ICS8521 datasheet(1/13 Pages) ICST

No. de pieza	ICS8521

Descripción Electrónicos	LOW SKEW, 1-TO-9 DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER

PDF	13 Pages

Scroll/Zoom	100%

Fabricante Electrónico	ICST [Integrated Circuit Systems]

Página de inicio	http://www.icst.com

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1 / 13 page

Integrated

Circuit

Systems, Inc.

ICS8521

LOW SKEW, 1-TO-9

DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER

8521BY

www.icst.com/products/hiperclocks.html

REV. B JULY 31, 2001

1

GENERAL DESCRIPTION

The ICS8521 is a low skew, 1-to-9 3.3V Differ-

ential-to-LVHSTL Fanout Buffer and a member of

the HiPerClockS™ family of High Performance

Clock Solutions from ICS. The ICS8521 has two

selectable clock inputs. The CLK, nCLK pair can

accept most standard differential input levels. The PCLK,

nPCLK pair can accept LVPECL, CML, or SSTL input levels.

The clock enable is internally synchronized to eliminate runt

pulseson the outputs during asynchronous assertion/

deassertion of the clock enable pin.

Guaranteed output skew, part-to-part skew and crossover

voltage characteristics make the ICS8521 ideal for today’s

most advanced applications, such as IA64 and static RAMs.

HiPerClockS™

,&6

FEATURES

• 9 LVHSTL outputs

• Selectable CLK, nCLK or LVPECL clock inputs

• CLK, nCLK pair can accept the following differential input

levels: LVDS, LVPECL, LVHSTL, SSTL, HCSL

• PCLK, nPCLK supports the following input types:

LVPECL, CML, SSTL

• Maximum output frequency up to 500MHz

• Output skew: 50ps (maximum)

• Part-to-part skew: 250ps (maximum)

• Propagation delay: 1.8ns (maximum)

• V

OH = 1.2V (maximum)

• 3.3V core, 1.8V output operating supply voltages

• 0°C to 70°C ambient operating temperature

• Industrial temperature information available upon request

BLOCK DIAGRAM

PIN ASSIGNMENT

32 3 1 3 0 29 28 2 7 2 6 25

9 10 1 1 12 13 14 1 5 16

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

VDDO

Q3

nQ3

Q4

nQ4

Q5

nQ5

VDDO

ICS8521

VDD

CLK

nCLK

CLK_SEL

PCLK

nPCLK

GND

CLK_EN

CLK

nCLK

PCLK

nPCLK

Q0

nQ0

Q1

nQ1

Q2

nQ2

Q3

nQ3

Q4

nQ4

Q5

nQ5

Q6

nQ6

Q7

nQ7

Q8

nQ8

D

Q

LE

CLK_EN

CLK_SEL

32-Lead LQFP

7mm x 7mm x 1.4mm Package Body

Y Package

Top View

0

1

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