ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
MDS 552-01 AB
1
Revision 032200
Printed 11/14/00
Integrated Circuit Systems 525 Race Street San Jose CA 95126 (408) 295-9800tel www.icst.com
Description
The ICS552-01A produces 8 low skew
copies of a multiple of the input when a
clock or fundamental, parallel-mode crystal
is connected to it. Unlike other clock
drivers, it does not require a separate
oscillator for the input. Using a phase-
locked loop (PLL) to multiply the input
frequency, it is ideal for generating and
distributing multiple high frequency clocks.
Features
Packaged in 20 pin SSOP (QSOP)
Input frequency of 10.0 - 27.0 MHz
Contains on-chip multiplier with selections
of x1, x1.33, x2, x2.66, x3, x3.33, x4,
x4.66, x5, and x6
Provides 8 low skew outputs (<250 ps)
Output clock duty cycle of 40/60 at 3.3 V
Operating voltages of 3.0 V to 5.5 V
Industrial temperature available
Power Down and Tri state modes
Block Diagram
CLK1
CLK2
CLK3
CLK4
CLK6
CLK5
CLK7
CLK8
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Clock
Buffer/
Crystal
Oscillator
10.0 - 27.0 MHz
crystal or clock
VDD
GND
X2
X1
PLL
Multiplier
S3:S0
4
Multiplier Select Table
ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
MDS 552-01 AB
2
Revision 032200
Printed 11/14/00
Integrated Circuit Systems 525 Race Street San Jose CA 95126 (408) 295-9800tel www.icst.com
Pin #
Name
Type
Description
1
DC
-
Don't connect.
2
X2
XO
Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal.
3
X1/ICLK
XI
Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal, or clock.
4
VDD
P
Connect to +3.3 V or +5.0 V. Decouple with pin 6.
5
S2
I
Multiplier Select Pin 2 per table above.
6
GND
P
Connect to ground.
7
CLK1
O
Clock Output 1.
8
CLK2
O
Clock Output 2.
9
CLK3
O
Clock Output 3.
10
CLK4
O
Clock Output 4.
11
S1
I
Multiplier Select Pin 1 per table above.
12
CLK5
O
Clock Output 5.
13
CLK6
O
Clock Output 6.
14
GND
P
Connect to ground.
15
S3
I
Multiplier Select Pin 3 per table above.
16
VDD
P
Connect to +3.3 V or +5.0 V. Decouple with pin 14.
17
CLK7
O
Clock Output 7.
18
CLK8
O
Clock Output 8.
19
DC
-
Don't connect.
20
S0
I
Multiplier Select Pin 0 per table above.
Pin Descriptions
Key: I = Input; O = output; P = power supply connection, XI, XO = crystal connections
1
16
2
3
4
15
14
13
VDD
CLK1
X2
VDD
20 pin SSOP (QSOP)
5
6
7
8
12
11
10
9
CLK4
DC
X1/ICLK
DC
CLK8
S0
CLK7
CLK5
S1
CLK2
18
17
19
20
S2
GND
CLK6
GND
S3
Pin Assignment
CLK3
S3
S2
S1
S0
Multiplier
0
0
0
0
Power Down
0
0
0
1
x1
0
0
1
0
x1.333
0
0
1
1
x2
0
1
0
0
x2.666
0
1
0
1
x3
0
1
1
0
x3.333
0
1
1
1
x4
1
0
0
0
x5
1
0
0
1
x4.66
1
0
1
0
x6
1
1
0
1
Tri state All
0 = connect directly to ground.
1 = connect directly to VDD.
All clocks stop low in Power Down state.
All clocks outputs are high impedance in 1101 mode.
ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
MDS 552-01 AB
3
Revision 032200
Printed 11/14/00
Integrated Circuit Systems 525 Race Street San Jose CA 95126 (408) 295-9800tel www.icst.com
Parameter
Conditions
Minimum
Typical
Maximum
Units
ABSOLUTE MAXIMUM RATINGS (note 1)
ABSOLUTE MAXIMUM RATINGS (note 1)
Supply voltage, VDD
Referenced to GND
7
V
Inputs and Clock Outputs
Referenced to GND
-0.5
VDD+0.5
V
Ambient Operating Temperature
Commercial
0
70
C
Industrial
-40
85
C
Soldering Temperature
Max of 10 seconds
260
C
Storage temperature
-65
150
C
DC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
DC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
DC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
Operating Voltage, VDD
3.0
5.5
V
Input High Voltage, VIH
ICLK
(VDD/2)+1
VDD/2
V
Input Low Voltage, VIL
ICLK
VDD/2
(VDD/2)-1
V
Input High Voltage, VIH
S3:S0
2
V
Input Low Voltage, VIL
S3:S0
0.8
V
Output High Voltage, VOH
VDD=3.3V, IOH=-8mA
2.4
V
Output Low Voltage, VOL
VDD=3.3V, IOL=8mA
0.4
V
Output High Voltage, VOH, VDD = 3.3 or 5 V
IOH=-8mA
VDD-0.4
V
Operating Supply Current, IDD, at 3.3 V
No Load, 25 MHz in, x4
35
mA
Operating Supply Current, IDD, at 5 V
No Load, 25 MHz in, x4
59
mA
Power Down Supply Current, IDD, at 3.3 V
S3:S0 = 0 (Gnd)
55
A
Short Circuit Current, VDD = 3.3 V
Each output
50
mA
AC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
AC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
AC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
Input Crystal or Clock Frequency
10
27
MHz
Output Clock Rise Time
0.8 to 2.0 V
1.5
ns
Output Clock Fall Time
2.0 to 0.8 V
1.5
ns
Output Clock Duty Cycle
At VDD/2
40
50
60
%
Output to Output Skew
Rising edges at VDD/2
250
ps
Electrical Specifications
Note:
1. Stresses beyond those listed under Absolute Maximum Ratings could cause permanent damage to the device. Prolonged
exposure to levels above the operating limits but below the Absolute Maximums may affect device reliability.
External Components
A minimum number of external components are required for proper operation. A decoupling capacitor of
0.01 uF should be connected between VDD and GND on pins 4 and 6, and 16 and 14. Other VDDs and
GNDs can be connected to these pins or directly to their respective power planes. A 33
series terminating
resistor may be used on the clock output if the trace is longer than 1-inch.
The crystal should be a fundamental mode (do not use third overtone), parallel resonant, with accuracy as
required by the application. Crystal capacitors should be connected from pins X1 to ground and X2 to
ground. The value of these capacitors is given by the following equation, where C
L
is the crystal load
capacitance: Crystal caps (pF) = (C
L
-12) x 2. So for a crystal with 18pF load capacitance, two 12pF caps
should be used. For a clock input, connect it to X1/ICLK, and leave X2 unconnected (floating).
ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
MDS 552-01 AB
4
Revision 032200
Printed 11/14/00
Integrated Circuit Systems 525 Race Street San Jose CA 95126 (408) 295-9800tel www.icst.com
Ordering Information
Part/Order Number
Marking
Package
Shipping
Temperature
ICS552R-01
ICS552R-01
20 pin SSOP
Tubes
0 to 70 C
ICS552R-01T
ICS552R-01
20 pin SSOP
Tape and Reel
0 to 70 C
ICS552R-01I
ICS552R-01I
20 pin SSOP
Tubes
-40 to 85 C
ICS552R-01IT
ICS552R-01I
20 pin SSOP
Tape and Reel
-40 to 85 C
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 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.
20 pin SSOP
Inches
Inches
Millimeters
Millimeters
Symbol
Min
Max
Min
Max
A
0.053
0.069
1.35
1.75
A1
0.004
0.010
0.10
0.25
b
0.008
0.012
0.20
0.30
c
0.007
0.010
0.19
0.25
D
0.337
0.344
8.56
8.74
e .025 BSC
.025 BSC
0.635 BSC
0.635 BSC
E
0.228
0.244
5.79
6.20
E1
0.150
0.157
3.81
3.99
L
0.016
0.050
0.41
1.27
b
D
E1
E
e
A1
c
A
L
INDEX
AREA
1
2
Package Outline and Package Dimensions
(
For current dimensional specifications, see JEDEC Publication No. 95.)
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