ICS651-03

( 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 ● 1 525 Ra ce St reet, Sa n Jose, C A 9 5126 ● Revision 112603 tel (40 8) 297-1 201 ● w w w. i c s t. c o m www.DataSheet4U.com 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...