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ICS251PM Datasheet(PDF) 1 Page - Integrated Device Technology |
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ICS251PM Datasheet(HTML) 1 Page - Integrated Device Technology |
1 / 10 page DATASHEET FIELD PROGRAMMABLE SS VERSACLOCK SYNTHESIZER ICS251 IDT™ / ICS™ FIELD PROGRAMMABLE SS VERSACLOCK SYNTHESIZER 1 ICS251 REV B 061306 Description The ICS251 is a low cost, single-output, field programmable clock synthesizer. The ICS251 can generate an output frequency from 314 kHz to 200 MHz and may employ Spread Spectrum techniques to reduce system electro-magnetic interference (EMI). Using ICS’ VersaClock™software to configure the PLL and output, the ICS251 contains a One-Time Programmable (OTP) ROM to allow field programmability. Programming features include 4 selectable configuration registers. The device employs Phase-Locked Loop (PLL) techniques to run from a standard fundamental mode, inexpensive crystal, or clock. It can replace multiple crystals and oscillators, saving board space and cost. The device also has a power-down feature that tri-states the clock outputs and turns off the PLLs when the PDTS pin is taken low. The ICS251 is also available in factory programmed custom versions for high-volume applications. Features • 8-pin SOIC package • Four addressable registers • Input crystal frequency of 5 to 27 MHz • Clock input frequency of 3 to 150 MHz • Output clock frequencies up to 200 MHz • Configurable Spread Spectrum Modulation • Operating voltage of 3.3 V • Replaces multiple crystals and oscillators • Controllable output drive levels • Advanced, low-power CMOS process • Available in RoHS compliant packaging Block Diagram Crystal Oscillator PLL Clock Synthesis, Spred Spectrum and Control Circuitry CLK PDTS (output and PLL) OTP ROM with PLL Divider Values S1:0 2 VDD GND X2 Crystal or clock input External capacitors are required with a crystal input. X1/ICLK |
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