ICS270

PRELIMINARY INFORMATION ICS270 Triple PLL Field Programmable VCXO Clock Synthesizer Description The ICS270 field programmable VCXO clock synthesizer generates up to eight high-quality, high-frequency clock outputs including multiple reference clocks from a low-frequency crystal input. It is designed to replace crystals and crystal oscillators in most electronic systems. Using ICS’ VersaClockTM software to configure PLLs and outputs, the ICS270 contains a One-Time Programmable (OTP) ROM for field programmability. Programming features include VCXO, eight selectable configuration registers and up to two sets of four low-skew outputs. Using Phase-Locked Loop (PLL) techniques, the device runs from a standard fundamental mode, inexpensive crystal, or clock. It can replace VCXOs, multiple crystals and oscillators, saving board space and cost. The ICS270 is also available in factory programmed custom versions for high-volume applications. Features Packaged as 20-pin TSSOP Eight addressable registers Replaces multiple crystals and oscillators Output frequencies up to 200 MHz at 3.3 V Input crystal frequency of 5 to 27 MHz Up to eight reference outputs Up to two sets of four low-skew outputs Operating voltages of 3.3 V Controllable output drive levels Advanced, low-power CMOS process Available in Pb (lead) free packaging Block Diagram VDD 3 S2:S0 3 OTP ROM with PLL Values CLK1 PLL1 CLK2 Divide Logic and Output Enable Control CLK3 CLK4 CLK5 CLK6 CLK7 CLK8 ...