DATASHEET LOCO PLL CLOCK MULTIPLIER ICS512 Description Features The ICS512 is the most cost effective way to generate Packaged as 8-pin SOIC or die a high-quality, high frequency clock output and a Pb (lead ) free package reference clock from a lower frequency crystal or clock Upgrade of popular ICS502 with: input. The name LOCO stands for Low Cost Oscillator, as it is designed to replace crystal oscillators in most changed multiplier table electronic systems. Using Phase-Locked-Loop (PLL) higher operating frequncies techniques, the device uses a standard fundamental mode, inexpensive crystal to produce output clocks up Zero ppm multiplication error to 200 MHz. With a reference output, this chip plus an Easy to cascade with other 5xx series inexpensive crystal can replace two oscillators Input crystal frequency of 5 - 27 MHz Stored in the chips ROM is the ability to generate nine Input clock frequency of 2 - 50 MHz different multiplication factors, allowing one chip to output many common frequencies (see table on page Output clock frequencies up to 200 MHz 2). Compatible with all popular CPUs This product is intended for clock generation. It has low Duty cycle of 45/55 up to 200 MHz output jitter (variation in the output period), but input to Mask option for nine selectable frequencies output skew and jitter are not defined or guaranteed. For applications which require defined input to output Operating voltages of 3.0 to 5.5 V skew, use the ICS570B. Industrial temperature version available Advanced, low power CMOS process Block Diagram VDD PLL Clock CLK Synthesis 2 S1, S0 and Control Circuitry X1/ICLK Crystal or Crystal Clock input REF Oscillator X2 Optional crystal GND capacitors IDT / ICS LOCO PLL CLOCK MULTIPLIER 1 ICS512 REV H 051310ICS512 LOCO PLL CLOCK MULTIPLIER CLOCKMULTIPLIER Pin Assignment Clock Output Table S1 S0 CLK X1/ICLK 1 8 X2 00 4X input VDD 2 7 S1 0 M 5.333X input GND 3 6 S0 01 5X input M 0 2.5X input REF 4 5 CLK MM 2X input 8-pin (150 mil) SOIC M 1 3.333X input 10 6X input 1M 3X input 11 8X input 0 = connect directly to ground 1 = connect directly to VDD M = leave unconnected (floating) Common Output Frequencies Example (MHz) Output 20 24 30 32 33.33 37.5 40 48 50 60 64 Input 10 12 10 16 16.66 15 10 12 20 10 16 Selection (S1, S0) M,M M,M 1, M M,M M,M M,0 0,0 0,0 M,0 1,0 0,0 Output 66.66 72 75 80 83.33 90 100 120 125 133.3 150 Input 20 12 25 10 25 15 20 15 25 25 25 Selection (S1, S0) M,1 1,0 1,M 1,1 M,1 1,0 0,1 1,1 0,1 0,M 1,0 Note that all of the above are achieved using a common, inexpensive 10 MHz to 25 MHz crystal. Consult IDT on how to achieve other output frequncies. IDT / ICS LOCO PLL CLOCK MULTIPLIER 2 ICS512 REV H 051310