ICST ICS85304AG-01, ICS85304AG-01T Datasheet
Integrated
Circuit
Systems, Inc.
ICS85304-01
LOW SKEW, 1-TO-5
DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
GENERAL DESCRIPTION
,&6
HiPerClockS™
puts. The CLK, nCLK pair can accept most standard differential input levels. The PCLK, nPCLK pair can accept LVPECL,
CML, or SSTL input levels. The clock enable is internally synchronized to eliminate runt clock pulses on the outputs during asynchronous assertion/deassertion of the clock enable
pin.
Guaranteed output and part-to-part skew characteristics
make the ICS85304-01 ideal for those applications
demanding well defined performance and repeatability.
The ICS85304-01 is a low skew, high performance 1-to-5 Differential-to-3.3V LVPECL fanout
buffer and a member of the HiPerClockS™ family
of High Performance Clock Solutions from ICS.
The ICS85304-01 has two selectable clock in-
FEATURES
• 5 differential 3.3V LVPECL outputs
• Selectable CLK, nCLK or LVPECL clock inputs
• CLK, nCLK pair can accept the following differential input
levels: L VDS, L VPECL, LVHSTL, SSTL, HCSL
• PCLK, nPCLK supports the following input types:
LVPECL, CML, SSTL
• Maximum output frequency up to 650MHz
• Translates any single-ended input signal to 3.3V L VPECL
levels with resistor bias on nCLK input
• Output skew: 35ps (maximum)
• Part-to-part skew: 150ps (maximum)
• Propagation delay: 2.1ns (maximum)
• 3.3V operating supply
• 0°C to 70°C ambient operating temperature
• Industrial temperature information available upon request
BLOCK DIAGRAM PIN ASSIGNMENT
CLK_EN
CLK
nCLK
PCLK
nPCLK
CLK_SEL
85304AG-01 www.icst.com/products/hiperclocks.html REV. B JULY 13, 2001
0
0
1
1
D
Q
LE
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
1
6.5mm x 4.4mm x 0.92mm Package Body
Q0
nQ0
Q1
nQ1
Q2
nQ2
Q3
nQ3
Q4
nQ4
ICS85304-01
20-Lead TSSOP
20
1
19
2
18
3
17
4
16
5
15
6
14
7
13
8
12
9
11
10
G Package
Top View
V
CC
CLK_EN
V
CC
nPCLK
PCLK
V
EE
nCLK
CLK
CLK_SEL
V
CC
Integrated
Circuit
Systems, Inc.
TABLE 1. PIN DESCRIPTIONS
rebmuNemaNepyTnoitpircseD
2,10Qn,0QtuptuO.slevelecafretniLCEPVL.riaptuptuolaitnereffiD
4,31Qn,1QtuptuO.slevelecafretniLCEPVL.riaptuptuolaitnereffiD
6,52Qn,2QtuptuO.slevelecafretniLCEPVL.riaptuptuolaitnereffiD
8,73Qn,3QtuptuO.slevelecafretniLCEPVL.riaptuptuolaitnereffiD
01,94Qn,4QtuptuO.slevelecafretniLCEPVL.riaptuptuolaitnereffiD
02,81,11V
21LES_KLCtupnInwodlluP
31KLCtupnInwodlluP.tupnikcolclaitnereffidgnitrevni-noN
41KLCntupnIpulluP.tupnikcolclaitnereffidgnitrevnI
51V
61KLCPtupnInwodlluP.tupnikcolcLCEPVLlaitnereffidgnitrevni-noN
71KLCPntupnIpulluP.tupnikcolcLCEPVLlaitnereffidgnitrevnI
91NE_KLCtupnIpulluP
pulluP
:ETON
CC
EE
dna
nwodlluP
rewoP.V3.3ottcennoC.snipylppusevitisoP
rewoP.dnuorgottcennoC.nipylppusevitageN
ICS85304-01
LOW SKEW, 1-TO-5
DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
.stupniKLCPn,KLCPstceles,HGIHnehW.tupnitceleskcolC
.stupniKLCn,KLCstceles,WOLnehW
.slevelecafretniSOMCVL/LTTVL
kcolcwollofstuptuokcolc,HGIHnehW.elbanekcolcgnizinorhcnyS
decroferastuptuoQn,woldecroferastuptuoQ,WOLnehW.tupni
.slevelecafretniSOMCVL/LTTVL.hgih
.seulavlacipytrof,scitsiretcarahCniP,2elbaTeeS.srotsisertupnilanretniotsrefer
TABLE 2. PIN CHARACTERISTICS
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
C
NI
R
PULLUP
R
NWODLLUP
KLCn,KLC4Fp
ecnaticapaCtupnI
rotsiseRpulluPtupnI 15KΩ
rotsiseRnwodlluPtupnI 15KΩ
KLCPn,KLCP4Fp
,NE_KLC
LES_KLC
4Fp
85304AG-01 www.icst.com/products/hiperclocks.html REV. B JULY 13, 2001
2
Integrated
Circuit
Systems, Inc.
TABLE 3A. CONTROL INPUT FUNCTION TABLE
stupnIstuptuO
NE_KLCLES_KLCecruoSdetceleS4Qurht0Q4Qnurht0Qn
00 KLCn,KLCWOL;delbasiDHGIH;delbasiD
01 KLCPn,KLCPWOL;delbasiDHGIH;delbasiD
10 KLCn,KLCdelbanEdelbanE
11 KLCPn,KLCPdelbanEdelbanE
.1erugiFninwohssa
.B3elbaTni
ICS85304-01
LOW SKEW, 1-TO-5
DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
egdekcolctupnignillafdnagnisiragniwollofdelbanerodelbasiderastuptuokcolceht,sehctiwsNE_KLCretfA
debircsedsastupniKLCPn,KLCPdnaKLCn,KLCehtfonoitcnufaerastuptuoehtfoetatseht,edomevitcaehtnI
nCLK, nPCLK
Disabled
CLK, PCLK
CLK_EN
nQ0 - nQ4
Q0 - Q4
TABLE 3B. CLOCK INPUT FUNCTION TABLE
stupnIstuptuO
KLCroKLCKLCPnroKLCPn4Qurht0Q4Qnurht0Qn
01WOLHGIHlaitnereffiDotlaitnereffiDgnitrevnInoN
10 HGIHWOLlaitnereffiDotlaitnereffiDgnitrevnInoN
01ETON;desaiBWOLHGIHlaitnereffiDotdednEelgniSgnitrevnInoN
11ETON;desaiBHGIHWOLlaitnereffiDotdednEelgniSgnitrevnInoN
1ETON;desaiB0HGIHWOLlaitnereffiDotdednEelgniSgnitrevnI
1ETON;desaiB1WOLHGIHlaitnereffiDotdednEelgniSgnitrevnI
.sleveldedneelgnistpeccaottupni
Enabled
FIGURE 1 - CLK_EN TIMING DIAGRAM
edoMtuptuOottupnIytiraloP
laitnereffidehtgniriwsessucsidhcihw,8erugiF,8egapnonoitcesnoitamrofnInoitacilppAehtotreferesaelP:1ETON
85304AG-01 www.icst.com/products/hiperclocks.html REV. B JULY 13, 2001
3
Integrated
Circuit
Systems, Inc.
ICS85304-01
LOW SKEW, 1-TO-5
DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
Inputs, V
I
Outputs, V
Package Thermal Impedance, θ
Storage T emperature, T
CCx
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 the
DC Characteristics
or
AC Characteristics
ods may affect product reliability.
4.6V
-0.5V to VCC + 0.5V
-0.5V to VCC + 0.5V
73.2°C/W (0lfpm)
-65°C to 150°C
is not implied. Exposure to absolute maximum rating conditions for extended peri-
TABLE 4A. POWER SUPPLY CHARACTERISTICS, V
=3.3V±5%, TA = 0°C TO 70°C
CC
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
CC
I
EE
egatloVylppuSrewoP531.33.3564.3V
tnerruCylppuSrewoP 55Am
TABLE 4B. LVCMOS / LVTTL CHARACTERISTICS, V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
HI
V
LI
I
HI
I
LI
egatloVhgiHtupnI
egatloVwoLtupnI
tnerruChgiHtupnI
tnerruCwoLtupnI
TABLE 4C. DIFFERENTIAL DC CHARACTERISTICS, V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
KLCnV
I
HI
I
LI
V
PP
V
RMC
2,1ETON
tnerruChgiHtupnI
KLCV
tnerruCwoLtupnI
KLCnV
KLCV
,NE_KLC
LES_KLC
,NE_KLC
LES_KLC
NE_KLCV
LES_KLCV
NE_KLCV
LES_KLCV
CC
egatloVtupnIkaeP-ot-kaeP 51.03.1V
;egatloVtupnIedoMnommoC
VsadenifedsiegatlovedomnommoC:2ETON
=3.3V±5%, TA = 0°C TO 70°C
CC
V=
NI
CC
V=
NI
CC
CC
CC
V564.3=5Aµ
V564.3=051Aµ
V,V564.3=
V0=051-Aµ
NI
V,V564.3=
V0=5-Aµ
NI
=3.3V±5%, TA = 0°C TO 70°C
V=
CC
NI
V=
CC
NI
CC
CC
V564.3=5Aµ
V564.3=051Aµ
V,V564.3=
V0=051-Aµ
NI
V,V564.3=
V0=5-Aµ
NI
.
2567.3V
3.0-8.0V
5.0V
VsiKLCn,KLCrofegatlovtupnimumixamehtsnoitacilppadedneelgnisroF:1ETON
CC
.V3.0+
58.0-V
CC
85304AG-01 www.icst.com/products/hiperclocks.html REV. B JULY 13, 2001
4
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