MDS 411 C

3

Revision 062005

www.icst.com

ICS411

External Components

Series Termination Resistor

Clock output traces over one inch should use series

termination. To series terminate a 50

Ω trace (a

commonly used trace impedance), place a 33

Ω resistor

in series with the clock line, as close to the clock output

pin as possible. The nominal impedance of the clock

output is 20

Ω.

Decoupling Capacitor

As with any high performance mixed-signal IC, the

ICS411 must be isolated from system power supply

noise to perform optimally.

Decoupling capacitors of 0.01µF must be connected

between each VDD pin and the PCB ground plane.

PCB Layout Recommendations

For optimum device performance and lowest output

phase noise, the following guidelines should be

observed.

1) 0.01µF decoupling capacitors should be mounted on

the component side of the board as close to the VDD

pin as possible. No vias should be used between

decoupling capacitor and VDD pin. The PCB trace to

VDD pin should be kept as short as possible, as should

the PCB trace to the ground via.

2) To minimize EMI the 33

Ω series termination resistor,

if needed, should be placed close to the clock output.

3) An optimum layout is one with all components on the

same side of the board, minimizing vias through other

signal layers. Other signal traces should be routed

away from the ICS411. This includes signal traces just

underneath the device, or on layers adjacent to the

ground plane layer used by the device.

Absolute Maximum Ratings

Stresses above the ratings listed below can cause permanent damage to the ICS411. 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.

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

0 to +70

°C

Storage Temperature

-65 to +150

°C

Junction Temperature

125

°C

Soldering Temperature

260

°C

Parameter

Min.

Typ.

Max.

Units

Ambient Operating Temperature

0

–

+70

°C

Power Supply Voltage (measured in respect to GND)

+3.00

+3.60

V