IDT2308
3.3VZERODELAYCLOCKMULTIPLIER
COMMERCIALANDINDUSTRIALTEMPERATURERANGES
3.3V ZERO DELAY
CLOCK MULTIPLIER
IDT2308
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
The IDT2308 is a high-speed phase-lock loop (PLL) clock multiplier. It is
designedtoaddresshigh-speedclockdistributionandmultiplicationapplica-
tions.Thezerodelayisachievedbyaligningthephasebetweentheincoming
clockandtheoutputclock, operablewithintherangeof10to133MHz.
TheIDT2308hastwobanksoffouroutputseachthatarecontrolledviatwo
selectaddresses.Byproperselectionofinputaddresses,bothbankscanbe
put in tri-state mode. In test mode, the PLL is turned off, and the input clock
directlydrivestheoutputsforsystemtestingpurposes. Intheabsenceofan
inputclock,theIDT2308enterspowerdown,andtheoutputsaretri-stated.In
thismode, thedevicewilldrawlessthan25μA.
• Output Skew <200 ps
• Low jitter <200 ps cycle-to-cycle
• 1x, 2x, 4x output options (see table):
– IDT2308-1 1x
– IDT2308-2 1x, 2x
– IDT2308-3 2x, 4x
– IDT2308-4 2x
The IDT2308 is available in six unique configurations for both pre-
scaling and multiplication of the Input REF Clock. (See available options
table.)
– IDT2308-1H, -2H, and -5H for High Drive
• No external RC network required
• Operates at 3.3V VDD
ThePLLisclosedexternallytoprovidemoreflexibilitybyallowingtheuser
tocontrolthedelaybetweentheinputclockandtheoutputs.
TheIDT2308ischaracterizedforbothIndustrialandCommercialoperation.
• Available in SOIC and TSSOP packages
FUNCTIONALBLOCKDIAGRAM
(-3, -4)
16
2
FBK
REF
2
CLKA1
PLL
1
2
(-5)
3
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 AND INDUSTRIAL TEMPERATURE RANGES
MAY 2010
1
c
2010 Integrated Device Technology, Inc.
DSC 5173/12