General Description

The ICS843021I is a Gigabit Ethernet Clock Generator. The

ICS84302I uses a 25MHz crystal to synthesize 125MHz. The

ICS843021I has excellent phase jitter performance, over the

1.875MHz – 20MHz integration range. The ICS843021I is packaged

in a small 8-pin TSSOP, making it ideal for use in systems with

limited board space.

Features

• One differential 3.3V LVPECL output

• Crystal oscillator interface designed for 22.4MHz – 28MHz, 18pF

parallel resonant crystal

• Output frequency range: 112MHz – 140MHz

• VCO range: 560MHz – 700MHz

• Output duty cycle range: 49 – 51

• RMS phase jitter at 125MHz, using a 25MHz crystal

(1.875MHz – 20MHz): 0.650ps (typical)

Offset Noise Power

100Hz..............-94.2 dBc/Hz

1kHz..............-122.8 dBc/Hz

10kHz..............-132.2 dBc/Hz

100kHz..............-131.3 dBc/Hz

• Full 3.3V supply mode

• -40°C to 85°C ambient operating temperature

• Available in lead-free (RoHS 6) package