ICS650-40 Datasheet, PDF (3/6 Pages) Integrated Circuit Systems – ETHERNET SWITCH CLOCK SOURCE

ICS650-40
ETHERNET SWITCH CLOCK SOURCE
External Components
A minimum number of external components are required for proper operation. Decoupling capacitors of
0.01 µF should be connected between VDD and GND pairs. The capacitors should be placed between pins
VDD and GND, and VDDO and GND, as close to the device as possible. A 33Ω series terminating resistor
should be used on each clock output if the trace is longer than 1 inch. A 25 MHz fundamental mode parallel
resonant crystal should be used with C_L=18 pF.
On chip capacitors. On Chip capacitors are used for a 18 pF load crystal. Small 2 to 3 pf trimming
capacitors are used from pins X1 to ground and X2 to ground to optimize the initial accuracy.
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS650-40. These ratings,
which are standard values for ICS commercially rated parts, are stress ratings only. Functional operation of
the device at these or any other conditions above those indicated in the operational sections of the
specifications is not implied. Exposure to absolute maximum rating conditions for extended periods can
affect product reliability. Electrical parameters are guaranteed only over the recommended operating
temperature range.
Item
Rating
Supply Voltage, VDD
7V
All Inputs and Outputs
-0.5 V to VDD+0.5 V
Ambient Operating Temperature
0 to +70°C
Storage Temperature
-65 to +150°C
Junction Temperature
125°C
Soldering Temperature
260°C
Recommended Operation Conditions
Parameter
Ambient Operating Temperature
Power Supply Voltage (measured in respect to GND)
Min.
0
+3.15
Typ.
Max.
+70
+3.45
Units
°C
V
MDS 650-40 C
3
Revision 060705
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