ICS512

ICS512 LOCO™ PLL Clock Multiplier Description The ICS512 LOCO™ is the most cost effective way to generate a high quality, high frequency clock output and a reference clock from a lower frequency crystal or clock input. The name LOCO stands for LOw Cost Oscillator, as it is designed to replace crystal oscillators in most electronic systems. Using Phase-Locked-Loop (PLL) techniques, the device uses a standard fundamental mode, inexpensive crystal to produce output clocks up to 200 MHz. With a reference output, this chip plus an inexpensive crystal can replace two oscillators. Stored in the chip’s ROM is the ability to generate nine different popular multiplication factors, allowing one chip to output many common frequencies (see page 2). Features Packaged as 8 pin SOIC or die Upgrade of popular ICS502 with: - changed multiplier table - higher operating frequencies Zero ppm multiplication error Easy to cascade with other 5xx series Input crystal frequency of 5 - 27 MHz Input clock frequency of 2 - 50 MHz Output clock frequencies up to 200 MHz Compatible with all popular CPUs Duty cycle of 45/55 up to 200 MHz Mask option for 9 selectable frequencies Operating voltages of 3.0 to 5.5V Industrial temperature version available Advanced, low power CMOS process Block Diagram VDD GND S1, S0 2 PLL Clock Synthesis and Control Circuitry Output Buffer CLK Crystal or clock input X1/ICLK Crystal Oscillator X2 Output Buffer REF Optional crystal capacitors ...