8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
1
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
GENERAL DESCRIPTION
The ICS8304I is a low skew, 1-to-4 Fanout
Buffer and a member of the HiPerClockS™
family of High Performance Clock Solutions
from ICS. The ICS8304I is characterized at
full 3.3V for input VDD, and mixed 3.3V and
2.5V for output operating supply modes (VDDO) . Guaran-
teed output and part-to-part skew characteristics make
the ICS8304I ideal for those clock distribution
applications demanding well defined performance and
repeatability.
FEATURES
•4 L VCMOS / L VTTL outputs
•L VCMOS clock input
•CLK can accept the following input levels: L VCMOS, L VTTL
•Maximum output frequency: 166MHz
•Output skew: 60ps (maximum)
•Part-to-part skew: 650ps (maximum)
•Small 8 lead SOIC package saves board space
•3.3V input, outputs may be either 3.3V or 2.5V supply modes
•-40°C to 85°C ambient operating temperature
BLOCK DIAGRAM PIN ASSIGNMENT
ICS8304I
8-Lead SOIC
3.8mm x 4.8mm, x 1.47mm package body
M Package
Top View
VDDO
VDD
CLK
GND
1
2
3
4
Q0
Q1
Q2
Q3
CLK
HiPerClockS™
,&6
Q3
Q2
Q1
Q0
8
7
6
5
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
2
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
TABLE 1. PIN DESCRIPTIONS
TABLE 2. PIN CHARACTERISTICS
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
C
NI
ecnaticapaCtupnI 4Fp
C
DP
ecnaticapaCnoitapissiDrewoP )tuptuorep( V
DD
V,
ODD
V564.3=51Fp
R
PULLUP
rotsiseRpulluPtupnI 15KΩ
R
NWODLLUP
rotsiseRnwodlluPtupnI 15KΩ
R
TUO
ecnadepmItuptuO 7 Ω
rebmuNemaNepyTnoitpircseD
1V
ODD
rewoP.V5.2roV3.3ottcennoC.nipylppustuptuO
2V
DD
rewoP.V3.3ottcennoC.nipylppusevitisoP
3KLCtupnInwodlluP.tupnikcolcLTTVL/SOMCVL
4DNGrewoP.dnuorgottcennoC.dnuorgylppusrewoP
50QtuptuO .slevelecafretniLTTVL/SOMCVL.tuptuokcolcelgniS
61QtuptuO .slevelecafretniLTTVL/SOMCVL.tuptuokcolcelgniS
72QtuptuO .slevelecafretniLTTVL/SOMCVL.tuptuokcolcelgniS
83QtuptuO .slevelecafretniLTTVL/SOMCVL.tuptuokcolcelgniS
:ETON
pulluP
dna
nwodlluP
.seulavlacipytrof,scitsiretcarahCniP,2elbaTeeS.srotsisertupnilanretniotrefer
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
3
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
ABSOLUTE MAXIMUM RATINGS
Supply V oltage, VDDx 4.6V
Inputs, VI-0.5V to VDD+ 0.5V
Outputs, VO-0.5V to VDDO + 0.5V
Package Thermal Impedance, θJA 112.7°C/W (0 lfpm)
Storage Temperature, TSTG -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. Functional operation of product at these conditions or any conditions beyond those listed in the
DC Characteristics
or
AC Characteristics
is not implied. Exposure to absolute maximum rating conditions for extended peri-
ods may affect product reliability.
TABLE 3A. POWER SUPPLY DC CHARACTERISTICS, VDD = VDDO = 3.3V±5%, TA = -40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
DD
egatloVylppuSrewoP531.33.3564.3V
V
ODD
egatloVylppuSrewoPtuptuO531.33.3564.3V
I
DD
tnerruCylppuSrewoP 81Am
I
ODD
tnerruCylppuStuptuO 11Am
TABLE 3B. LVCMOS / LVTTL DC CHARACTERISTICS, VDD = VDDO = 3.3V±5%, TA = -40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
HI
egatloVhgiHtupnI2V
DD
3.0+V
V
LI
egatloVwoLtupnI3.0-3.1V
I
HI
tnerruChgiHtupnIV
DD
V=
NI
V564.3=051Aµ
I
LI
tnerruCwoLtupnIV
DD
V,V564.3=
NI
V0=5-Aµ
V
HO
egatloVhgiHtuptuO 1ETONotrefeR6.2V
I
HO
Am61-=9.2V
I
HO
Au001-=3 V
V
LO
egatloVwoLtuptuO 1ETONotrefeR5.0V
I
LO
Am61=52.0V
I
LO
Au001=51.0V
05htiwdetanimretstuptuO:1ETON ΩVot
ODD
."tiucriCtseTdaoLtuptuOV3.3",noitceStnemerusaeMretemaraPeeS.2/
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
4
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
TABLE 3C. POWER SUPPLY DC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 2.5V±5%, TA = -40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
DD
egatloVylppuSevitisoP 531.33.3564.3V
V
ODD
egatloVylppuStuptuO 573.25.2526.2V
I
DD
tnerruCylppuSrewoP 81Am
I
ODD
tnerruCylppuStuptuO 11Am
TABLE 3D. LVCMOS / LVTTL DC CHARACTERISTICS, VDD = 3.3V±5%, VDDO = 2.5V±5%, TA = -40°C TO 85°C
TABLE 4A. AC CHARACTERISTICS, VDD = VDDO = 3.3V±5%, TA = -40°C TO 85°C
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
f
XAM
ycneuqerFtuptuO 661zHM
pt
HL
1ETON;hgiH-ot-woL,yaleDnoitagaporP IJzHM6612 3.3sn
t
)o(ks4,2ETON;wekStuptuOzHM331=f05sp
t
)pp(ks4,3ETON;wekStraP-ot-traP 006sp
t
R
emiTesiRtuptuO%07ot%03052005sp
t
F
emiTllaFtuptuO%07ot%03052005sp
cdoelcyCytuDtuptuO 0406%
.esiwrehtodetonsselnuzHM661taderusaemsretemarapllA VmorfderusaeM:1ETON
DD
Vottupniehtfo2/
ODD
.tuptuoehtfo2/ .snoitidnocdaollauqehtiwdnaegatlovylppusemasehttastuptuoneewtebwekssadenifeD:2ETON VtaderusaeM
ODD
.2/ segatlovylppusemasehttagnitareposecivedtnereffidnostuptuoneewtebwekssadenifeD:3ETON derusaemerastuptuoeht,ecivedhcaenostupnifoepytemasehtgnisU.snoitidnocdaollauqehtiwdna Vta
ODD
.2/ .56dradnatSCEDEJhtiwecnadroccanidenifedsiretemarapsihT:4ETON
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
V
HI
egatloVhgiHtupnI2V
DD
3.0+V
V
LI
egatloVwoLtupnI3.0-3.1V
I
HI
tnerruChgiHtupnIV
DD
V=
NI
V564.3=051Aµ
I
LI
tnerruCwoLtupnIV
DD
V,V564.3=
NI
V0=5-Aµ
V
HO
1ETON;egatloVhgiHtuptuO1.2V
V
LO
1ETON;egatloVwoLtuptuO 5.0V
05htiwdetanimretstuptuO:1ETON ΩVot
ODD
,noitceStnemerusaeMretemaraPeeS.2/
."tiucriCtseTdaoLtuptuOV5.2/V3.3"
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
5
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
lobmySretemaraPsnoitidnoCtseTmuminiMlacipyTmumixaMstinU
f
XAM
ycneuqerFtuptuO 661zHM
pt
HL
1ETON;hgiH-ot-woL,yaleDnoitagaporP IJzHM6613.27.3sn
t
)o(ks4,2ETON;wekStuptuOzHM331=f06sp
t
)pp(ks4,3ETON;wekStraP-ot-traP 056sp
t
R
emiTesiRtuptuO%07ot%03052005sp
t
F
emiTllaFtuptuO%07ot%03052005sp
cdoelcyCytuDtuptuO 0406%
.esiwrehtodetonsselnuzHM661taderusaemsretemarapllA VmorfderusaeM:1ETON
DD
Vottupniehtfo2/
ODD
.tuptuoehtfo2/ .snoitidnocdaollauqehtiwdnaegatlovylppusemasehttastuptuoneewtebwekssadenifeD:2ETON VtaderusaeM
ODD
.2/ segatlovylppusemasehttagnitareposecivedtnereffidnostuptuoneewtebwekssadenifeD:3ETON derusaemerastuptuoeht,ecivedhcaenostupnifoepytemasehtgnisU.snoitidnocdaollauqehtiwdna Vta
ODD
.2/ .56dradnatSCEDEJhtiwecnadroccanidenifedsiretemarapsihT:4ETON
TABLE 4B. AC C HARACTERISTICS, VDD = 3.3V±5%, VDDO = 2.5V±5%, TA = -40°C TO 85°C
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
6
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
SCOPE
Qx
LVCMOS
3.3V OUTPUT LOAD TEST CIRCUIT
-1.65V±5%
GND
VDD,
VDDO
1.65V±5%
SCOPE
Qx
LVCMOS
VDD
VDDO
3.3V/2.5V OUTPUT LOAD TEST CIRCUIT
2.05V±5%
GND
1.25V±5%
-1.25V±5%
PARAMETER MEASUREMENT INFORMATION
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
7
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
INPUT AND OUTPUT RISE AND FALL TIME
Clock Inputs
and Outputs
30%
70% 70%
30%
t
R
t
F
OUTPUT SKEW
Qx
Qy
tsk(o)
PART-TO-PART SKEW
Qx
Qy
PART 1
PART 2
tsk(pp)
VDDO
2
VDDO
2
VDDO
2
VDDO
2
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
8
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
tPW & tPERIOD
PROPAGATION DELAY
CLK
Q0:Q3
t
PD
V
DD
2
V
DDO
2
t
PW
t
PERIOD
V
DDO
2
V
DDO
2
V
DDO
2
t
PW
t
PERIOD
odc =
Q0 :Q3
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
9
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
TRANSISTOR COUNT
The transistor count for ICS8304I is: 416
TABLE 5. θJAVS. AIR FLOW TABLE
qJA by V elocity (Linear Feet per Minute)
0 200 500
Single-Layer PCB, JEDEC Standard Test Boards 153.3°C/W 128.5°C/W 115.5°C/W
Multi-Layer PCB, JEDEC Standard Test Boards 112.7°C/W 103.3°C/W 97.1°C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
10
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
TABLE 6. PACKAGE DIMENSIONS - SUFFIX M
Reference Document: JEDEC Publication 95, MS-012
PACKAGE OUTLINE - SUFFIX M
LOBMYS sretemilliM
NUMINIMMUMIXAM
N8
A53.157.1
1A01.052.0
B33.015.0
C91.052.0
D08.400.5
E08.300.4
eCISAB72.1
H08.502.6
h52.005.0
L04.072.1
α°0°8
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
11
Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
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
IMA4038SCIIMA4038CIOSdael8ebutrep69C°58otC°04-
TIMA4038SCIIMA4038leeRdnaepaTnoCIOSdael80052C°58otC°04-
8304AMI www.icst.com/products/hiperclocks.html REV. B APRIL 4, 2002
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Integrated
Circuit
Systems, Inc.
ICS8304I
LOW SKEW, 1-TO-4
LVCMOS / LVTTL FANOUT BUFFER
TEEHSYROTSIHNOISIVER
veRelbaTegaPegnahCfonoitpircseDetaD
BB33 Idedda,elbaTscitsiretcarahCCDLTTVL/SOMCVL
HO
Idna
LO
snoitidnoCtseT
Vot
HO
Vdna
LO
.swor 20/4/4
