DATASHEET SERIALLY PROGRAMMABLE CLOCK SOURCE ICS307-01/-02 Description Features The ICS307-01 and ICS307-02 are versatile serially Packaged in 16-pin (150 mil wide) SOIC Pb-free, programmable clock sources which take up very little RoHS compliant board space. They can generate any frequency from 6 Highly accurate frequency generation to 200 MHz and have a second configurable output. Serially programmable: user determines the output The outputs can be reprogrammed on the fly and will frequency via a 3 wire interface lock to a new frequency in 10 ms or less. Smooth transitions (in which the clock duty cycle remains near Eliminates need for custom quartz 50%) are guaranteed if the output divider is not Input crystal frequency of 5 - 27 MHz changed. Output clock frequencies up to 200 MHz The devices includes a PDTS pin which tri-states the Power down tri-state mode output clocks and powers down the entire chip. Very low jitter The ICS307-02 features a default clock output at Operating voltage of 3.3 V or 5 V start-up and is recommended for all new designs. 25 mA drive capability at TTL levels This product is intended for clock generation. It has low output jitter (variation in the output period), but input to Industrial temperature version available output skew and jitter are not defined nor guaranteed. For applications which require defined input to output skew, use the ICS527-01. Block Diagram VDD TTL V8:V0 9 SCLK 2 C1:C0 Shift DATA 3 Register S2:S0 2 STROBE F1:F0 VCO 7 Divider R6:R7 CLK1 X1/ICLK Phase Comparator, Crystal Reference Output Charge Pump, and VCO PDTS Oscillator Divider Divider Crystal or Loop Filter Function X2 clock input CLK2 Select 3 3 Optional crystal capacitors S2:S0 F1:F0 GND IDT / ICS SERIALLY PROGRAMMABLE CLOCK SOURCE 1 ICS307-01/-02 REV J 051310ICS307-01/-02 SERIALLY PROGRAMMABLE CLOCK SOURCE SER PROG CLOCK SYNTHESIZER Pin Assignment X1/ICLK 1 16 X2 NC 2 15 NC VDD 3 14 NC NC 4 13 PDTS GND 5 12 DATA CLK2 6 11 CLK1 NC 7 10 NC SCLK 8 9 STROBE 16 pin (150 mil) SOIC Pin Descriptions Pin Pin Pin Pin Description Number Name Type Crystal connection (REF frequency). Connect to a parallel resonant crystal or an 1 X1/ICLK XI input clock. 2 NC - No connect. Do not connect anything to this pin. 3 VDD Power Connect to 3.3 V or 5 V. 4 NC - No connect. Do not connect anything to this pin. 5 GND Power Connect to ground. 6 CLK2 Output Output clock 2, determined by F0 - F1. Can be reference, REF/2, CLK1/2 , or off. 7 NC - No connect. Do not connect anything to this pin. 8 SCLK Input Serial clock. See timing diagram. 9 STROBE Input Strobe to load data. See timing diagram. 10 NC - No connect. Do not connect anything to this pin. 11 CLK1 Output Output clock 1, determined by R0 - R6, V0 - V8, S0 - S2, and input frequency. 12 DATA Input Data input. Serial input for three words which set the output clock(s). Powers down entire chip, tri states CLK1 and CLK2 outputs when low. Internal 13 PDTS Input pull-up. 14 NC - No connect. Do not connect anything to this pin. 15 NC - No connect. Do not connect anything to this pin. Input crystal connection. Connect to a crystal or leave unconnected for clock 16 X2 XO input. IDT / ICS SERIALLY PROGRAMMABLE CLOCK SOURCE 2 ICS307-01/-02 REV J 051310