ICS8521BYI 查看數據表（PDF） - Integrated Circuit Systems

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ICS8521BYI

DIFFERENTIAL -TO-LVPECL/ECL MULTIPLEXER

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

PRELIMINARY

ICS8521I

LOW SKEW, 1-TO-9

DIFFERENTIAL-TO-HSTL FANOUT BUFFER

GENERAL DESCRIPTION

The ICS8521I is a low skew, 1-to-9 Differential-

ICS

to-HSTL Fanout Buffer and a member of the

HiPerClockS™ HiPerClockS™family of High Performance Clock

Solutions from ICS. The ICS8521I has two se-

lectable 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

pulses on the outputs during asynchronous assertion/

deassertion of the clock enable pin.

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

voltage characteristics make the ICS8521I ideal for today’s

most advanced applications, such as IA64 and static RAMs.

FEATURES

• Nine HSTL outputs

• Selectable differential CLK, nCLK or LVPECL clock inputs

• CLK, nCLK pair can accept the following differential

input levels: LVPECL, LVDS, HSTL, SSTL, HCSL

• PCLK, nPCLK supports the following input types:

LVPECL, CML, SSTL

• Maximum output frequency: 500MHz

• Output skew: 25ps (typical)

• Part-to-part skew: 200ps (typical)

• Propagation delay: 1.3ns (typical)

•

V = 1.4V (maximum)

OH

• 3.3V core, 1.8V output operating supply voltages

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

• Available in both standard and lead-free RoHS

compliant packages

BLOCK DIAGRAM

PIN ASSIGNMENT

CLK_EN

CLK

nCLK

0

PCLK

nPCLK

1

CLK_SEL

D

Q

LE

32 31 30 29 28 27 26 25

Q0

VDD 1

nQ0

CLK 2

24 VDDO

23 Q3

Q1

nCLK 3

22 nQ3

nQ1

Q2

CLK_SEL 4

PCLK 5

ICS8521I

21 Q4

20 nQ4

nQ2

nPCLK 6

19 Q5

Q3

GND 7

nQ3

CLK_EN 8

18 nQ5

17 VDDO

Q4

9 1 0 1 1 1 2 1 3 1 4 1 5 16

nQ4

Q5

nQ5

Q6

32-Lead LQFP

nQ6

7mm x 7mm x 1.4mm package body

Q7

Y Package

nQ7

Top View

Q8

nQ8

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

product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.

8521BYI

www.icst.com/products/hiperclocks.html

REV. A NOVEMBER 17, 2005

1

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