ICS553 [ICSI]
LOW SKEW 1 TO 4 CLOCK BUFFER; 低偏移1至4时钟缓冲器
| 型号： | ICS553 |
| 厂家： | 
INTEGRATED CIRCUIT SOLUTION INC |
| 描述： | LOW SKEW 1 TO 4 CLOCK BUFFER |
| 文件： | 总6页 (文件大小：86K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ICS553
LOW SKEW 1 TO 4 CLOCK BUFFER
Description
Features
The ICS553 is a low skew, single input to four output,
clock buffer. Part of ICS’ Clock BlocksTM family, this is
our lowest skew, small clock buffer. See the ICS552-02
for a 1 to 8 low skew buffer. For more than 8 outputs
see the MK74CBxxx BuffaloTM series of clock drivers.
• Extremely low skew outputs (50ps maximum)
• Packaged in 8 pin SOIC
• Low power CMOS technology
• Operating Voltages of 2.5 to 5V
• Output Enable pin tri-states outputs
• 5V tolerant input clock
ICS makes many non-PLL and PLL based low skew
output devices as well as Zero Delay Buffers to
synchronize clocks. Contact us for all of your clocking
needs.
Block Diagram
Q0
Q1
Q2
Q3
ICLK
Output Enable
MDS 553 B
1
Revision 052501
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
ICS553
LOW SKEW 1 TO 4 CLOCK BUFFER
Pin Assignment
VDD
Q0
1
2
3
4
8
7
6
5
OE
Q3
Q1
Q2
GND
ICLK
8 Pin (150 mil) SOIC
Pin Descriptions
Pin
Number
Pin
Name
Pin
Type
Pin Description
1
VDD
Power Connect to +2.5V, +3.3V or +5.0V.
Output Clock Output 0
2
3
4
5
6
7
8
Q0
Q1
Output Clock Output 1
GND
ICLK
Q2
Power Ground
Input
Clock Input. 5V tolerant input.
Output Clock Output 2
Output Clock Output 3
Q3
OE
Input
Output Enable. Tri-states outputs when low.
External Components
A minimum number of external components are required for proper operation. A decoupling capacitor of
0.01 µF should be connected between VDD on pin 1 and GND on pin 4, as close to the device as possible.
A 33 Ω series terminating resistor may be used on each clock output if the trace is longer than 1 inch.
To achieve the low output skew that the ICS553 is capable of, careful attention must be paid to board
layout. Essentially, all 4 outputs must have identical terminations, identical loads and identical trace
geometries. If they do not, the output skew will be degraded. For example, using a 30Ω series termination
on one output (with 33Ω on the others) will cause at least 15ps of skew.
MDS 553 B
2
Revision 052501
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
ICS553
LOW SKEW 1 TO 4 CLOCK BUFFER
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS553. These ratings, which
are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of the
device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Rating
Supply Voltage, VDD
All Inputs and Outputs
7V
-0.5V to VDD+0.5V
0 to +70°C
-65 to +150°C
175°C
Ambient Operating Temperature
Storage Temperature
Junction Temperature
Soldering Temperature
260°C
Recommended Operation Conditions
Parameter
Min.
Typ.
Max.
+70
Units
°C
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
0
–
+2.375
+5.25
V
DC Electrical Characteristics
VDD=2.5V ±5%, Ambient temperature 0 to +70°C, unless stated otherwise
Parameter
Operating Voltage
Symbol
VDD
VIH
Conditions
Min.
2.375
Typ.
Max.
Units
2.625
5.5
V
V
Input High Voltage, ICLK
Input Low Voltage, ICLK
Input High Voltage, OE
Input Low Voltage, OE
Output High Voltage
Note 1
Note 1
VDD/2+0.5
VIL
VDD/2-0.5
VDD
V
VIH
2
2
V
VIL
0.4
V
VOH
VOL
IDD
IOS
IOH = -16 mA
V
Output Low Voltage
IOL = 16 mA
0.5
V
Operating Supply Current
Short Circuit Current
No load, 135 MHz
25
mA
mA
±28
MDS 553 B
3
Revision 052501
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
ICS553
LOW SKEW 1 TO 4 CLOCK BUFFER
DC Electrical Characteristics (continued)
VDD=3.3V ±5% , Ambient temperature 0 to +70°C, unless stated otherwise
Parameter
Operating Voltage
Symbol
VDD
VIH
Conditions
Min.
3.15
Typ.
Max.
3.45
Units
V
V
V
V
V
V
V
V
Input High Voltage, ICLK
Input Low Voltage, ICLK
Input High Voltage, OE
Input Low Voltage, OE
Output High Voltage
Note 1
Note 1
VDD/2+0.7
5.5
VIL
VDD/2-0.7
VDD
VIH
2
VIL
0.4
VOH
VOL
IOH = -25 mA
IOL = 25 mA
IOH = -12 mA
2.4
Output Low Voltage
0.8
Output High Voltage (CMOS
Level)
VOH
VDD-0.4
Operating Supply Current
Short Circuit Current
IDD
IOS
No load, 135 MHz
35
mA
±50
mA
VDD=5V ±5% , Ambient temperature 0 to +70°C, unless stated otherwise
Parameter
Operating Voltage
Symbol
VDD
VIH
Conditions
Min.
4.75
Typ.
Max.
5.25
Units
V
V
V
V
V
V
V
V
Input High Voltage, ICLK
Input Low Voltage, ICLK
Input High Voltage, OE
Input Low Voltage, OE
Output High Voltage
Note 1
Note 1
VDD/2+1
5.5
VIL
VDD/2-1
VDD
0.4
VIH
2
VIL
VOH
VOL
IOH = -45 mA
IOL = 45 mA
IOH = -12 mA
2.4
Output Low Voltage
0.8
Output High Voltage (CMOS
Level)
VOH
VDD-0.4
Operating Supply Current
Short Circuit Current
IDD
IOS
No load, 135 MHz
50
mA
mA
±80
Notes: 1. Nominal switching threshold is VDD/2
MDS 553 B
4
Revision 052501
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
ICS553
LOW SKEW 1 TO 4 CLOCK BUFFER
AC Electrical Characteristics
VDD = 2.5V ±5%, Ambient Temperature 0 to +70° C, unless stated otherwise
Parameter
Input Frequency
Symbol
Conditions
Min.
Typ. Max. Units
0
200
1.5
1.5
MHz
ns
Output Rise Time
Output Fall Time
tOR
tOF
0.8 to 2.0V, CL=15pF
2.0 to 0.8V, CL=15pF
ns
Propagation Delay
Output to output skew
Note 1
Note 2
3
0
ns
Rising edges at VDD/2
50
ps
VDD = 3.3V ±5%, Ambient Temperature 0 to +70° C, unless stated otherwise
Parameter
Input Frequency
Symbol
Conditions
Min.
Typ. Max. Units
0
200
1.0
1.0
MHz
ns
Output Rise Time
Output Fall Time
tOR
tOF
0.8 to 2.0V, CL=15pF
2.0 to 0.8V, CL=15pF
ns
Propagation Delay
Output to output skew
Note 1
Note 2
2.6
0
ns
Rising edges at VDD/2
50
ps
VDD = 5V ±5%, Ambient Temperature 0 to +70° C, unless stated otherwise
Parameter
Input Frequency
Symbol
Conditions
Min.
Typ. Max. Units
0
200
0.7
0.7
MHz
ns
Output Rise Time
Output Fall Time
tOR
tOF
0.8 to 2.0V, CL=15pF
2.0 to 0.8V, CL=15pF
ns
Propagation Delay
Output to output skew
Note 1
Note 2
2.5
0
ns
Rising edges at VDD/2
50
ps
Notes: 1. With rail to rail input clock
2. Between any 2 outputs with equal loading.
3. Duty cycle on outputs will match incoming clock duty cycle. Consult ICS for tight duty cycle clock
generators.
MDS 553 B
5
Revision 052501
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
ICS553
LOW SKEW 1 TO 4 CLOCK BUFFER
Package Outline and Package Dimensions (8 pin SOIC, 150 Mil. Narrow Body)
Package dimensions are kept current with JEDEC Publication No. 95
Millimeters
Inches
Min Max
Symbol
Min
Max
1.75
0.25
0.51
0.25
5.00
4.00
A
A1
B
C
D
E
e
1.35
1.10
0.33
0.19
4.80
3.80
0.0532 0.0688
0.0040 0.0098
0.013
0.0075 0.0098
.1890 .1968
0.020
0.1497 0.1574
0.050 Basic
In de x
A re a
1.27 Basic
E
H
H
h
5.80
0.25
0.40
0°
6.20
0.50
1.27
8°
0.2284 0.2440
0.010
0.016
0°
0.020
0.050
8°
L
a
P in 1
D
h x 4 5 0
A
Q
c
e
b
Ordering Information
Part / Order Number
Marking
Shipping
packaging
Tubes
Package
Temperature
ICS553M
ICS553M
ICS553M
8 pin SOIC
8 pin SOIC
0 to +70° C
0 to +70° C
ICS553MT
Tape and Reel
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS)
assumes no responsibility for either its use or for the 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.
MDS 553 B
6
Revision 052501
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
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