ICS501

LOCO™ PLL CLOCK MULTIPLIER

CLOCK MULTIPLIER

IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER

3

ICS501

REV R 051310

External Components

Decoupling Capacitor

As with any high-performance mixed-signal IC, the ICS501

must be isolated from system power supply noise to perform

optimally.

A decoupling capacitor of 0.01µF must be connected

between VDD and the GND. It must be connected close to

the ICS501 to minimize lead inductance. No external power

supply filtering is required for the ICS501.

Series Termination Resistor

A 33

Ω terminating resistor can be used next to the CLK pin

for trace lengths over one inch.

Crystal Load Capacitors

The total on-chip capacitance is approximately 12 pF. A

parallel resonant, fundamental mode crystal should be

used. The device crystal connections should include pads

for small capacitors from X1 to ground and from X2 to

ground. These capacitors are used to adjust the stray

capacitance of the board to match the nominally required

crystal load capacitance. Because load capacitance can

only be increased in this trimming process, it is important to

keep stray capacitance to a minimum by using very short

PCB traces (and no vias) between the crystal and device.

Crystal capacitors, if needed, must be connected from each

of the pins X1 and X2 to ground.

Example: For a crystal with a 16 pF load capacitance, each

crystal capacitor would be 8 pF [(16-12) x 2 = 8].

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the ICS501. These ratings, which are

standard values for IDT 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.

Recommended Operation Conditions

Item

Rating

Supply Voltage, VDD

7 V

All Inputs and Outputs

-0.5 V to VDD+0.5 V

Ambient Operating Temperature

-40 to +85

° C

Storage Temperature

-65 to +150

° C

Soldering Temperature

260

° C

Parameter

Min.

Typ.

Max.

Units

Ambient Operating Temperature (commercial)

0

+70

° C

Ambient Operating Temperature (industrial)

-40

85

° C

Power Supply Voltage (measured in respect to GND)

+3.0

+5.25

V