ics501倍频芯片.pdfVIP

ICS501 LOCO™ PLL CLOCK MULTIPLIER Description Features The ICS501 LOCOTM is the most cost effective way to • Packaged as 8-pin SOIC or die generate a high-quality, high-frequency clock output • Available in Pb (lead) free package from a lower frequency crystal or clock input. The name • ICS’ lowest cost PLL clock LOCO stands for Low Cost Oscillator, as it is designed • Zero ppm multiplication error to replace crystal oscillators in most electronic systems. Using Phase-Locked Loop (PLL) techniques, • Input crystal frequency of 5 - 27 MHz the device uses a standard fundamental mode, • Input clock frequency of 2 - 50 MHz inexpensive crystal to produce output clocks up to 160 • Output clock frequencies up to 160 MHz MHz. • Extremely low jitter of 25 ps (one sigma) Stored in the chip’s ROM is the ability to generate nine • Compatible with all popular CPUs different multiplication factors, allowing one chip to • Duty cycle of 45/55 up to 160 MHz output many common frequencies (see table on page • Nine selectable frequencies 2). • Operating voltage of 3.3V or 5.5V The device also has an output enable pin which • Tri-state output for board level testing tri-states the clock output when the OE pin is taken low. • 25mA drive capability at TTL levels This product is intended for clock generation. It has low • Ideal for oscillator replacement output jitter (variation in the output period), but input to • Industrial tempe