ICST ICS85311AM, ICS85311AMT Datasheet
Integrated
Circuit
Systems, Inc.
ICS85311
Low Skew, 1-to-2
Differential-to-2.5V/3.3V ECL/LVPECL Fanout Buffer
GENERAL DESCRIPTION
,&6
HiPerClockS™
can accept most standard differential input levels.The
ICS85311 is characterized to operate from either a 2.5V
or a 3.3V power supply. Guaranteed output and partto-part skew characteristics make the ICS85311 ideal
for those clock distribution applications demanding well
defined performance and repeatability.
The ICS85311 is a low skew, high performance 1-to-2 Differential-to-2.5V/3.3V ECL/
LVPECL Fanout Buffer and a member of the
HiPerClockS™ family of High Performance
Clock Solutions from ICS. The CLK, nCLK pair
FEATURES
• 2 differential 2.5V/3.3V LVPECL / ECL outputs
• 1 CLK, nCLK input pair
• CLK, nCLK pair can accept the following differential input
levels: LVDS, L VPECL, L VHSTL, SSTL, HCSL
• Maximum output frequency up to 1GHz
• Translates any single ended input signal to 3.3V L VPECL
levels with resistor bias on nCLK input
• Output skew: 15ps (maximum)
• Part-to-part skew: 100ps (maximum)
• Propagation delay: 1.4ns (maximum)
• LVPECL mode operating voltage supply range:
= 2.375V to 3.465V , VEE = 0V
V
CC
• ECL mode operating voltage supply range:
VCC = 0V , VEE = -2.375V to -3.465V
• 0°C to 70°C ambient operating temperature
• Industrial temperature information available upon request
BLOCK DIAGRAM PIN ASSIGNMENT
CLK
nCLK
Q0
nQ0
Q1
nQ1
3.90mm x 4.90mm x 1.37mm package body
Q0
nQ0
Q1
nQ1
1
8
2
7
3
6
4
5
ICS85311
8-Lead SOIC
M Package
T op View
Vcc
CLK
nCLK
VEE
ICS85311AM www.icst.com/products/hiperclocks.html REV. A JUNE 29, 2001
1
Integrated
Circuit
Systems, Inc.
Differential-to-2.5V/3.3V ECL/LVPECL Fanout Buffer
TABLE 1. PIN DESCRIPTIONS
rebmuNemaNepyTnoitpircseD
2,10Qn,0QtuptuO.slevelecafretniLCEPVL.riaptuptuolaitnereffiD
4,31Qn,1QtuptuO.slevelecafretniLCEPVL.riaptuptuolaitnereffiD
5V
6KLCntupnIpulluP.tupnikcolclaitnereffidgnitrevnI
7KLCtupnInwodlluP.tupnikcolclaitnereffidgnitrevni-noN
8V
pulluP
:ETON
EE
CC
dna
nwodlluP
TABLE 2. PIN CHARACTERISTICS
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
C
NI
R
PULLUP
R
NWODLLUP
rewoP.dnuorgottcennoC.nipylppusevitageN
rewoP.V3.3rov5.2ottcennoC.nipylppusevitisoP
ecnaticapaCtupnIKLCn,KLC4Fp
rotsiseRpulluPtupnI 15KΩ
rotsiseRnwodlluPtupnI 15KΩ
ICS85311
Low Skew, 1-to-2
.seulavlacipytrof,scitsiretcarahCniP,2elbaTeeS.srotsisertupnilanretniotsrefer
ICS85311AM www.icst.com/products/hiperclocks.html REV. A JUNE 29, 2001
2
Integrated
Circuit
Systems, Inc.
ICS85311
Low Skew, 1-to-2
Differential-to-2.5V/3.3V ECL/LVPECL Fanout Buffer
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
Inputs, V
I
Outputs, V
Package Thermal Impedance, θ
Storage T emperature, T
CC
O
JA
STG
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings
are stress specifications only. Functional operation of product at these conditions or any conditions beyond those listed in
DC Characteristics
the
or
AC Characteristics
periods may affect product reliability .
4.6V
-0.5V to VCC + 0.5V
-0.5V to VCC + 0.5V
112°C/W
-65°C to 150°C
is not implied. Exposure to absolute maximum rating conditions for extended
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
CC
I
EE
egatloVylppuSevitisoP531.33.3564.3V
tnerruCylppuSrewoP 52Am
TABLE 3B. DIFFERENTIAL DC CHARACTERISTICS, V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
KLCV
I
HI
I
LI
V
PP
V
RMC
2,1ETON
tnerruChgiHtupnI
tnerruCwoLtupnI
KLCnV
KLCV
KLCnV
egatloVtupnIkaeP-ot-kaeP51.03.1V
;egatloVtupnIedoMnommoC
VsadenifedsiegatlovedomnommoC:1ETON
HI
TABLE 3C. POWER SUPPLY DC CHARACTERISTICS, V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
CC
I
EE
egatloVylppuSevitisoP573.25.2526.2V
tnerruCylppuSrewoP 52Am
= 3.3V±5%, TA = 0°C TO 70°C
CC
= 3.3V±5%, TA = 0°C TO 70°C
CC
V=
CC
NI
V=
CC
NI
CC
CC
V564.3=051Aµ
V564.3=5Aµ
V,V564.3=
V0=5-Aµ
NI
V,V564.3=
V0=051-Aµ
NI
.
= 2.5V±5%, TA = 0°C TO 70°C
CC
V
5.0+V
EE
VsiKLCn,KLCrofgatlovtupnimumixameht,snoitacilppadedneelgnisroF:2ETON
.V3.0+
58.0-V
CC
ICS85311AM www.icst.com/products/hiperclocks.html REV. A JUNE 29, 2001
3
Integrated
Circuit
Systems, Inc.
ICS85311
Low Skew, 1-to-2
Differential-to-2.5V/3.3V ECL/LVPECL Fanout Buffer
TABLE 3D. DIFFERENTIAL DC CHARACTERISTICS, V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
KLCV
I
HI
I
LI
V
PP
V
RMC
2,1ETON
TABLE 3E. LVPECL DC CHARACTERISTICS, V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
HO
V
LO
V
GNIWS
tnerruChgiHtupnI
tnerruCwoLtupnI
KLCnV
KLCV
KLCnV
egatloVtupnIkaeP-ot-kaeP51.03.1V
;egatloVtupnIedoMnommoC
CC
1ETON;egatloVhgiHtuptuOV
1ETON;egatloVwoLtuptuOV
gniwSegatloVtuptuOkaeP-ot-kaeP 56.09.0V
05htiwdetanimretstuptuO:1ETON Ω Vot
CC
VsadenifedsiegatlovedomnommoC:1ETON
= 2.5V±5%, TA = 0°C TO 70°C
CC
V=
CC
NI
V=
CC
NI
CC
CC
.
HI
V526.2=051Aµ
V526.2=5Aµ
V,V526.2=
V0=5-Aµ
NI
V,V526.2=
V0=051-Aµ
NI
V
5.0+V
EE
VsiKLCn,KLCrofgatlovtupnimumixameht,snoitacilppadedneelgnisroF:2ETON
= 3.3V±5%, VCC = 2.5V±5%, TA = 0°C TO 70°C
4.1-V
CC
0.2-V
CC
.V2-
58.0-V
CC
.V3.0+
0.1-V
CC
7.1-V
CC
TABLE 4F. AC CHARACTERISTICS, V
= 3.3V±5%, VCC = 2.5V±5%, TA = 0°C TO 70°C
CC
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
f
XAM
t
DP
t
)o(ks4,2ETON;wekStuptuO 51sp
t
)pp(ks4,3ETON;wekStraP-ot-traP 001sp
t
R
t
F
emiTesiRtuptuOzHM05@%08ot%02003007sp
emiTllaFtuptuOzHM05@%08ot%02003007sp
ycneuqerFtuptuOmumixaM 1zHG
1ETON;yaleDnoitagaporP IJ zHG19.04.1sn
cdoelcyCytuDtuptuO8425%
.esiwrehtodetonsselnuzHM005taderusaemsretemarapllA
.tniopgnissorctuptuolaitnereffidehtottniopgnissorctupnilaitnereffidehtmorfderusaeM:1ETON
.snoitidnocdaollauqehtiwdnaegatlovylppusemasehttastuptuoneewtebwekssadenifeD:2ETON
.stniopssorclaitnereffidtuptuoehttaderusaeM
segatlovylppusemasehttagnitareposecivedtnereffidnostuptuoneewtebwekssadenifeD:3ETON
derusaemerastuptuoeht,ecivedhcaenostupnifoepytemasehtgnisU.snoitidnocdaollauqehtiwdna
.stniopssorclaitnereffidehtta
.56dradnatSCEDEJhtiwecnadroccanidenifedsiretemarapsihT:4ETON
ICS85311AM www.icst.com/products/hiperclocks.html REV. A JUNE 29, 2001
4
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