ICS844001-21

www.DataSheet4U.com PRELIMINARY FEMTOCLOCKS™ CRYSTAL-TO-LVDS FREQUENCY SYNTHESIZER ICS844001-21 GENERAL DESCRIPTION The ICS844001-21 is a a highly versatile, low IC S phase noise LVDS Synthesizer which can generate HiPerClockS™ low jitter reference clocks for a var iety of communications applications and is a member of the HiPerClocksTM family of high performance clock solutions from IDT. The dual crystal interface allows the synthesizer to support up to two communications standards in a given application (i.e. 1GB Ethernet with a 25MHz crystal and 1Gb Fibre Channel using a 25.5625MHz crystal). The rms phase jitter performance is typically less than 1ps, thus making the device acceptable for use in demanding applications such as OC48 SONET and 10Gb Ethernet. The ICS844001-21 is packaged in a small 24-pin TSSOP package. FEATURES One differential LVDS output pair and one LVCMOS reference output Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input VCO range: 560MHz - 700MHz Supports the following applications: SONET, Ethernet, Fibre Channel, Serial ATA, and HDTV RMS phase jitter @ 622.08MHz (12kHz - 20MHz): 0.92ps (typical) Full 3.3V supply mode 0°C to 70°C ambient operating temperature Available in both standard (RoHS 5) and lead-free (RoHS 6) packages BLOCK DIAGRAM 3 N2:N0 SEL0 Pulldown SEL1 Pulldown N XTAL_IN0 000 001 010 011 100 101 110 111 ÷1 ÷2 ÷3 ÷4 (default) ÷5 ÷6 ÷8 ÷10 PIN ASSIGNMENT VDDO_CMOS N0 N1 N2 VDDO_LVDS Q0 Q nQ0 GND...