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COMMERCIALTEMPERATURERANGE

IDT23S08T

2.5V ZERO DELAY CLOCK MULTIPLIER

NOVEMBER 2003

2003

Integrated Device Technology, Inc.

DSC - 6510/4

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COMMERCIAL TEMPERATURE RANGE

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

FEATURES:

• Phase-Lock Loop Clock Distribution for Applications ranging

from 10MHz to 133MHz operating frequency

• Distributes one clock input to two banks of four outputs

• Separate output enable for each output bank

• External feedback (FBK) pin is used to synchronize the outputs

to the clock input

• Output Skew <200 ps

• Low jitter <200 ps cycle-to-cycle

• 1/2x, 1x, 2x, 4x output options (see table):

– IDT23S08T-1 1x

– IDT23S08T-2 1x, 2x

– IDT23S08T-3 2x, 4x

– IDT23S08T-4 2x

– IDT23S08T-5 1/2x

• No external RC network required

• Spread spectrum compatible

• Available in SOIC package

FUNCTIONAL BLOCK DIAGRAM

DESCRIPTION:

The IDT23S08T is a high-speed phase-lock loop (PLL) clock multiplier. It

isdesignedtoaddresshigh-speedclockdistributionandmultiplicationapplica-

tions.Thezerodelayisachievedbyaligningthephasebetweentheincoming

clock and the output clock, operable within the range of 10 to 133MHz.

TheIDT23S08Thastwobanksoffouroutputseachthatarecontrolledvia

twoselectaddresses.Byproperselectionofinputaddresses,bothbankscan

beputintri-statemode.Intestmode,thePLListurnedoff,andtheinputclock

directly drives the outputs for system testing purposes. In the absence of an

input clock, the IDT23S08T enters power down. In this mode, the device will

draw less than 12µA, and the outputs are tri-stated.

The IDT23S08T is available in six unique configurations for both pre-

scaling and multiplication of the Input REF Clock. (See available options

table.)

ThePLLisclosedexternallytoprovidemoreflexibilitybyallowingtheuser

tocontrolthedelaybetweentheinputclockandtheoutputs.

TheIDT23S08TischaracterizedforCommercialoperation.

IDT23S08T

ADVANCE

INFORMATION

2.5V ZERO DELAY CLOCK

MULTIPLIER, SPREAD

SPECTRUM COMPATIBLE

PLL

S1

2

14

15

3

CLKA1

CLKA2

CLKA3

CLKA4

6

10

11

CLKB1

CLKB2

CLKB3

CLKB4

9

FBK

16

(-3, -4)

2

Control

Logic

7

8

1

REF

S2

(-2, -3)

2

(-5)

2