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Integrated Device Technology Electronic Components Datasheet

ICS553 Datasheet

LOW SKEW 1 TO 4 CLOCK BUFFER

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LOW SKEW 1 TO 4 CLOCK BUFFER
DATASHEET
ICS553
Description
The ICS553 is a low skew, single input to four output,
clock buffer. Part of IDT’s ClockBlocksTM family, this is
our lowest skew, small clock buffer.
See the ICS552-02 for a 1 to 8 low skew buffer. For
more than eight outputs, see the MK74CBxxx
BuffaloTM series of clock drivers.
IDT 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.
Features
Extremely low skew outputs (50 ps maximum)
Packaged in 8-pin SOIC
Pb (lead) free package
Low power CMOS technology
Operating voltages of 2.5 V to 5 V
Output Enable pin tri-states outputs
5 V tolerant input clock
Commercial (0 to +70°C) and Industrial (-40 to
+85°C) temperature ranges available
Block Diagram
ICLK
Q0
Q1
Q2
Q3
Output Enable
IDT® LOW SKEW 1 TO 4 CLOCK BUFFER
1
ICS553
REV N 051310


Integrated Device Technology Electronic Components Datasheet

ICS553 Datasheet

LOW SKEW 1 TO 4 CLOCK BUFFER

No Preview Available !

ICS553
LOW SKEW 1 TO 4 CLOCK BUFFER
Pin Assignment
VDD
Q0
Q1
GND
1
2
3
4
8 OE
7 Q3
6 Q2
5 ICLK
8-pin SOIC
FAN OUT BUFFER
Pin Descriptions
Pin
Number
1
2
3
4
5
6
7
8
Pin
Name
VDD
Q0
Q1
GND
ICLK
Q2
Q3
OE
Pin
Type
Power
Output
Output
Power
Input
Output
Output
Input
Pin Description
Connect to +2.5 V, +3.3 V or +5.0 V.
Clock output 0.
Clock output 1.
Connect to ground.
Clock input, 5 V tolerant input.
Clock Output 2.
Clock Output 3.
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 four 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 15 ps of skew.
IDT® LOW SKEW 1 TO 4 CLOCK BUFFER
2
ICS553
REV N 051310


Part Number ICS553
Description LOW SKEW 1 TO 4 CLOCK BUFFER
Maker IDT
Total Page 8 Pages
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