8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
1
Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
GENERAL DESCRIPTION
The ICS8701I is a low skew , ÷1, ÷2 Clock Gen-
erator and a member of the HiPerClockS™
family of High Performance Clock Solutions
from ICS. The low impedance LVCMOS out-
puts are designed to drive 50
W
series or par-
allel terminated transmission lines. The ef fective fanout can
be increased from 20 to 40 by utilizing the ability of the
outputs to drive two series terminated lines.
The divide select inputs, DIV_SELx, control the output fre-
quency of each bank. The outputs can be utilized in the ÷1,
÷2 or a combination of ÷1 and ÷2 modes. The bank enable
inputs, BANK_EN0:1, support enabling and disabling each
bank of outputs individually. The master reset input, nMR/
OE, resets the internal frequency dividers and also con-
trols the active and high impedance states of all outputs.
The ICS8701I is characterized at 3.3V and mixed 3.3V in-
put supply, and 2.5V output supply operating modes. Guar-
anteed bank, output and part-to-part skew characteristics
make the ICS8701I ideal for those clock distribution appli-
cations demanding well defined performance and repeat-
ability.
FEATURES
• 20 LVCMOS outputs, 7
W
typical output impedance
• Output frequency up to 250MHz
• 200ps bank skew, 250ps output skew, 300ps multiple
frequency skew, 600ps part-to-part skew
• LVCMOS / LVTTL clock input
• LVCMOS control inputs
• Bank enable logic allows unused banks to be disabled
in reduced fanout applications
• 3.3V or mixed 3.3V input, 2.5V output operating
supply modes
• 48 lead low-profile QFP (LQFP), 7mm x 7mm x 1.4mm
package body, 0.5mm package lead pitch
• -40°C to 85°C ambient operating temperature
• Other divide values available on request
BLOCK DIAGRAM PIN ASSIGNMENT
DIV_SELA
DIV_SELB
DIV_SELC
DIV_SELD
nMR/OE
BANK_EN0
BANK_EN1
QAO - QA4
QB0 - QB4
QC0 - QC4
QD0 - QD4
LVCMOS_CLK
48 47 46 45 44 43 42 41 40 39 38 37
13 14 15 16 17 18 19 20 21 22 23
24
1
2
3
4
5
6
7
8
9
10
11
12
36
35
34
33
32
31
30
29
28
27
26
25
QC3
VDDO
QC4
QD0
VDDO
QD1
GND
QD2
GND
QD3
VDDO
QD4
QB1
VDDO
QB0
QA4
VDDO
QA3
GND
QA2
GND
QA1
VDDO
QA0
DIV_SELA
DIV_SELB
LVCMOS_CLK
GND
VDDI
BANK_EN0
GND
BANK_EN1
VDDI
nMR/OE
DIV_SELC
DIV_SELD
GND
QB2
GND
QB3
VDDO
QB4
QC0
VDDO
QC1
GND
QC2
GND
48-Pin LQFP
Y Package
Top View
ICS8701I
HiPerClockS™
,&6
1
0
¸
1
¸
2
1
0
1
0
1
0
Bank Enable
Logic
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
2
Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
TABLE 1. PIN DESCRIPTIONS
rebmuNemaNepyTnoitpircseD
,5,2 ,62,11 ,53,23 44,14
ODDVrewoP.V5.2roV3.3ottcennoC.ylppusrewoptuptuO
,81,9,7 ,03,82,12 ,64,93,73 84
DNGrewoP.dnuorgottcennoC.dnuorG
02,61IDDVrewoP.V3.3ottcennoC.ylppusrewoptupnI
,72,52 ,92 33,13
,1AQ,0AQ ,2AQ 4AQ,3AQ tuptuO .slevelecafretniSOMCVL.stuptuoAknaB
7
W
.ecnadepmituptuolacipyt
,63,43 ,83 24,04
,1BQ,0BQ ,2BQ 4BQ,3BQ tuptuO .slevelecafretniSOMCVL.stuptuoBknaB
7
W
.ecnadepmituptuolacipyt
,54,34 ,74 3,1
,1CQ,0CQ ,2CQ 4CQ,3CQ tuptuO .slevelecafretniSOMCVL.stuptuoCknaB
7
W
.ecnadepmituptuolacipyt
,6,4 ,8 21,01
,1DQ,0DQ ,2DQ 4DQ,3DQ tuptuO slevelecafretniSOMCVL.stuptuoDknaB
7
W
.ecnadepmituptuolacipyt
22KLC_SOMCVLtupnInwodlluP.slevelecafretniSOMCVL.tupnikcolC
31DLES_VIDtupnIpulluP .stuptuoDknabrofnoisividycneuqerfslortnoC .slevelecafretniSOMCVL
41CLES_VIDtupnIpulluP .stuptuoCknabrofnoisividycneuqerfslortnoC .slevelecafretniSOMCVL
32BLES_VIDtupnIpulluP .stuptuoBknabrofnoisividycneuqerfslortnoC .slevelecafretniSOMCVL
42ALES_VIDtupnIpulluP .stuptuoAknabrofnoisividycneuqerfslortnoC .slevelecafretniSOMCVL
91,71 ,1NE_KNAB 0NE_KNAB tupnIpulluP .slevelecafretniSOMCVL.sknabybstuptuoselbasiddnaselbanE
51EO/RMntupnIpulluP .stuptuollaselbasiddnaselbanE.elbanetuptuodnateserretsaM .slevelecafretniSOMCVL
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
3
Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
TABLE 2. PIN CHARACTERISTICS
TABLE 3. FUNCTION TABLE
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
NIC tupnI ecnaticapaC
KLC_SOMCVL Fp
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,EO/RMN,0NE_KNAB ,1NE_KNAB
PULLUPRrotsiseRpulluPtupnI 15K
W
NWODLLUPRrotsiseRnwodlluPtupnI 15K
W
DPCecnaticapaCnoitapissiDrewoP )tuptuorep(
=ODDV,IDDV V564.3 Fp
,V564.3=IDDV V526.2=ODDV Fp
TUORecnadepmItuptuO 7
W
stupnIstuptuO
EO/RMn1NE_KNAB0NE_KNABxLES_VID4AQ-0AQ4BQ-0BQ4CQ-0CQ4DQ-0DQ xQ ycneuqerf
0X XX ZiHZiHZiHZiHorez
10 0 0 evitcAZiHZiHZiH2/NIf
11 00 evitcAevitcAZiHZiH2/NIf
10 10 evitcAevitcAevitcAZiH2/NIf
11 10 evitcAevitcAevitcAevitcA2/NIf
10 0 1 evitcAZiHZiHZiHNIf
11 0 1 evitcAevitcAZiHZiHNIf
10 1 1 evitcAevitcAevitcAZiHNIf
11 11 evitcAevitcAevitcAevitcANIf
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
4
Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
ABSOLUTE MAXIMUM RATINGS
Supply Voltage 4.6V
Inputs -0.5V to VDD + 0.5V
Outputs -0.5V to VDDO + 0.5V
Ambient Operating Temperature -40°C to 85°C
Storage Temperature -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 Characteristics
or
AC Characteristics
is not implied. Exposure to absolute maximum rating condi-
tions for extended periods may affect product reliability.
TABLE 4A. POWER SUPPLY DC CHARACTERISTICS, VDDI=VDDO=3.3V±5%, TA=-40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
HIV tupnI egatloVhgiH
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V564.3=IDDV28.3V
KLC_SOMCVLV564.3=IDDV28.3V
LIV tupnI egatloVwoL
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V564.3=IDDV3.0-8.0V
KLC_SOMCVLV564.3=IDDV3.0-3.1V
HII tupnI tnerruChgiH
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V564.3=NIV=IDDV5Aµ
KLC_SOMCVLV564.3=NIV=IDDV051Aµ
LII tupnI tnerruCwoL
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V0=NIV,V564.3=IDDV051-Aµ
KLC_SOMCVLV0=NIV,V564.3=IDDV5-Aµ
HOVegatloVhgiHtuptuO V531.3=ODDV=IDDV Am63-=HOI 6.2V
LOVegatloVwoLtuptuO V531.3=ODDV=IDDV Am63=LOI 5.0V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
IDDVegatloVylppuSrewoPtupnI 531.33.3564.3V
ODDVegatloVylppuSrewoPtuptuO 531.33.3564.3V
DDItnerruCylppuSrewoPtnecseiuQ V564.3=HIV=IDDV V0=LIV 001Am
TABLE 4B. LVCMOS DC CHARACTERISTICS, VDDI=VDDO=3.3V±5%, TA=-40°C TO 85°C
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
5
Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
TABLE 5A. AC CHARACTERISTICS, VDDI=VDDO=3.3V±5%, TA=-40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
XAMfycneuqerFtupnImumixaM 052zHM
HLpt ,yaleDnoitagaporP hgiH-ot-woL ZHM0
£
f
£
zHM0022.26.3sn
LHpt ,yaleDnoitagaporP woL-ot-hgiH ZHM0
£
f
£
zHM0022.26.3sn
)b(kst2ETON;wekSknaB2/ODDVtaegdegnisirnoderusaeM002sp
)o(kst3ETON;wekStuptuO2/ODDVtaegdegnisirnoderusaeM052sp
(kstw) ;wekSycneuqerFelpitluM 4ETON 2/ODDVtaegdegnisirnoderusaeM003sp
)pp(kst5ETON;wekStraPottraP2/ODDVtaegdegnisirnoderusaeM006sp
Rt6ETON;emiTesiRtuptuO%07ot%03002009sp
Ft6ETON;emiTllaFtuptuO%07ot%03002009sp
WPthtdiWesluPtuptuO ZHM0
£
f
£
zHM002 2/ELCYCt 6.0- 2/ELCYCt 2/ELCYCt 6.0+ sn
zHM002=f9.15.21.3sn
NEt ;emiTelbanEtuptuO 6ETON zHM01=f6sn
SIDt ;emiTelbasiDtuptuO 6ETON zHM01=f6sn
05htiwdetanimretstuptuollA.esiwrehtodetonsselnuzHM002taderusaemsretemarapllA:1ETON
W
.2/ODDVot .snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastuptuofoknabanihtiwwekssadenifeD:2ETON .snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastuptuofosknabssorcawekssadenifeD:3ETON segatlovylppusemasehthtiwycneuqerftnereffidtagnitarepostuptuofosknabssorcawekssadenifeD:4ETON .snoitidnocdaollauqedna dnasegatlovylppusemasehttagnitareposecivedtnereffidnostuptuotnereffidtaweksehtsadenifeD:5ETON .snoitidnocdaollauqehtiw .noitcudorpnidetsettoN.noitaziretcarahcybdeetnaraugerasretemarapesehT:6ETON
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
6
Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
TABLE 4C. POWER SUPPLY DC CHARACTERISTICS, VDDI=3.3V±5%, VDDO=2.5V±5%, TA=-40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
HIV tupnI egatloVhgiH
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V564.3=IDDV28.3V
KLC_SOMCVLV564.3=IDDV28.3V
LIV tupnI egatloVwoL
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V564.3=IDDV3.0-8.0V
KLC_SOMCVLV564.3=IDDV3.0-3.1V
HII tupnI tnerruChgiH
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V564.3=NIV5Aµ
KLC_SOMCVLV564.3=NIV051Aµ
LII tupnI tnerruCwoL
,BLES_VID,ALES_VID ,DLES_VID,CLES_VID ,0NE_KNAB EO/RMn,1NE_KNAB
V0=NIV051-Aµ
KLC_SOMCVLV0=NIV5-Aµ
HOVegatloVhgiHtuptuO ,V531.3=IDDV V573.2=ODDV Am72-=HOI 8.1V
LOVegatloVwoLtuptuO ,V531.3=IDDV V573.2=ODDV Am72=HOI 5.0V
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
IDDVegatloVylppuSrewoPtupnI 531.33.3564.3V
ODDVegatloVylppuSrewoPtuptuO 573.25.2526.2V
DDItnerruCylppuSrewoPtnecseiuQ V564.3=HIV=IDDV V0=LIV 001Am
TABLE 4B. LVCMOS DC CHARACTERISTICS, VDDI=3.3V±5%, VDDO=2.5V±5%, TA=-40°C TO 85°C
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
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Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
TABLE 5B. AC CHARACTERISTICS, VDDI=3.3V±5%, VDDO=2.5V±5%, TA=-40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
XAMfycneuqerFtupnImumixaM 052zHM
HLpt ,yaleDnoitagaporP hgiH-ot-woL ZHM0
£
f
£
zHM0024.27.3sn
LHpt ,yaleDnoitagaporP woL-ot-hgiH ZHM0
£
f
£
zHM0024.27.3sn
)b(kst2ETON;wekSknaB2/ODDVtaegdegnisirnoderusaeM522sp
)o(kst3ETON;wekStuptuO2/ODDVtaegdegnisirnoderusaeM052sp
(kstw) ;wekSycneuqerFelpitluM 4ETON 2/ODDVtaegdegnisirnoderusaeM003sp
)pp(kst5ETON;wekStraPottraP2/ODDVtaegdegnisirnoderusaeM056sp
Rt6ETON;emiTesiRtuptuO%07ot%03002009sp
Ft6ETON;emiTllaFtuptuO%07ot%03002009sp
WPthtdiWesluPtuptuO ZHM0
£
f
£
zHM002 2/ELCYCt 6.0- 2/ELCYCt 2/ELCYCt 6.0+ sn
zHM002=f9.15.21.3sn
NEt ;emiTelbanEtuptuO 6ETON zHM01=f6sn
SIDt ;emiTelbasiDtuptuO 6ETON zHM01=f6sn
05htiwdetanimretstuptuollA.esiwrehtodetonsselnuzHM002taderusaemsretemarapllA:1ETON
W
.2/ODDVot .snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastuptuofoknabanihtiwwekssadenifeD:2ETON .snoitidnocdaollauqehtiwdnasegatlovylppusemasehttastuptuofosknabssorcawekssadenifeD:3ETON segatlovylppusemasehthtiwycneuqerftnereffidtagnitarepostuptuofosknabssorcawekssadenifeD:4ETON .snoitidnocdaollauqedna dnasegatlovylppusemasehttagnitareposecivedtnereffidnostuptuotnereffidtaweksehtsadenifeD:5ETON .snoitidnocdaollauqehtiw .noitcudorpnidetsettoN.noitaziretcarahcybdeetnaraugerasretemarapesehT:6ETON
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
8
Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
FIGURE 1A, 1B - TIMING DIAGRAMS
nMR/OE
CLK
Qx, ÷1
Qx, ÷2
High Impedance Active
CLK
Qx, ÷1
Qx, ÷2
FIGURE 1A - ACTIVE, ÷1, ÷2
FIGURE 1B - RESET TO ACTIVE, ÷1, ÷2
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
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Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
FIGURE 2A, 2B - TIMING WAVEFORMS
VOH - 300mV
VOL + 300mV
tPHZ tPZH
tPLZ tPZL
FIGURE 2B - DISABLE AND ENABLE TIMES
fin = 10MHz, Vamp = 3.3V, tr = tf = 600ps
nMR/OE,
BANK_ENx
BANK_ENx
Q
Q
3.3V
0V
VDDO/2
VOH
VOL
VDDO/2
CLK
Q
tPHL tPLH
VDDO/2
FIGURE 2A - PROPAGATION DELAYS
fin = 200MHz, Vamp = 3.3V, tr = tf = 600ps
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
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Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
FIGURE 3A, 3B - SKEW DEFINITIONS & WAVEFORMS
Bank Skew - Skew between outputs within a bank. Outputs operating at the same temperature, supply voltages and with
equal load conditions.
Output Skew - Skew between outputs of any bank. Outputs operating at the same temperature, supply voltages and with
equal load conditions.
CLK
Qx0
Qx4
○○○○○○○○
tsk(b) tsk(b)
FIGURE 3A - BANK SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
VDDO/2 VDDO/2
VDDO/2 VDDO/2
CLK
QA0 - QA4
QB0 - QB4
QC0 - QC4
QD0 - QD4
tsk(o) tsk(o)
FIGURE 3B - OUTPUT SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
VDDO/2 VDDO/2
VDDO/2 VDDO/2
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
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Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
FIGURE 3C, 3D - SKEW DEFINITIONS & WAVEFORMS
CLK
PART 1 QA0 - QA4
QB0 - QB4
QC0 - QC4
QD0 - QD4
PART 2 QA0 - QA4
QB0 - QB4
QC0 - QC4
QD0 - QD4
tsk(p) tsk(p)
FIGURE 3B - OUTPUT SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
FIGURE 3C - MULTIPLE FREQUENCY SKEW
fin = 200MHz, Vamp = 3.3V, tr = tf = 200ps
CLK
QA0 - QA4,
QB0 - QB4,
QC0 - QC4,
or
QD0 - QD4
in ÷1
tsk(
w
)tsk(
w
)
QA0 - QA4,
QB0 - QB4,
QC0 - QC4,
or
QD0 - QD4
in ÷2
Multiple Frequency Skew - Skew between banks of outputs operating at different frequencies. Outputs operating at the
same temperature, supply voltages and with equal load conditions.
Part to Part Skew - Skew between outputs of any bank on different parts. Outputs operating at the same temperature, supply
voltages and with equal load conditions.
VDDO/2 VDDO/2
VDDO/2 VDDO/2
VDDO/2 VDDO/2
VDDO/2 VDDO/2
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
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Integrated
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ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
EE1
D1
D
ccc C
SEATING
PLANE
D2
-C-
E2
e
A
A1
A2
bc
L
θ
N
1
2
3
12 25
36
13 24
48 37
PACKAGE OUTLINE - Y SUFFIX
NOITAIRAVCEDEJ SRETEMILLIMNISNOISNEMIDLLA
LOBMYS CCB
MUMINIMLANIMONMUMIXAM
N84
A06.1
1A 50.051.0
2A 53.104.154.1
b71.022.072.0
c90.002.0
DCISAB00.9
1D CISAB00.7
2D 05.5
ECISAB00.9
1E CISAB00.7
2E 05.5
eCISAB5.0
L54.006.057.0
q
°0°7
ccc 80.0
TABLE 6. PACKAGE DIMENSIONS
Reference Document: JEDEC Publication 95, MS-026
8701I www.icst.com/products/hiperclocks.html REV. A MARCH 16, 2001
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Integrated
Circuit
Systems, Inc.
ICS8701I
LOW SKEW
¸
1,
¸
2
CLOCK GENERATOR
TABLE 7. ORDERING INFORMATION
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 and industrial applications. Any other applications such as those requiring 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.
rebmuNredrO/traPgnikraMegakcaPtnuoCerutarepmeT
IYC1078SCIIYC1078SCIPFQLdaeL84yartrep052C°58otC°04-
TIYC1078SCIIYC1078SCIleeRdnaepaTnoPFQLdaeL840002C°58otC°04-
