VOIP Clock Source
( DataSheet : www.DataSheet4U.com )
ICS651-03
VOIP Clock Source
Description
The ICS651-03 is a low cost frequency gener...
Description
( DataSheet : www.DataSheet4U.com )
ICS651-03
VOIP Clock Source
Description
The ICS651-03 is a low cost frequency generator designed to support voice-over-internet protocol (VOIP) applications. Using analog/digital Phase-Locked Loop (PLL) techniques, the device uses a standard fundamental mode, inexpensive crystal input to produce four output clocks supporting DSP, video encoder, and memory functions. To form a complete VOIP clocking solution use the ICS651-02 companion device. The device also has a power down feature that tri-states the clock outputs and turns off the PLL when the PDTS pin is taken low.
Features
Packaged in 16-pin TSSOP Replaces multiple crystals and oscillators Input crystal or clock frequency of 27 MHz Fixed reference output frequency of 80 MHz Fixed output frequency of 48 MHz Fixed output frequency of 25 MHz Reference output frequency of 27 MHz Duty cycle of 40/60 Operating voltage of 3.3 V Advanced, low power CMOS process
Block Diagram
VDD 6
PLL1
80M
PLL2
48M
25M 27 MHz crystal input X1 Crystal Oscillator/ Clock Buffer REF
X2
External capacitors may be required.
3 GND PDTS
(all outputs and PLLs)
MDS 651-03 A Integrated Circuit Systems
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Revision 112603 tel (40 8) 297-1 201 ● w w w. i c s t. c o m
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ICS651-03 VOIP Clock Source
Pin Assignment
X1 GND PDTS 25M GND VDD VDD 48M 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 X2 VDD REF VDD VDD VDD GND 80M
16-pin (173 mi...
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