ICST ICS552R-01IT Crystal oscillator & multiplier with 8 low skew output Datasheet

ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
Description
Features
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 phaselocked loop (PLL) to multiply the input
frequency, it is ideal for generating and
distributing multiple high frequency clocks.
• 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
S3:S0
VDD
4
10.0 - 27.0 MHz
crystal or clock X1
Clock
Buffer/
Crystal
Oscillator
X2
GND
PLL
Multiplier
Output
Buffer
CLK1
Output
Buffer
CLK2
Output
Buffer
CLK3
Output
Buffer
CLK4
Output
Buffer
CLK5
Output
Buffer
CLK6
Output
Buffer
CLK7
Output
Buffer
CLK8
1
Revision 032200
Printed 11/14/00
Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800tel • www.icst.com
MDS 552-01 AB
ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
Pin Assignment
Multiplier Select Table
DC
1
20
S0
X2
2
19
DC
X1/ICLK
3
18
CLK8
VDD
4
17
CLK7
S2
5
16
VDD
GND
6
15
S3
CLK1
7
14
GND
CLK2
8
13
CLK6
CLK3
9
12
CLK5
CLK4
10
11
S1
20 pin SSOP (QSOP)
S3
0
0
0
0
0
0
0
0
1
1
1
1
S2
0
0
0
0
1
1
1
1
0
0
0
1
S1
0
0
1
1
0
0
1
1
0
0
1
0
S0
0
1
0
1
0
1
0
1
0
1
0
1
Multiplier
Power Down
x1
x1.333
x2
x2.666
x3
x3.333
x4
x5
x4.66
x6
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.
Pin Descriptions
Pin #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Name
DC
X2
X1/ICLK
VDD
S2
GND
CLK1
CLK2
CLK3
CLK4
S1
CLK5
CLK6
GND
S3
VDD
CLK7
CLK8
DC
S0
Type
XO
XI
P
I
P
O
O
O
O
I
O
O
P
I
P
O
O
I
Description
Don't connect.
Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal.
Crystal connection. Connect to a 10 - 27 MHz fundamental mode crystal, or clock.
Connect to +3.3 V or +5.0 V. Decouple with pin 6.
Multiplier Select Pin 2 per table above.
Connect to ground.
Clock Output 1.
Clock Output 2.
Clock Output 3.
Clock Output 4.
Multiplier Select Pin 1 per table above.
Clock Output 5.
Clock Output 6.
Connect to ground.
Multiplier Select Pin 3 per table above.
Connect to +3.3 V or +5.0 V. Decouple with pin 14.
Clock Output 7.
Clock Output 8.
Don't connect.
Multiplier Select Pin 0 per table above.
Key: I = Input; O = output; P = power supply connection, XI, XO = crystal connections
2
Revision 032200
Printed 11/14/00
Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800tel • www.icst.com
MDS 552-01 AB
ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
Electrical Specifications
Parameter
Conditions
Minimum
Typical
Maximum
Units
7
VDD+0.5
70
85
260
150
V
V
°C
°C
°C
°C
5.5
V
V
V
V
V
V
V
V
mA
mA
µA
mA
ABSOLUTE MAXIMUM RATINGS (note 1)
Supply voltage, VDD
Inputs and Clock Outputs
Ambient Operating Temperature
Soldering Temperature
Storage temperature
Referenced to GND
Referenced to GND
Commercial
Industrial
Max of 10 seconds
-0.5
0
-40
-65
DC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
Operating Voltage, VDD
Input High Voltage, VIH
Input Low Voltage, VIL
Input High Voltage, VIH
Input Low Voltage, VIL
Output High Voltage, VOH
Output Low Voltage, VOL
Output High Voltage, VOH, VDD = 3.3 or 5 V
Operating Supply Current, IDD, at 3.3 V
Operating Supply Current, IDD, at 5 V
Power Down Supply Current, IDD, at 3.3 V
Short Circuit Current, VDD = 3.3 V
ICLK
ICLK
S3:S0
S3:S0
VDD=3.3V, IOH=-8mA
VDD=3.3V, IOL=8mA
IOH=-8mA
No Load, 25 MHz in, x4
No Load, 25 MHz in, x4
S3:S0 = 0 (Gnd)
Each output
3.0
(VDD/2)+1
VDD/2
VDD/2
(VDD/2)-1
2
0.8
2.4
0.4
VDD-0.4
35
59
55
±50
AC CHARACTERISTICS (VDD = 3.3 V or 5 V unless noted)
Input Crystal or Clock Frequency
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle
Output to Output Skew
Note:
10
0.8 to 2.0 V
2.0 to 0.8 V
At VDD/2
Rising edges at VDD/2
40
50
27
1.5
1.5
60
250
MHz
ns
ns
%
ps
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 Ω 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 CL is the crystal load
capacitance: Crystal caps (pF) = (CL -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).
3
Revision 032200
Printed 11/14/00
Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800tel • www.icst.com
MDS 552-01 AB
ICS552-01A
Crystal Oscillator & Multiplier with 8 Low Skew Outputs
Package Outline and Package Dimensions
(For current dimensional specifications, see JEDEC Publication No. 95.)
20 pin SSOP
E1
INDEX
AREA
1
Symbol
A
A1
b
c
D
e
E
E1
L
E
2
Inches
Min
Max
0.053 0.069
0.004 0.010
0.008 0.012
0.007 0.010
0.337 0.344
.025 BSC
0.228 0.244
0.150 0.157
0.016 0.050
Millimeters
Min
Max
1.35
1.75
0.10
0.25
0.20
0.30
0.19
0.25
8.56
8.74
0.635 BSC
5.79
6.20
3.81
3.99
0.41
1.27
D
A1
A
c
e
b
L
Ordering Information
Part/Order Number
ICS552R-01
ICS552R-01T
ICS552R-01I
ICS552R-01IT
Marking
ICS552R-01
ICS552R-01
ICS552R-01I
ICS552R-01I
Package
20 pin SSOP
20 pin SSOP
20 pin SSOP
20 pin SSOP
Shipping
Tubes
Tape and Reel
Tubes
Tape and Reel
Temperature
0 to 70 °C
0 to 70 °C
-40 to 85 °C
-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.
4
Revision 032200
Printed 11/14/00
Integrated Circuit Systems • 525 Race Street • San Jose • CA • 95126 • (408) 295-9800tel • www.icst.com
MDS 552-01 AB
Similar pages