IDT23S08T
2.5VZERODELAYCLOCKMULTIPLIER
COMMERCIALTEMPERATURERANGE
2.5V ZERO DELAY CLOCK
MULTIPLIER, SPREAD
SPECTRUM COMPATIBLE
IDT23S08T
ADVANCE
INFORMATION
FEATURES:
DESCRIPTION:
• 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
TheIDT23S08Tis ahigh-speedphase-lockloop(PLL)clockmultiplier.It
isdesignedtoaddresshigh-speedclockdistributionandmultiplicationapplica-
tions.Thezerodelayisachievedbyaligningthephasebetweentheincoming
clockandtheoutputclock,operablewithintherangeof10to133MHz.
TheIDT23S08Thastwobanksoffouroutputseachthatarecontrolledvia
twoselectaddresses.Byproperselectionofinputaddresses,bothbankscan
beputintri-statemode.Intestmode,thePLListurnedoff,andtheinputclock
directlydrives theoutputs forsystemtestingpurposes.Intheabsenceofan
inputclock,theIDT23S08Tenterspowerdown.Inthismode,thedevicewill
drawlessthan12µA,andtheoutputsaretri-stated.
• 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
The IDT23S08T is available in six unique configurations for both pre-
scaling and multiplication of the Input REF Clock. (See available options
table.)
– IDT23S08T-5 1/2x
• No external RC network required
• Operates at 2.5V VDD
ThePLLisclosedexternallytoprovidemoreflexibilitybyallowingtheuser
tocontrolthedelaybetweentheinputclockandtheoutputs.
TheIDT23S08TischaracterizedforCommercialoperation.
• Spread spectrum compatible
• Available in SOIC package
FUNCTIONALBLOCKDIAGRAM
(-3, -4)
16
2
FBK
REF
2
CLKA1
PLL
1
2
3
(-5)
CLKA2
14
CLKA3
15
CLKA4
8
9
S2
S1
Control
Logic
2
(-2, -3)
6
CLKB1
CLKB2
CLKB3
CLKB4
7
10
11
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
COMMERCIAL TEMPERATURE RANGE
MARCH 2006
1
c
2006 Integrated Device Technology, Inc.
DSC - 6510/6