ICS553MIT [ICSI]
LOW SKEW 1 TO 4 CLOCK BUFFER; 低偏移1至4时钟缓冲器
| 型号： | ICS553MIT |
| 厂家： | 
INTEGRATED CIRCUIT SOLUTION INC |
| 描述： | LOW SKEW 1 TO 4 CLOCK BUFFER |
| 文件： | 总6页 (文件大小：66K) |
| 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’ ClockBlocks family, this is
our lowest skew, small clock buffer.
• Extremely low skew outputs (50 ps maximum)
• Packaged in 8-pin SOIC
TM
• Available in Pb (lead) free package
• Low power CMOS technology
• Operating Voltages of 2.5 to 5V
• Output Enable pin tri-states outputs
• 5V tolerant input clock
See the ICS552-02 for a 1 to 8 low skew buffer. For
more than 8 outputs see the MK74CBxxx Buffalo
series of clock drivers.
TM
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.
• Industrial temperature
Block Diagram
Q0
Q1
Q2
Q3
ICLK
Output Enable
MDS 553 H
1
Revision 080404
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
Pin
Pin
Pin Description
Number Name Type
1
2
3
4
5
6
7
8
VDD
Q0
Power Connect to +2.5V, +3.3V or +5.0V.
Output Clock Output 0.
Output Clock Output 1.
Power Connect to ground.
Q1
GND
ICLK
Q2
Input
Clock Input. 5V tolerant input.
Output Clock Output 2.
Output Clock Output 3.
Q3
OE
Input
Output Enable. Tri-states outputs when low. Connect to VDD for normal operation.
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 H
2
Revision 080404
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
7V
Output Enable and All Outputs
ICLK
-0.5V to VDD+0.5V
-0.5V to 5.5V
-40 to +85 °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.
+85
Units
°C
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
-40
+2.375
+5.25
V
DC Electrical Characteristics
VDD=2.5V 5ꢀ, Ambient temperature -40 to +85 °C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
2.375
Typ.
Max.
Units
Operating Voltage
VDD
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
V
Note 1
Note 1
VDD/2+0.5
IH
V
VDD/2-0.5
VDD
V
IL
V
1.8
2
V
IH
V
0.7
V
IL
V
I
I
= -16 mA
= 16 mA
V
OH
OH
Output Low Voltage
V
0.4
V
OL
OL
Operating Supply Current
Nominal Output Impedance
Input Capacitance
IDD
No load, 135 MHz
25
20
5
mA
Ω
Z
O
IN
C
ICLK, OE pin
pF
mA
Short Circuit Current
I
28
OS
MDS 553 H
3
Revision 080404
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 5ꢀ , Ambient temperature -40 to +85 °C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
3.15
Typ.
Max.
3.45
Units
Operating Voltage
VDD
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
V
Note 1
Note 1
VDD/2+0.7
5.5
IH
V
VDD/2-0.7
VDD
IL
V
2
IH
V
0.8
IL
V
I
I
I
= -25 mA
= 25 mA
= -12 mA
2.4
OH
OH
OL
OH
Output Low Voltage
V
0.4
OL
Output High Voltage (CMOS
Level)
V
VDD-0.4
OH
Operating Supply Current
Nominal Output Impedance
Input Capacitance
IDD
No load, 135 MHz
ICLK, OE pin
35
20
5
mA
Ω
Z
O
IN
C
pF
mA
Short Circuit Current
I
50
OS
VDD=5V 5ꢀ , Ambient temperature -40 to +85 °C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
4.75
Typ.
Max.
5.25
Units
Operating Voltage
VDD
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
V
Note 1
Note 1
VDD/2+1
5.5
IH
V
VDD/2-1
VDD
0.8
IL
V
2
IH
V
IL
V
I
I
I
= -35 mA
= 35 mA
= -12 mA
2.4
OH
OH
OL
OH
Output Low Voltage
V
0.4
OL
Output High Voltage (CMOS
Level)
V
VDD-0.4
OH
Operating Supply Current
Nominal Output Impedance
Input Capacitance
IDD
No load, 135 MHz
ICLK, OE pin
45
20
5
mA
Ω
Z
O
IN
C
pF
mA
Short Circuit Current
I
80
OS
Notes: 1. Nominal switching threshold is VDD/2
MDS 553 H
4
Revision 080404
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 5ꢀ, Ambient Temperature -40 to +85 °C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
Typ. Max. Units
Input Frequency
0
200
1.5
1.5
5
MHz
ns
Output Rise Time
t
0.8 to 2.0V, C =15pF
1.0
1.0
3
OR
L
Output Fall Time
t
2.0 to 0.8V, C =15pF
ns
OF
L
Propagation Delay
Output to output skew
Device to device skew
Note 1
Note 2
2.2
ns
Rising edges at VDD/2
Rising edges at VDD/2
0
50
ps
500
ps
VDD = 3.3V 5ꢀ, Ambient Temperature -40 to +85 °C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
Typ. Max. Units
Input Frequency
0
200
1.0
1.0
4
MHz
ns
Output Rise Time
t
0.8 to 2.0V, C =15pF
0.6
0.6
2.4
0
OR
L
Output Fall Time
t
2.0 to 0.8V, C =15pF
ns
OF
L
Propagation Delay
Output to output skew
Device to device skew
Note 1
Note 2
2.0
ns
Rising edges at VDD/2
Rising edges at VDD/2
50
ps
500
ps
VDD = 5V 5ꢀ, Ambient Temperature -40 to +85 °C, unless stated otherwise
Parameter
Symbol
Conditions
Min.
Typ. Max. Units
Input Frequency
0
200
0.7
0.7
4
MHz
ns
Output Rise Time
t
0.8 to 2.0V, C =15pF
0.3
0.3
2.5
0
OR
L
Output Fall Time
t
2.0 to 0.8V, C =15pF
ns
OF
L
Propagation Delay
Note 1
Note 2
1.8
ns
Output to output skew
Device to device skew
Notes: 1. With rail to rail input clock
Rising edges at VDD/2
Rising edges at VDD/2
50
ps
500
ps
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.
Thermal Characteristics
Parameter
Symbol
Conditions
Min.
Typ. Max. Units
Thermal Resistance Junction to
Ambient
θ
θ
θ
θ
Still air
150
140
120
40
°C/W
°C/W
°C/W
°C/W
JA
JA
JA
JC
1 m/s air flow
3 m/s air flow
Thermal Resistance Junction to Case
MDS 553 H
5
Revision 080404
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
8
Symbol
Min
Max
1.75
0.25
0.51
0.25
5.00
4.00
Min
Max
A
A1
B
C
D
E
e
1.35
0.10
0.33
0.19
4.80
3.80
.0532
.0040
.013
.0688
.0098
.020
E
H
.0075
.1890
.1497
.0098
.1968
.1574
INDEX
AREA
1.27 BASIC
0.050 BASIC
1
2
H
h
5.80
6.20
0.50
1.27
8°
.2284
.010
.016
0°
.2440
.020
.050
8°
0.25
0.40
0°
D
L
α
A
h x 45
A1
C
- C -
e
SEATING
PLANE
B
L
.10 (.004)
C
Ordering Information
Part / Order Number
ICS553MI
Marking
553MI
553MI
553MILF
553MILF
Shipping Packaging
Tubes
Package
8-pin SOIC
8-pin SOIC
8-pin SOIC
8-pin SOIC
Temperature
-40 to +85 °C
-40 to +85 °C
-40 to +85 °C
-40 to +85 °C
ICS553MIT
Tape and Reel
Tubes
Tape and Reel
ICS553MILF
ICS553MILFT
“LF” denotes Pb (lead) free package.
While the information presented herein has been checked for both accuracy and reliability, Integrated Circuit Systems (ICS)
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 H
6
Revision 080404
Integrated Circuit Systems ● 525 Race Street, San Jose, CA 95126 ● tel (408) 295-9800 ● www.icst.com
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