Integrated Circuit Systems ICS840021
The ICS840021 is a Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM HiPerClockS™ family of high performance devices from ICS. The ICS840021 uses a 25MHz crystal to synthesize 125MHz. The ICS840021 has excellent phase jitter performance, over the 1.875MHz – 20MHz integration range.| Part No. | ICS840021 |
|---|---|
| Datasheet | ICS840021 Download |
| Manufacturer |  Integrated Circuit Systems |
| Description | CRYSTAL-TO LVCMOS/LVTTL FREQUENCY SYNTHESIZER |
| Buy | Stock & Price |
FEATURES
● 1 LVCMOS/LVTTL output, 7Ω output impedence● Crystal oscillator interface designed for 25MHz, 18pF parallel resonant crystal
● Output frequency: 125MHz
● VCO range: 560MHz to 680MHz
● RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.34ps (typical)
● RMS phase noise at 125MHz (typical) Phase noise: Offset Noise Power 100Hz ............... -96.9 dBc/Hz 1KHz .............. -122.2 dBc/Hz 10KHz .............. -131.1 dBc/Hz 100KHz .............. -129.5 dBc/Hz
● 3.3V operating supply
● 0°C to 70°C ambient operating temperature
● Industrial temperature information available upon request
GENERAL DESCRIPTION
The ICS840021 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space. ICS BLOCK DIAGRAM OE 25MHz XTAL_IN PIN ASSIGNMENT VDDA OE XTAL_OUT XTAL_IN 1 2 3 4 8 7 6 5 VDD Q0 GND nc OSC XTAL_OUT Phase Detector VCO ÷5 Q0 ICS840021 ÷25 (fixed) 8-Lead TSSOP 4.40mm x 3.0mm x 0.925mm package body G Package Top View 840021AG 1 REV. A NOVEMBER 30, 2004 Integrated Circuit Systems, Inc.
