ics650-11b Integrated Device Technology, ics650-11b Datasheet - Page 3

• Manufacturer Part Number: ics650-11b
• Description: Broadcom Networking Clock Synthesizer
• Manufacturer: Integrated Device Technology

MDS 650-11B C
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose • CA • 95126•[phone]tel• www.icst.com
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
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 C
for a crystal with 16 pF load capacitance, two 20 pF caps should be used.
Electrical Specifications
External Components
Notes:
Parameter
ABSOLUTE MAXIMUM RATINGS (n n ote 1)
Supply voltage, VDD
Inputs and Clock Outputs
Ambient Operating Temperature
Soldering Temperature
Storage temperature
DC CHARACTERISTICS (VDD = 3.3V V unless noted)
Operating Voltage, VDD
Input High Voltage, VIH, X1 pin only
Input Low Voltage, VIL, X1 pin only
Output High Voltage, VOH
Output Low Voltage, VOL
Output High Voltage, VOH, CMOS level
Operating Supply Current, IDD
Short Circuit Current
AC CHARACTERISTICS (VDD = 3.3V V unless noted)
Input Frequency
Output Clock Rise Time
Output Clock Fall Time
Output Clock Duty Cycle, except 25 MHz
Frequency error
Absolute Jitter, short term
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.
PRELIMINARY INFORMATION
L
BroadCom Networking Clock Synthesizer
Conditions
Referenced to GND
Referenced to GND
Max of 20 seconds
IOH=-12mA
IOL=12mA
IOH=-8mA
No Load
Each output
0.8 to 2.0V
2.0 to 0.8V
At VDD/2
All clocks
Variation from mean
is the crystal load capacitance: Crystal caps (pF) = (C
3
VDD/2 + 1
Minimum
VDD-0.4
-0.5
-40
-65
2.4
45
3
Revision 012005
Typical
VDD/2
VDD/2
25.000
may be used for each clock
±50
175
35
50
VDD/2 - 1
Maximum
VDD+0.5
ICS650-11B
260
150
5.5
0.4
1.5
1.5
85
55
7
0
L
-6) x 2. So
Printed 11/14/04
Units
M H z
ppm
mA
mA
°C
°C
°C
%
V
V
V
V
V
V
V
V
ns
ns
ps