ICS8535-31 datasheet(1/14 Pages) ICST

Part #	ICS8535-31

Description	LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/ LVCMOS-TO-3.3V LVPECL FANOUT BUFFER

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Manufacturer	ICST [Integrated Circuit Systems]

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8535AG-31

www.icst.com/products/hiperclocks.html

REV. B APRIL 29, 2005

1

Integrated

Circuit

Systems, Inc.

ICS8535-31

LOW SKEW, 1-TO-4, CRYSTAL OSCILLATOR/

LVCMOS-TO-3.3V LVPECL FANOUT BUFFER

GENERAL DESCRIPTION

The ICS8535-31 is a low skew, high performance

1-to-4 3.3V Crystal Oscillator/LVCMOS-to-3.3V

LVPECL fanout buffer and a member of the

HiPerClockS™family of High Performance Clock

Solutions from ICS. The ICS8535-31 has select-

able single ended clock or crystal inputs. The single ended

clock input accepts LVCMOS or LVTTL input levels and

translate them to 3.3V LVPECL levels. The output enable is

internally synchronized to eliminate runt pulses on the out-

puts during asynchronous assertion/deassertion of the clock

enable pin.

Guaranteed output and part-to-part skew characteristics

make the ICS8535-31 ideal for those applications demand-

ing well defined performance and repeatability.

FEATURES

• 4 differential 3.3V LVPECL outputs

• Selectable LVCMOS/LVTTL CLK or crystal inputs

• CLK can accept the following input levels: LVCMOS, LVTTL

• Maximum output frequency: 266MHz

• Output skew: 30ps (maximum)

• Part-to-part skew: 200ps (maximum)

• Propagation delay: 1.65ns (maximum)

• Additive phase jitter, RMS: 0.057ps (typical)

• 3.3V operating supply

• 0°C to 70°C ambient operating temperature

• Lead-Free package fully RoHS compliant

• Industrial Temperature information available upon request

• Replaces the ICS8535-11

BLOCK DIAGRAM

PIN ASSIGNMENT

ICS8535-31

20-Lead TSSOP

6.5mm x 4.4mm x 0.92mm package body

G Package

Top View

VEE

CLK_EN

CLK_SEL

CLK

nc

XTAL_IN

XTAL_OUT

nc

VCC

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

Q0

nQ0

VCC

Q1

nQ1

Q2

nQ2

VCC

Q3

nQ3

HiPerClockS™

ICS

CLK

Q0

nQ0

Q1

nQ1

Q2

nQ2

Q3

nQ3

CLK_EN

CLK_SEL

D

LE

Q

0

1

OSC

XTAL_IN

XTAL_OUT

Pullup

Pulldown

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ICS8535-31 Datasheet(PDF) 1 Page - Integrated Circuit Systems

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