ICS951413CGLF IDT, Integrated Device Technology Inc, ICS951413CGLF Datasheet - Page 21

• Manufacturer Part Number: ICS951413CGLF
• Description: IC SYSTEM CLOCK CHIP P4 56-TSSOP
• Manufacturer: IDT, Integrated Device Technology Inc
• Type: Clock/Frequency Synthesizerr

Specifications of ICS951413CGLF

• Input: Crystal
• Output: Clock
• Frequency - Max: 400MHz
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 56-TSSOP
• Frequency-max: 400MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 951413CGLF

Shared Pin Operation -
Input/Output Pins
The I/O pins designated by (input/output) on the ICS951416
serve as dual signal functions to the device. During initial
power-up, they act as input pins. The logic level (voltage)
that is present on these pins at this time is read and stored
into a 5-bit internal data latch. At the end of Power-On reset,
(see AC characteristics for timing values), the device
changes the mode of operations for these pins to an output
function. In this mode the pins produce the specified buffered
clocks to external loads.
To program (load) the internal configuration register for
these pins, a resistor is connected to either the VDD (logic 1)
power supply or the GND (logic 0) voltage potential. A 10
Kilohm (10K) resistor is used to provide both the solid CMOS
programming voltage needed during the power-up
programming period and to provide an insignificant load on
the output clock during the subsequent operating period.
Figure 1 shows a means of implementing this function when
a switch or 2 pin header is used. With no jumper is installed
0929D—10/30/06
Integrated
Circuit
Systems, Inc.
Device
Pad
Programming
Header
Via to Gnd
Series Term. Res.
Fig. 1
21
the pin will be pulled high. With the jumper in place the pin
will be pulled low. If programmability is not necessary, than
only a single resistor is necessary. The programming
resistors should be located close to the series termination
resistor to minimize the current loop area. It is more important
to locate the series termination resistor close to the driver
than the programming resistor.
8.2K
2K
Clock trace to load
Via to
VDD
ICS951413