GENERAL DESCRIPTION

The 840051I is a Gigabit Ethernet Clock Generator and a

member of the HiPerClocksTM family of high performance

devices from ICS. The 840051I can synthesize 10 Gigabit

Ethernet, SONET, or Serial ATA reference clock fre-quencies

with the appropriate choice of crystal and output divider. The

840051I has excellent phase jitter performance and is packaged

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

limited board space.

FEATURES

• 1 LVCMOS/LVTTL output, 15Ω output impedance

• Crystal oscillator interface designed for

18pF parallel resonant crystals

• Output frequency range: 70MHz - 170MHz

• VCO range: 560MHz - 680MHz

• RMS phase jitter at 155.52MHz (1.875MHz - 20MHz):

0.48ps (typical)

• RMS phase noise at 155.52MHz

Offset Noise Power

100Hz ................-99.7 dBc/Hz

1KHz .................-120 dBc/Hz

10KHz .................-128 dBc/Hz

100KHz .................-127 dBc/Hz

• 3.3V or 2.5V operating supply

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

• Lead-Free fully RoHS compliant

• Not Recommended For New Designs

• For drop in replacement part use 840N051i