IDT5T93GL02
INDUSTRIALTEMPERATURERANGE
2.5VLVDS1:2GLITCHLESSCLOCKBUFFERTERABUFFERII
2.5V LVDS 1:2 GLITCHLESS
IDT5T93GL02
CLOCK BUFFER
TERABUFFER™ II
DESCRIPTION:
FEATURES:
TheIDT5T93GL022.5Vdifferentialclockbufferisauser-selectablediffer-
• Guaranteed Low Skew < 50ps (max)
• Very low duty cycle distortion < 100ps (max)
• High speed propagation delay < 2.2ns (max)
• Up to 450MHz operation
entialinputtotwoLVDSoutputs. ThefanoutfromadifferentialinputtotwoLVDS
outputsreducesloadingontheprecedingdriverandprovidesanefficientclock
distributionnetwork. TheIDT5T93GL02canactasatranslatorfromadifferential
HSTL, eHSTL, LVEPECL (2.5V), LVPECL (3.3V), CML, or LVDS input to
LVDS outputs. A single-ended 3.3V / 2.5V LVTTL input can also be used to
translatetoLVDSoutputs. Theredundantinputcapabilityallowsforaglitchless
change-over from a primary clock source to a secondary clock source up to
450MHz. SelectableinputsarecontrolledbySEL. Duringtheswitchover,the
outputwilldisablelowforuptothreeclockcyclesofthepreviously-selectedinput
clock. The outputs will remain low for up to three clock cycles of the newly-
selectedclock,afterwhichtheoutputswillstartfromthenewly-selectedinput.
AFSELpinhasbeenimplementedtocontroltheswitchoverincaseswherea
clocksourceisabsentorisdriventoDClevelsbelowtheminimumspecifications.
The IDT5T93GL02 outputs can be asynchronously enabled/disabled.
Whendisabled,theoutputswilldrivetothevalueselectedbytheGLpin. Multiple
power and grounds reduce noise.
• Selectable inputs
• Hot insertable and over-voltage tolerant inputs
• 3.3V / 2.5V LVTTL, HSTL, eHSTL, LVEPECL (2.5V), LVPECL (3.3V),
CML, or LVDS input interface
• Selectable differential inputs to two LVDS outputs
• Power-down mode
• 2.5V VDD
• Available in TSSOP package
APPLICATIONS:
• Clock distribution
FUNCTIONALBLOCKDIAGRAM
GL
G
Q1
OUTPUT
CONTROL
Q1
PD
Q2
Q2
OUTPUT
CONTROL
A1
1
A1
A2
0
A2
SEL
FSEL
TheIDTlogoisaregisteredtrademarkofIntegratedDeviceTechnology,Inc.
INDUSTRIAL TEMPERATURE RANGE
JANUARY 2007
1
© 2007 Integrated Device Technology, Inc.
DSC 6759/6