价格	Clock Generator, 170MHz, CMOS, PDSO16, 4.40 X 5.0 MM, 0.925 MM HEIGHT, MO-153, TSSOP-16
844246AG	IDT	获取价格	Clock Generator

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