ICS840021 Description
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.
ICS840021 Key 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