ICS840-77

PRELIMINARY Integrated Circuit Systems, Inc. ICS840-77 77.76MHZ, LVCMOS/LVTTL OSCILLATOR REPLACEMENT FEATURES One LVCMOS/LVTTL output, 15Ω output impedence Crystal oscillator interface designed for 19.44MHz, 18pF parallel resonant crystal Output frequency: 77.76MHz Random jitter: 2.82ps (typical) Deterministic jitter: 0.205ps (typical) 3.3V operating supply 0°C to 70°C ambient operating temperature Available in both standard and lead-free RoHS-compliant packages GENERAL DESCRIPTION The ICS840-77 is a SONET Oscillator Replacement and a member of the HiPerClocks TM HiPerClockS™ family of high performance devices from ICS. The ICS840-77 uses a 19.44MHz crystal to synthesize 77.76MHz. The ICS840-77 has excellent jitter performance. The ICS840-77 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. IC S www.DataSheet4U.com BLOCK DIAGRAM OE Pullup 77.76MHz 19.44MHz PIN ASSIGNMENT Q0 VDD XTAL_OUT XTAL_IN OE 1 2 3 4 8 7 6 5 Q1 Q0 VDDO GND XTAL_IN Clock Synthesizer Q1 ICS840-77 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View XTAL_OUT ICS840-77 8-Lead SOIC 3.90mm x 4.92mm x 1.37mm body package M Package Top View The Preliminary Information presented herein represents a product in prototyping or pre-production. The noted characteristics are based on initial product characterization. Integrated Circuit Systems, Incorporated (ICS) reserves the right to change any circuitry or specifications witho...