Document Outline
- General Description
- Features
- Block Diagram
- Pin Assignment
- Pin Descriptions
- Pin Characteristics
- Absolute Maximum Ratings
- Power Supply 3.3V DC Characteristics
- LVCMOS 3.3V DC Characteristics
- Power Supply 3.3V/2.5V DC Characteristics
- LVCMOS 3.3V/2.5V DC Characteristics
- 3.3V AC Characteristics
- 3.3V/2.5V DC Characteristics
- Parameter Measurement Information
- 3.3V Output Load AC Test Circuit Diagram
- 3.3V/2.5V Output Load AC Test Circuit Diagram
- Output Skew Diagram
- Part-to-Part Skew Diagram
- Output Rise/Fall Time Diagram
- Output Duty Cycle/Pulse Width/Period Diagram
- Propagation Delay Diagram
- Reliability Information
- Transistor Count
- Package Outline
- Pakcage Dimensions
- Ordering Information
- Revision History Sheet
8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
1
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
G
ENERAL
D
ESCRIPTION
The ICS8304 is a low skew, 1-to-4 Fanout
Buffer and a member of the HiPerClockS
TM
family of High Perfor mance Clock Solutions
from ICS. The ICS8304 is character ized at
full 3.3V for input V
DD
, and mixed 3.3V and 2.5V
for output operating supply modes (V
DDO
). Guaranteed out-
put and par t-to-par t skew character istics make the
ICS8304 ideal for those clock distribution applications
demanding well defined performance and repeatability.
F
EATURES
4 LVCMOS / LVTTL outputs
LVCMOS / LVTTL clock input
Maximum output frequency: 200MHz
Output skew: 45ps (maximum at 3.3V supply)
Part-to-part skew: 500ps (maximum)
Small 8 lead SOIC package saves board space
3.3V input, outputs may be either 3.3V or 2.5V supply modes
Lead-Free package available
0C to 70C ambient operating temperature
B
LOCK
D
IAGRAM
P
IN
A
SSIGNMENT
ICS8304
8-Lead SOIC, 150mil
3.9mm x 4.9mm, x 1.63mm package body
M Package
Top View
V
DDO
V
DD
CLK
GND
1
2
3
4
Q0
Q1
Q2
Q3
CLK
HiPerClockSTM
ICS
Q3
Q2
Q1
Q0
8
7
6
5
8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
2
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
T
ABLE
1. P
IN
D
ESCRIPTIONS
T
ABLE
2. P
IN
C
HARACTERISTICS
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8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
3
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
T
ABLE
3A. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
DD
= V
DDO
= 3.3V5%, T
A
= 0C
TO
70C
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A
BSOLUTE
M
AXIMUM
R
ATINGS
Supply Voltage, V
DD
4.6V
Inputs, V
I
-0.5V to V
DD
+ 0.5 V
Outputs, V
O
-0.5V to V
DDO
+ 0.5V
Package Thermal Impedance,
JA
112.7C/W (0 lfpm)
Storage Temperature, T
STG
-65C to 150C
NOTE: 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 be-
yond those listed in the
DC Characteristics or AC Character-
istics is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect product reliability.
T
ABLE
3C. P
OWER
S
UPPLY
DC C
HARACTERISTICS
,
V
DD
= 3.3V5%, V
DDO
= 2.5V5%, T
A
= 0C
TO
70C
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8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
4
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
T
ABLE
4B. AC C
HARACTERISTICS
,
V
DD
= 3.3V5%, V
DDO
= 2.5V5%, T
A
= 0C
TO
70C
T
ABLE
3D. LVCMOS / LVTTL DC C
HARACTERISTICS
,
V
DD
= 3.3V5%, V
DDO
= 2.5V5%, T
A
= 0C
TO
70C
T
ABLE
4A. AC C
HARACTERISTICS
,
V
DD
= V
DDO
= 3.3V5%, T
A
= 0C
TO
70C
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8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
5
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
P
ARAMETER
M
EASUREMENT
I
NFORMATION
2.5V O
UTPUT
L
OAD
AC T
EST
C
IRCUIT
3.3V O
UTPUT
L
OAD
AC T
EST
C
IRCUIT
SCOPE
Qx
LVCMOS
1.65V5%
GND
SCOPE
Qx
LVCMOS
2.05V5%
-1.25V5%
O
UTPUT
S
KEW
O
UTPUT
R
ISE
/F
ALL
T
IME
O
UTPUT
D
UTY
C
YCLE
/P
ULSE
W
IDTH
/P
ERIOD
Clock
Outputs
30%
70%
70%
30%
t
R
t
F
tsk(o)
V
DD
2
V
DD
2
Qx
Qy
tsk(pp)
V
DD
2
V
DD
2
Qx
Qy
PART 1
PART 2
Q0:Q3
t
PD
V
DD
2
V
DDO
2
P
ROPAGATION
D
ELAY
Pulse Width
t
PERIOD
t
PW
t
PERIOD
odc =
V
DDO
2
Q0:Q3
CLK
V
DD
,
V
DDO
-1.65V5%
GND
V
DD
V
DDO
1.25V5%
P
ART
-
TO
-P
ART
S
KEW
8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
6
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
T
RANSISTOR
C
OUNT
The transistor count for ICS8304 is: 416
T
ABLE
5.
JA
VS
. A
IR
F
LOW
T
ABLE
FOR
8 L
EAD
SOIC
JA
by Velocity (Linear Feet per Minute)
0
200
500
Single-Layer PCB, JEDEC Standard Test Boards
153.3C/W
128.5C/W
115.5C/W
Multi-Layer PCB, JEDEC Standard Test Boards
112.7C/W
103.3C/W
97.1C/W
NOTE: Most modern PCB designs use multi-layered boards. The data in the second row pertains to most designs.
R
ELIABILITY
I
NFORMATION
8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
7
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
T
ABLE
6. P
ACKAGE
D
IMENSIONS
- S
UFFIX
M
Reference Document: JEDEC Publication 95, MS-012
P
ACKAGE
O
UTLINE
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EAD
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8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
8
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
T
ABLE
7. O
RDERING
I
NFORMATION
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.
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The aforementioned trademark, HiPerClockSTM is a trademark of Integrated Circuit Systems, Inc. or its subsidiaries in the United States and/or other countries.
8304AM
www.icst.com/products/hiperclocks.html
REV. F SEPTEMBER 13, 2004
9
Integrated
Circuit
Systems, Inc.
ICS8304
L
OW
S
KEW
, 1-
TO
-4
LVCMOS / LVTTL F
ANOUT
B
UFFER
T
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