ICS8523 datasheet(1/13 Pages) ICST

Il numero della parte	ICS8523

Spiegazioni elettronici	LOW SKEW, 1-TO-4 DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER

PDF	13 Pages

Scroll/Zoom	100%

Produttore elettronici	ICST [Integrated Circuit Systems]

Homepage	http://www.icst.com

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1 / 13 page

8523BG

www.icst.com/products/hiperclocks.html

REV. B JULY 31, 2001

1

Integrated

Circuit

Systems, Inc.

ICS8523

LOW SKEW, 1-TO-4

DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER

BLOCK DIAGRAM

PIN ASSIGNMENT

ICS8523

20-Lead TSSOP

6.5mm x 4.4mm x 0.92mm body package

G Package

Top View

GND

CLK_EN

CLK_SEL

CLK

nCLK

PCLK

nPCLK

nc

VDD

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

Q0

nQ0

VDDO

Q1

nQ1

Q2

nQ2

VDDO

Q3

nQ3

CLK

nCLK

PCLK

nPCLK

Q0

nQ0

Q1

nQ1

Q2

nQ2

Q3

nQ3

0

1

CLK_EN

CLK_SEL

D

Q

LE

GENERAL DESCRIPTION

The ICS8523 is a low skew, high perfor-

mance 1-to-4 Differential-to-LVHSTL fanout buffer

and a member of the HiPerClockS™ family of High

Performance Clock Solutions from ICS. The

ICS8523 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 pulses on the outputs during asynchronous

assertion/deassertion of the clock enable pin.

Guaranteed output and part-to-part skew characteristics

make the ICS8523 ideal for those applications demanding

well defined performance and repeatability.

FEATURES

• 4 differential 1.8V 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 650MHz

• Translates any single-ended input signal to 1.8V LVHSTL

levels with resistor bias on nCLK input

• Output skew: 30ps (maximum)

• Part-to-part skew: 150ps (maximum)

• Propagation delay: 1.6ns (maximum)

• 3.3V core, 1.8V output operating supply

• 0°C to 70°C ambient operating temperature

• Industrial temperature information available upon request

HiPerClockS™

,&6

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