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PRELIMINARY
Integrated Circuit Systems, Inc.
ICS843034-01
FEMTOCLOCKS™ MULTI-RATE LVPECL FREQUENCY SYNTHESIZER
FEATURES
• Dual differential 3.3V LVPECL outputs which can be set independently for either 3.3V or 2.5V • 4:1 Input Mux: 1 differential input 1 single-ended input 2 crystal oscillator interfaces • CLK, nCLK pair can accept the following differential input levels: LVPECL, LVDS, LVHSTL, HCSL, SSTL • TEST_CLK accepts LVCMOS or LVTTL input levels • Output frequency range: 30.625MHz to 640MHz • Crystal input frequency range: 12MHz to 40MHz • VCO range: 490MHz to 640MHz • Parallel or serial interface for programming feedback divider and output dividers • RMS phase jitter at 106.25MHz, using a 25.5MHz crystal (637kHz to 5MHz): 0.