FemtoClock Crystal-to-3.3V LVPECL 843011 Clock Generator DATA SHEET GENERAL DESCRIPTION FEATURES The 843011 is a Fibre Channel Clock Generator. One differential 3.3V LVPECL output The 843011 uses a 26.5625MHz crystal to synthesize Crystal oscillator interface designed for 26.5625MHz 106.25MHz or a 25MHz crystal to synthesize 100MHz. The 18pF parallel resonant crystal 843011 has excellent <1ps phase jitter performance, over the 637kHz 10MHz integration range. The 843011 is packaged Output frequency: 106.25MHz or 100MHz in a small 8-pin TSSOP, making it ideal for use in systems with VCO range: 560MHz - 680MHz limited board space. RMS phase jitter 100MHz, using a 25MHz crystal (637kHz - 10MHz): 0.80ps (typical) RMS phase noise at 106.25MHz Phase noise: Offset Noise Power 100Hz ................-92.8 dBc/Hz 1kHz ..............-119.6 dBc/Hz 10kHz ..............-129.5 dBc/Hz 100kHz ..............-130.5 dBc/Hz 3.3V operating supply Available in lead-free (RoHS 6) package -40C to 85C ambient operating temperature FREQUENCY TABLE Crystal (MHz) Output Frequency (MHz) 26.5625 106.25 25 100 BLOCK DIAGRAM PIN ASSIGNMENT 1 8 VCCA VCC VCO XTAL IN nQ0 Phase 2 7 VEE Q0 OSC 6 Detector 637.5MHz w/ Q0 XTAL OUT 3 6 nQ0 XTAL OUT 26.5625MHz Ref. 4 5 XTAL IN nc 843011 M = 24 (fixed) 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View 843011 REVISION B 9/25/15 1 2015 Integrated Device Technology, Inc.843011 DATA SHEET TABLE 1. PIN DESCRIPTIONS Number Name Type Description 1V Power Analog supply pin. CCA 2V Power Negative supply pin. EE 3, XTAL OUT, Crystal oscillator interface. XTAL IN is the input, Input 4 XTAL IN XTAL OUT is the output. 5 nc Unused No connect. 6, 7 nQ0, Q0 Output Differential clock outputs. LVPECL interface levels. 8V Power Core supply pin. CC TABLE 2. PIN CHARACTERISTICS Symbol Parameter Test Conditions Minimum Typical Maximum Units C Input Capacitance 4 pF IN FEMTOCLOCKS CRYSTAL-TO- 2 REVISION B 9/25/15 3.3V LVPECL CLOCK GENERATOR