Datasheet > ICS87608I

ICS87608I

更新时间： 2024-09-29 22:55:27

品牌	Logo	应用领域
其他 - ETC		时钟发生器 PC
页数	文件大小	规格书
12页	153K
描述
LOW VOLTAGE/LOW SKEW, 1:8 PCI/PCI-X ZERO DELAY CLOCK GENERATOR

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ICS87608I 数据手册

ICS87608I

LOW VOLTAGE/LOW SKEW, 1:8 PCI/PCI-X

ZERO DELAY CLOCK GENERATOR

Integrated

Circuit

Systems, Inc.

GENERAL DESCRIPTION

FEATURES

• Fully integrated PLL

The ICS87608I has a selectable REF_CLK or

ICS

crystal input. The REF_CLK input accepts

LVCMOS or LVTTL input levels. The ICS87608I

has a fully integrated PLL along with frequency

configurable clock and feedback outputs for

• 8 LVCMOS/LVTTL outputs, 15Ω typical output impedance

HiPerClockS™

• Selectable crystal oscillator interface or

LVCMOS/LVTTL REF_IN clock input

multiplying and regenerating clocks with “zero delay”.

• Maximum output frequency: 166.67MHz

• Maximum crystal input frequency: 38MHz

• Maximum REF_IN input frequency: 41.67MHz

The ICS87608I is a 1:8 PCI/PCI-X Clock Generator and a

member of the HiPerClockS^TMfamily of high performance clock

solutions from ICS.The ICS87608I has a selectable REF_CLK

or crystal input. The REF_CLK input accepts LVCMOS or

LVTTL input levels.The ICS87608I has a fully integrated PLL

along with frequency configurable clock and feedback outputs

for multiplying and regenerating clocks with “zero delay”.The

PLL’s VCO has an operating range of 250MHz-500MHz,

allowing this device to be used in a variety of general purpose

clocking applications. For PCI/PCI-X applications in particular,

the VCO frequency should be set to 400MHz. This can be

accomplished by supplying 33.33MHz, 25MHz, 20MHz, or

16.66MHz on the reference clock or crystal input and by

selecting ÷12, ÷16, ÷20, or ÷24, respectively as the feedback

divide value. The dividers on each of the two output banks

can then be independently configured to generate 33.33MHz

(÷12), 66.66MHz (÷6), 100MHz (÷4), or 133.33MHz (÷3).

• Individual banks with selectable output dividers for

generating 33.333MHz, 66.66MHz, 100MHz and

133.333MHz

• Separate feedback control for generating PCI / PCI-X

frequencies from a 16.66MHz or 20MHz crystal, or 25MHz

or 33.33MHz reference frequency

• VCO range: 200MHz to 500MHz

• Cycle-to-cycle jitter: 120ps (maximum), @ 3.3V

• Period jitter, RMS: 20ps (maximum)

• Output skew: 250ps (maximum)

• Bank skew: 60ps (maximum)

• Static phase offset: 160ps 160ps

• Voltage Supply Modes:

V_DD(core/inputs), V_DDA(analog supply for PLL),

V_DDOA(output bank A),

The ICS87608I is characterized to operate with its core supply

at 3.3V and each bank supply at 3.3V or 2.5V.The ICS87608I

is packaged in a small 7x7mm body LQFP, making it ideal for

use in space-constrained applications.

V_DDOB(output bank B, REF_OUT, FB_OUT)

V_DD/V_DDA/V_DDOA/V_DDOB

3.3/3.3/3.3/3.3

3.3/3.3/2.5/3.3

3.3/3.3/3.3/2.5

3.3/3.3/2.5/2.5

PIN ASSIGNMENT

• Lead-Free package fully RoHS compliant

• -40°C to 85°C ambient operating temperature

32 31 30 29 28 27 26 25

QA0

QA1

QB0

QB1

ICS87608I

GND

32-Lead LQFP

7mm x 7mm x 1.4mm

package body

QA2

QB2

QA3

QB3

V^DDOA

V^DDOB

REF_OUT

FB_OUT

Y package

TopView

DIV_SELA0

10 11 12 13 14 15 16

87608AYI

www.icst.com/products/hiperclocks.html

REV. B MARCH 11, 2005

12 3 4 5 6 7...12

中文翻译

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与ICS87608I相关器件

型号	品牌	获取价格	描述	数据表
ICS8761	ICSI	获取价格	LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR
ICS8761CY	ICSI	获取价格	LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR
ICS8761CYI	IDT	获取价格	Processor Specific Clock Generator, 166.67MHz, CMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, M
ICS8761CYILF	IDT	获取价格	Processor Specific Clock Generator, 166.67MHz, CMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, R
ICS8761CYILFT	IDT	获取价格	Processor Specific Clock Generator, 166.67MHz, CMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, R
ICS8761CYIT	IDT	获取价格	Processor Specific Clock Generator, 166.67MHz, CMOS, PQFP64, 10 X 10 MM, 1.40 MM HEIGHT, M
ICS8761CYLF	ICSI	获取价格	LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR
ICS8761CYLFT	ICSI	获取价格	LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR
ICS8761CYLN	ICSI	获取价格	LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR
ICS8761CYLNT	ICSI	获取价格	LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR

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