840022I-02

FemtoClock® Crystal-to-LVCMOS/LVTTL ICS840022I-02 Clock Generator DATA SHEET General Description The ICS840022I-02 is a Gigabit Ethernet Clock Generator. The ICS840022I-02 uses a 25MHz crystal to synthesize 125MHz or 62.5MHz. The ICS840022I-02 has excellent phase jitter performance, over the 12kHz – 20MHz integration range. The ICS840022I-02 is packaged in a small 16-pin VFQFN, making it ideal for use in systems with limited board space. Features One LVCMOS/LVTTL outputs, 20 output impedance Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal Output frequencies: 125MHz or 62.5MHz RMS phase jitter at 125MHz using a 25MHz crystal (12kHz - 20MHz): 0.57ps (typical) Supply modes: Core/Output 3.3V/3.3V 3.3V/2.5V 2.5V/2.5V -40°C to 85°C ambient operating temperature Available in lead-free (RoHS 6) package Function Table Inputs FREQ_SEL 0 1 Output Frequency Range (with a 25MHz crystal) 125MHz 62.5MHz Block Diagram FREQ_SEL Pulldown XTAL_IN 25MHz XTAL_OUT OSC Phase Detector VCO PWR_DN Pullup M = ÷25 (fixed) Pin Assignment VDD nc nc GND 16 15 14 13 PWR_DN 1 12 Q ÷5 0 XTAL_OUT 2 Q XTAL_IN 3 11 nc 10 VDDO ÷10 1 GND 4 9 VDD 5 6 78 GND nc FREQ_SEL GND ICS840022I-02 16 Lead VFQFN Top View ICS840022AKI-02 May 27, 2017 1 ©2017 Integrated Device Technology, Inc. ICS840022I-02 Data Sheet FEMTOCLOCK® CRYSTAL-TO-LVCMOS/LVTTL CLOCK GENERATOR Table 1. Pin Descriptions Number 1 Name PWR_DN Type Input Pullup Descripti...