Clock Synthesizer. ICS650R-11B Datasheet

ICS650R-11B Synthesizer. Datasheet pdf. Equivalent


Integrated Circuit Systems ICS650R-11B
( DataSheet : www.DataSheet4U.com )
PRELIMINARY INFORMATION
ICS650-11B
BroadCom Networking Clock Synthesizer
Description
The ICS650-11B is a low cost, low jitter, high
performance clock synthesizer customized for
BroadCom. Using analog Phase-Locked Loop
(PLL) techniques, the device accepts a 25.0 MHz
clock or fundamental mode crystal input to
produce multiple output clocks of 25.0 MHz,
33.33 MHz, 66.66 MHz, 100.0 MHz, and
133.33 MHz. All output clocks are frequency
locked together. The ICS650-11B outputs all
have 0 ppm synthesis error.
Features
• Packaged in 20 pin narrow SSOP (Pb free available)
• 25.00 MHz fundamental crystal or clock input
• Five fixed output clocks of 25.0 MHz, 33.33 MHz,
66.66 MHz, 100.0 MHz, and 133.33 MHz
• Zero ppm synthesis error in all clocks
• Ideal for BroadCom BCM5600/BCM5400 chipset
• Full CMOS output swing
• Advanced, low power, sub-micron CMOS process
• 3.0V to 5.5V operating voltage
• Industrial temperature range
Block Diagram
VDD GND
35
25.00 MHz
crystal or clock
X1
X2
Clock
Buffer/
Crystal
Oscillator
Clock Synthesis
and Control
Circuitry
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
Output
Buffer
33.33 MHz
66.66 MHz
100.0 MHz
133.33 MHz
25.00 MHz
Optional crystal capacitors are shown and may be required for tuning of initial accuracy (determined once per board).
MDS 650-11B C
1
Revision 012005
Printed 11/14/04
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel• www.icst.com
www.DataSheet4U.com


ICS650R-11B Datasheet
Recommendation ICS650R-11B Datasheet
Part ICS650R-11B
Description BroadCom Networking Clock Synthesizer
Feature ICS650R-11B; ( DataSheet : www.DataSheet4U.com ) PRELIMINARY INFORMATION ICS650-11B BroadCom Networking Clock S.
Manufacture Integrated Circuit Systems
Datasheet
Download ICS650R-11B Datasheet




Integrated Circuit Systems ICS650R-11B
PRELIMINARY INFORMATION
ICS650-11B
BroadCom Networking Clock Synthesizer
Pin Assignment
GND
X2
X1
VDD
GND
GND
DC
DC
DC
100M
1
2
3
4
5
6
7
8
9
10
20 D C
19 D C
18 133.33M
17 33.33M
16 VDD
15 VDD
14 GND
13 25M
12 66.66M
11 GND
20 pin (150 mil) SSOP
Pin Descriptions
Number
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Name
GND
X2
X1
VDD
GND
GND
DC
DC
DC
100M
GND
66.66M
25M
GND
VDD
VDD
33.33M
133.33M
DC
DC
Type
P
XO
XI
P
P
P
-
-
-
O
P
O
O
P
P
P
O
O
-
-
Description
Connect to ground.
Crystal connection. Connect to 25 MHz crystal or leave unconnected for a clock input.
Crystal connection. Connect to 25 MHz fundamental crystal or clock input.
Connect to +3.3 V or +5 V. Must be same as other VDDs.
Connect to ground.
Connect to ground.
Don't Connect. Do not connect anything to this pin.
Don't Connect. Do not connect anything to this pin.
Don't Connect. Do not connect anything to this pin.
100.0 MHz clock output.
Connect to ground.
66.66 MHz clock output.
25.0 MHz clock output.
Connect to ground.
Connect to +3.3V or +5V. Must be same as other VDDs.
Connect to +3.3 V or +5 V. Must be same as other VDDs.
33.33 MHz clock output.
133.33 MHz clock output.
Don't Connect. Do not connect anything to this pin.
Don't Connect. Do not connect an thing to this pin.
Key: XI, XO = crystal connections; O = Output; P = power supply connection
MDS 650-11B C
2
Revision 012005
Printed 11/14/04
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel• www.icst.com



Integrated Circuit Systems ICS650R-11B
PRELIMINARY INFORMATION
ICS650-11B
BroadCom Networking Clock Synthesizer
Electrical Specifications
Parameter
Conditions
ABSOLUTE MAXIMUM RATINGS (note 1)
Minimum Typical Maximum Units
Supply voltage, VDD
Referenced to GND
Inputs and Clock Outputs
Referenced to GND
Ambient Operating Temperature
Soldering Temperature
Max of 20 seconds
Storage temperature
DC CHARACTERISTICS (VDD = 3.3V unless noted)
-0.5
-40
-65
7
VDD+0.5
85
260
150
V
V
°C
°C
°C
Operating Voltage, VDD
Input High Voltage, VIH, X1 pin only
Input Low Voltage, VIL, X1 pin only
Output High Voltage, VOH
IOH=-12mA
Output Low Voltage, VOL
IOL=12mA
Output High Voltage, VOH, CMOS level
IOH=-8mA
Operating Supply Current, IDD
No Load
Short Circuit Current
Each output
AC CHARACTERISTICS (VDD = 3.3V unless noted)
3
VDD/2 + 1
2.4
VDD-0.4
VDD/2
VDD/2
5.5
VDD/2 - 1
0.4
35
±50
V
V
V
V
V
V
mA
mA
Input Frequency
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle, except 25 MHz
Frequency error
Absolute Jitter, short term
0.8 to 2.0V
2.0 to 0.8V
At VDD/2
All clocks
Variation from mean
25.000
MHz
1.5 ns
1.5 ns
45 50 55 %
0 ppm
175 ps
Notes: 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
The ICS650-11B requires a minimum number of external components for proper operation. Decoupling
capacitors of 0.01µF should be connected between each VDD and GND on Pins 4 and 6, and Pins 16 and
14, as close to the ICS650-11B as possible. A series termination resistor of 33 may be used for each clock
output. The 25.00 MHz crystal must be connected as close to the chip as possible. The crystal should be a
fundamental mode (do not use third overtone), parallel resonant. Crystal capacitors should be connected
from pins X1 to ground and X2 to ground to optimize the initial accuracy. The value of these capacitors is
given by the following equation, where CL is the crystal load capacitance: Crystal caps (pF) = (CL-6) x 2. So
for a crystal with 16 pF load capacitance, two 20 pF caps should be used.
MDS 650-11B C
3
Revision 012005
Printed 11/14/04
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126•(408)295-9800tel• www.icst.com







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