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IDT5V928

8OUTPUTCLOCKGENERATOR

INDUSTRIALTEMPERATURERANGE

FEBRUARY 2003

2003

Integrated Device Technology, Inc.

DSC

5854/5

c

IDT5V928

INDUSTRIAL TEMPERATURE RANGE

8 OUTPUT

CLOCK GENERATOR

FUNCTIONAL BLOCK DIAGRAM

DESCRIPTION:

The IDT5V928 is a low-cost, low skew, low jitter, and high-performance

clock synthesizer. It has been specially designed to interface with Gigabit

Ethernet (125MHz), Fibre CHannel (106.25MHz), and OC-3 (155.52MHz)

applications. It can be programmed to provide output frequencies ranging

from 50MHz to 160MHz, with input frequencies ranging from 6.25MHz to

80MHz.

The IDT5V928 includes an internal RC filter that provides excellent jitter

characteristics and eliminates the need for external components. When

using the optional crystal input, the chip accepts a 10 - 40MHz fundamental

mode crystal with a maximum equivalent series resistance of 50

Ω.

PH AS E

DE TE C TO R

CH A RGE

PU M P

LO OP

FILTE R

VC O

SE LE CT M O D E

S1

S0

OE

0

1

RE F

VCO DIVIDE

1/N

X2

X1

CRY STA L

OS CILLATO R

FEATURES:

• 3V to 3.6V operating voltage

• 50MHz to 160MHz output frequency range

• Input from fundamental crystal oscillator or external source

• Internal PLL feedback (loading feedback output relative to

other outputs, adjusts propagation delay between REF inputs

and outputs)

3, 4, 4.25, 5, 6, 6.25, and 8)

• Low jitter

• PLL bypass for testing and power-down control (S1 = H, S0 = H,

powers part down <500

µµµµµA)

• Available in TSSOP package

APPLICATIONS:

• Gigabit ethernet

• Router

• Network switches

• SAN

• Instrumentation

• Fibre channel

The IDT logo is a registered trademark of Integrated Device Technology, Inc.