ICS87608AYILF datasheet(1/12 Pages) ETC

номер детали	ICS87608AYILF

подробное описание детали	LOW VOLTAGE/LOW SKEW, 1:8 PCI/PCI-X ZERO DELAY CLOCK GENERATOR

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87608AYI

www.icst.com/products/hiperclocks.html

REV. B MARCH 11, 2005

1

Integrated

Circuit

Systems, Inc.

ICS87608I

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

ZERO DELAY CLOCK GENERATOR

GENERAL DESCRIPTION

The ICS87608I has a selectable REF_CLK or

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

member of the HiPerClockSTM family 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).

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.

FEATURES

• Fully integrated PLL

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

• Selectable crystal oscillator interface or

LVCMOS/LVTTL REF_IN clock input

• Maximum output frequency: 166.67MHz

• Maximum crystal input frequency: 38MHz

• Maximum REF_IN input frequency: 41.67MHz

• 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), VDDA (analog supply for PLL),

V

DDOA (output bank A),

V

DDOB (output bank B, REF_OUT, FB_OUT)

V

DD/VDDA/VDDOA/VDDOB

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

• Lead-Free package fully RoHS compliant

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

HiPerClockS™

ICS

PIN ASSIGNMENT

32 31 30 29 28 27 26 25

9

10 11 12 13 14 15 16

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

QB0

QB1

GND

QB2

QB3

VDDOB

REF_OUT

FB_OUT

QA0

QA1

GND

QA2

QA3

VDDOA

MR

DIV_SELA0

ICS87608I

32-Lead LQFP

7mm x 7mm x 1.4mm

package body

Y package

Top View

Аналогичный номер детали - ICS87608AYILF

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Integrated Circuit Syst...	ICS8761	200Kb / 15P	LOW VOLTAGE, LOW SKEW, PCI / PCI-X CLOCK GENERATOR REV. C SEPTEMBER 7, 2004
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Аналогичное описание - ICS87608AYILF

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Integrated Circuit Syst...	ICS9112-27	230Kb / 8P	Low Skew PCI / PCI-X Buffer Rev B 02/27/01
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Аналогичный номер детали - ICS87608AYILF

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