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ICS507-01
PECL CLOCK SYNTHESIZER
PECL MULTIPLIER
IDT / ICS PECL CLOCK SYNTHESIZER
3
ICS507-01
REV I 041905
External Component Selection
The ICS507-01 requires a minimum number of external
components for proper operation.
Decoupling Capacitors
Decoupling capacitors of 0.01
F should be connected
between VDD and GND on pins 2 and 5, as close to the
ICS507-01 as possible. Other VDD and GND
connections should be connected to those pins, or to
the VDD and GND planes on the board. A resistor must
be connected between the RES (pin 10) and VDD.
Another four resistors are needed for the PECL outputs
as shown on the block diagram on page 1. Suggested
values of these resistors are shown in the Block
Diagram, but they can be varied to change the
differential pair output swing, and the DC level; refer to
MAN09.
High Frequency Differential PECl Oscillators
The ICS507-01 plus a low frequency, fundamental
mode crystal can build a high frequency differential
output oscillator. For example, a 10 MHz crystal
connected to the ICS507-01 with the 12X output
selected (S1=0, S0=1) produces a 120 MHz PECL
output clock.
Hi Frequency TCXO
Extending the previous application, an inexpensive, low
frequency TCXO can be built and the output frequency
can be multiplied using the ICS507-01. Since the output
of the chip is phase-locked to the input, the ICS507-01
has no temperature dependence, and the temperature
coefficient of the combined system is the same as that
of the low frequency TCXO.
Hi Frequency VCXO
The bandwidth of the PLL is guaranteed to be greater
than 10 kHz. This means that the PLL will track any
modulation on the input with a frequency of less than 10
kHz. By using this property, a low frequency VCXO can
be built, and the output can then be multiplied with the
ICS507-01 to give a high frequency output, thereby
producing a high frequency VCXO.
Absolute Maximum Ratings
Stresses above the ratings listed below can cause permanent damage to the ICS507-01. 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
7 V
All Inputs and Outputs
-0.5 V to VDD+0.5 V
Ambient Operating Temperature (commercial)
0 to +70
° C
Ambient Operating Temperature (industrial)
-40 to +85
° C
Storage Temperature
-65 to +150
° C
Soldering Temperature
260
° C
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