ICS889831 datasheet(1/18 Pages) ICST

Part #	ICS889831

Description	LOW SKEW, 1-TO-4 DIFFERENTIAL LVPECL-TO-LVPECL/ECL FANOUT BUFFER

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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889831AK

www.icst.com/products/hiperclocks.html

REV. A JUNE 16, 2005

1

Integrated

Circuit

Systems, Inc.

ICS889831

LOW SKEW, 1-TO-4

DIFFERENTIAL LVPECL-TO-LVPECL/ECL FANOUT BUFFER

GENERAL DESCRIPTION

The ICS889831 is a high speed 1-to-4 Differential-

to-LVPECL/ECL Fanout Buffer and is a member

of the HiPerClockS™family of high performance

clock solutions from ICS. The ICS889831 is

optimized for high speed and very low output

skew, making it suitable for use in demanding applications

such as SONET, 1 Gigabit and 10 Gigabit Ethernet, and Fibre

Channel. The internally terminated differential input and

VREF_AC pin allow other differential signal families such as

LVDS, LVHSTL and CML to be easily interfaced to the input

with minimal use of external components. The device also has

an output enable pin which may be useful for system test

and debug purposes. The ICS889831 is packaged in a small

3mm x 3mm 16-pin VFQFN package which makes it ideal

for use in space-constrained applications.

FEATURES

• 4 differential LVPECL/ECL outputs

• IN, nIN pair can accept the following differential input levels:

LVPECL, LVDS, CML, SSTL

• 50Ω internal input termination to V

T

• Maximum output frequency: > 2.1GHz

• Output skew: 30ps (maximum)

• Part-to-part skew: 185ps (maximum)

• Additive phase jitter, RMS: 0.27ps (typical)

• Propagation delay: 570ps (maximum)

• LVPECL mode operating voltage supply range:

V

CC = 2.5V ± 5%, 3.3V ± 5%, VEE = 0V

• ECL mode operating voltage supply range:

V

CC = 0V, VEE = -3.3V ± 5%, 2.5V ± 5%

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

• Lead-Free package fully RoHS compliant

BLOCK DIAGRAM

PIN ASSIGNMENT

HiPerClockS™

ICS

IN

V

T

nIN

Q0

nQ0

Q1

nQ1

Q2

nQ2

Q3

nQ3

EN

D

Q

LE

V

REF_AC

ICS889831

16-Lead VFQFN

3mm x 3mm x 0.95 package body

K Package

Top View

Q1

nQ1

Q2

nQ2

IN

VT

VREF_AC

nIN

1

2

3

4

12

11

10

9

5

6

7

8

16 15 14 13

50

Ω

50

Ω

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