Page 1
PRELIMINARY
Integrated
Circuit
Systems, Inc.
GENERAL DESCRIPTION
,&6
HiPerClockS™
provides a low power, low noise, solution for distributing clock
signals over controlled impedances of 100Ω. The ICS8543
accepts any differential input level and translates it to 3.3V
L VDS output levels.
Guaranteed output and part-to-part skew characteristics
make the ICS8543 ideal for those applications demanding
well defined performance and repeatability .
The ICS8543 is a low skew, high performance
1-to-4 clock fanout buffer and a member of
the HiPerClockS™ family of High Performance
Clock Solutions from ICS. Utilizing Low Voltage
Differential Signaling (LVDS) the ICS8543
ICS8543
LOW SKEW, 1-TO-4
LVDS FANOUT BUFFER
FEATURES
• 4 L VDS outputs
• Designed to meet or exceed the requirements of ANSI
TIA/EIA-644
• Selectable differential HSTL or L VPECL clock inputs
• L VCMOS / L VTTL control inputs
• 3.3V operating supply
• 20 lead TSSOP
• 0°C to 70°C ambient operating temperature
BLOCK DIAGRAM PIN ASSIGNMENT
CLK_EN
HCLK
nHCLK
PCLK
nPCLK
CLK_SEL
OE
nD
Q
LE
0
1
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
VEE
CLK_EN
CLK_SEL
HCLK
nHCLK
PCLK
nPCLK
OE
VEE
VDD
20-Lead TSSOP
20
1
19
2
18
3
17
4
16
5
15
6
14
7
13
8
12
9
11
10
ICS8543
G Package
Top View
Q0
nQ0
VDD
Q1
nQ1
Q2
nQ2
VEE
Q3
nQ3
The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial
product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications without notice.
ICS8543BG www.icst.com/products/hiperclocks.html REV. C MAY 21, 2001
1
Page 2
PRELIMINAR Y
Integrated
Circuit
Systems, Inc.
TABLE 1. PIN DESCRIPTIONS
rebmuNemaNepyTnoitpircseD
31,9,1EEVrewoP.dnuorgottcennoC.dnuorgylppusrewoP
2NE_KLCtupnIpulluP
3LES_KLCtupnInwodlluP
4KLCHtupnInwodlluP.tupnikcolcLTSHlaitnereffidgnitrevni-noN
5KLCHntupnIpulluP.tupnikcolcLTSHlaitnereffidgnitrevnI
6KLCPtupnInwodlluP.tupnikcolcLCEPlaitnereffidgnitrevni-noN
7KLCPntupnIpulluP.tupnikcolcLCEPlaitnereffidgnitrevnI
8EOtupnIpulluP
81,01DDVrewoP.V3.3ottcennoC.nipylppusrewoP
21,113Q,3QntuptuO.slevelecafretniSDVL.stuptuokcolclaitnereffiD
51,412Q,2QntuptuO.slevelecafretniSDVL.stuptuokcolclaitnereffiD
71,611Q,1QntuptuO.slevelecafretniSDVL.stuptuokcolclaitnereffiD
02,910Q,0QntuptuO.slevelecafretniSDVL.stuptuokcolclaitnereffiD
ICS8543
LOW SKEW, 1-TO-4
L VDS FANOUT BUFFER
kcolcswollofstuptuokcolcHGIHnehW.elbanekcolcsuonorhcnyS
.hgihecroferastuptuoQn,wolecroferastuptuoQ,WOLnehW.tupni
.slevelecafretniLTTVL/SOMCVL
.stupniLCEPlaitnereffidstcelesHGIHnehW.tupnitceleskcolC
.stupniLTSHlaitnereffidstcelesWOLnehW
.slevelecafretniLTTVL/SOMCVL
0Qn,0QstuptuofognilbasiddnagnilbaneslortnoC.elbanetuptuO
3Qn,3Qurht
TABLE 2. PIN CHARACTERISTICS
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
NICecnaticapaCtupnI
PULLUPRrotsiseRpulluPtupnI 15KΩ
NWODLLUPRrotsiseRnwodlluPtupnI 15KΩ
KLCHn,KLCH4Fp
KCLPn,KLCP4Fp
,NE_KLC
LES_KLC
4Fp
ICS8543BG www.icst.com/products/hiperclocks.html REV. C MAY 21, 2001
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Page 3
PRELIMINARY
Integrated
Circuit
Systems, Inc.
TABLE 3A. CONTROL INPUTS FUNCTION TABLE
stupnIstuptuO
EONE_KLCLES_KLC3Qurht1Q3Qnurht1Qn
0XX ZiHZiH
100 woLhgiH
10 1 woLhgiH
110 EVITCAEVITCA
111 EVITCAEVITCA
.B3elbaT
TABLE 3B. CLOCK INPUTS FUNCTION TABLE
stupnIstuptuO
KLCP,KLCHKLCPn,KLCHn3Qurht0Q3Qnurht0Qn
01 WOLHGIHlaitnereffiDotlaitnereffiDgnitrevnInoN
10 HGIHWOLlaitnereffiDotlaitnereffiDgnitrevnInoN
01ETON;desaiBWOLHGIHlaitnereffiDotdednEelgniSgnitrevnInoN
11ETON;desaiBHGIHWOLlaitnereffiDotdednEelgniSgnitrevnInoN
1ETON;desaiB0HGIHWOLlaitnereffiDotdednEelgniSgnitrevnI
1ETON;desaiB1WOLHGIHlaitnereffiDotdednEelgniSgnitrevnI
.Vm003±2/CCVyletamixorppa
ICS8543
LOW SKEW, 1-TO-4
LVDS FANOUT BUFFER
nidebircsedsastupniKLCPn,KLCPdnaKLCHn,KLCHehtfonoitcnufasituptuoehtfoetatsehtedomevitcaehtnI
edoMtuptuOottupnIytiraloP
ehtstestupnidesaibehttaegatlovehT.desaibebstupnilaitnereffidehtfoenotahtseriuqeresudedneelgniS:1ETON
otrotsiserasikrowtensaibtupnidednemmocerehtslevelLTTVLdnaSOMCVLroF.tupnidedneelgnisehtroftniophctiws
1.0adnadnuorgoteulavlauqeforotsisera,CCV µ sitniophctiwsgnitluserehT.dnuorgottupniehtmorfroticapacF
ICS8543BG www.icst.com/products/hiperclocks.html REV. C MAY 21, 2001
3
Page 4
PRELIMINAR Y
Integrated
Circuit
Systems, Inc.
LOW SKEW, 1-TO-4
ICS8543
L VDS FANOUT BUFFER
ABSOLUTE MAXIMUM RATINGS
Supply Voltage 4.6V
Inputs -0.5V to VDD + 0.5V
Outputs -0.5V to VDD + 0.5V
Ambient Operating T emperature 0°C to 70°C
Storage T emperature -65°C to 150°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These
ratings are stress specifications only and functional operation of product at these condition or any conditions beyond
those listed in the DC
for extended periods may affect product reliability .
TABLE 4A. POWER SUPPLY DC CHARACTERISTICS, VDD = 3.3V±5%, TA=0°C TO 70°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
DDVegatloVylppuSrewoP531.33.3564.3V
EEItnerruCylppuSrewoP 05Am
Characteristics
or
AC Characteristics
is not implied. Exposure to absolute maximum rating conditions
TABLE 4B. LVPECL DC CHARACTERISTICS, VDD = 3.3V±5%, TA=0°C TO 70°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
HIItnerruChgiHtupnI
LIItnerruCwoLtupnI
PPVegatloVtupnIkaeP-ot-kaeP 51.03.1V
RMCV1ETON;egatloVtupnIedoMnommoC 5.13.3V
KLCP 051Aµ
KLCPn 5Aµ
KLCP5-Aµ
KLCPn051-Aµ
.HIVmuminimehtsadenifedsiLCEPVLrofegatlovedomnommoC:1ETON
TABLE 4C. LVHSTL DC CHARACTERISTICS, VDD = 3.3V±5%, TA=0°C TO 70°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
HIItnerruChgiHtupnI
LIItnerruCwoLtupnI
PPVegatloVtupnIkaeP-ot-kaeP 51.03.1V
RMCV1ETON;egatloVtupnIedoMnommoC 5.058.0-DDVV
.stupniLTSS
KLCHV531.3 ≤ IDDV ≤ V564.3051Aµ
KLCHnV531.3 ≤ IDDV ≤ V564.35Aµ
KLCHV531.3 ≤ IDDV ≤ V564.35-Aµ
KLCHnV531.3 ≤ IDDV ≤ V564.3051-Aµ
dnaSDVL,MCDhtiwelbitapmocsiRMCV.egatlovrevossorcehtsadenifedsiLTSHrofegatlovedomnommoC:1ETON
ICS8543BG www.icst.com/products/hiperclocks.html REV. C MAY 21, 2001
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Page 5
PRELIMINARY
Integrated
Circuit
Systems, Inc.
LOW SKEW, 1-TO-4
ICS8543
LVDS FANOUT BUFFER
TABLE 4D. LVCMOS / LVTTL DC CHARACTERISTICS, VDD = 3.3V±5%, TA=0°C TO 70°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
HIVegatloVhgiHtupnIEO,LES_KLC,NE_KLC2V
LIVegatloVwoLtupnIEO,LES_KLC,NE_KLC 8.0V
HIItnerruChgiHtupnI
LIItnerruCwoLtupnI
TABLE 4E. LVDS DC CHARACTERISTICS, VDD = 3.3V±5%, TA=0°C TO 70°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
DOVegatloVtuptuOlaitnereffiD052053054Vm
∆ DOV
SOVegatloVtesffO521.152.1573.1V
∆ SOV
ZOItnerruCegakaeLecnadepmIhgiH01-1±01+Aµ
FFOIegakaeLffOrewoP02-1±02+Aµ
DSOItnerruCtiucriCtrohStuptuOlaitnereffiD 0.3Am
SOItnerruCtiucriCtrohStuptuO 0.3Am
EO,NE_KLC 5Aµ
LES_KLC 051Aµ
EO,NE_KLC051-Aµ
LES_KLC5-Aµ
egnahCedutingaMDOV 453Vm
egnahCedutingaMSOV 552Vm
TABLE 5. AC CHARACTERISTICS, VDD = 3.3V±5%, TA=0°C TO 70°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
XAMfycneuqerFtupnImumixaM 056zHM
HLpthgiH-ot-woL,yaleDnoitagaporP0≤ f ≤ zHM0568.14.2sn
)o(kst2ETON;wekStuptuO 05sp
)pp(kst3ETON;wekStraP-ot-traP 003sp
RtemiTesiRtuptuOR
FtemiTllaFtuptuOR
WPthtdiWesluPtuptuODBT-2/ELCYCtDBT+2/ELCYCtsn
NEtemiTelbanEtuptuO DBTsn
SIDtemiTelbasiDtuptuO DBTsn
001= Ω 002004006sp
L
001= Ω 002004006sp
L
.esiwrehtodetonsselnuXAMftaderusaemsretemarapllA:1ETON
.snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastuptuossorcawekssadenifeD:2ETON
.tniopgnissorctuptuolaitnereffidehtottupniehtfotniop%05ehtmorfderusaeM
segatlovylppusemasehttagnitareposecivedtnereffidnostuptuotnereffidtawekssadenifeD:3ETON
.tniopgnissorctuptuolaitnereffidehtotstupniekilfo%05morfderusaeM.snoitidnocdaollauqehtiwdna
ICS8543BG www.icst.com/products/hiperclocks.html REV. C MAY 21, 2001
5
Page 6
PRELIMINAR Y
Integrated
Circuit
Systems, Inc.
PACKAGE OUTLINE - G SUFFIX
ICS8543
LOW SKEW, 1-TO-4
L VDS FANOUT BUFFER
N
1120
1
A2
e
10
D
b
c
L
E
E1
α
A
-C-
A1
SEATING
PLANE
aaa
C
TABLE 6. PACKAGE DIMENSIONS
LOBMYS
N02
A--02.1--740.0
1A50.051.0200.0600.0
2A08.050.1230.0140.0
b91.003.0700.0210.0
c90.002.05300.0800.0
D04.606.6252.0062.0
ECISAB04.6CISAB252.0
1E03.405.4961.0771.0
eCISAB56.0CISAB6520.0
L54.057.0810.0030.0
α
aaa--01.0--400.0
Reference Document: JEDEC Publication 95, MO-153
ICS8543BG www.icst.com/products/hiperclocks.html REV. C MAY 21, 2001
NIMXAMNIMXAM
°0 °8 °0 °8
sretemilliMsehcnI
6
Page 7
PRELIMINARY
Integrated
Circuit
Systems, Inc.
TABLE 7. ORDERING INFORMATION
rebmuNredrO/traPgnikraMegakcaPtnuoCerutarepmeT
GB3458SCIGB3458SCIPOSSTdael02ebutrep27C°07otC°0
TGB3458SCIGB3458SCIleeRdnaepaTnoPOSSTdael020052C°07otC°0
ICS8543
LOW SKEW, 1-TO-4
LVDS FANOUT BUFFER
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems, Incorporated (ICS) assumes no responsibility for either its use
or for infringement of any patents or other rights of third parties, which would result from its use. No other circuits, patents, or licenses are implied. This product is intended for use
in normal commercial applications. Any other applications such as those requiring extended temperature range, high reliability, or other extraordinary environmental requirements are
not recommended without additional processing by ICS. ICS reserves the right to change any circuitry or specifications without notice. ICS does not authorize or warrant any ICS
product for use in life support devices or critical medical instruments.
ICS8543BG www.icst.com/products/hiperclocks.html REV. C MAY 21, 2001
7
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