GENERAL DESCRIPTION

The 843023I is a Gigabit Ethernet Clock Generator and a member of the HiPerClocksTM family of high performance devices from

IDT. The 843023I uses a 25MHz crystal to synthesize 250MHz.

The 843023I has excellent phase jitter performance, over the

1.875MHz – 20MHz integration range. The 843023I is packaged

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

limited board space.

FEATURES

• One differential 3.3V or 2.5V LVPECL output

• Crystal oscillator interface designed for 25MHz,

18pF parallel resonant crystal

• Output frequency range: 240MHz - 320MHz

• VCO range: 480MHz - 640MHz

• RMS phase jitter @ 250MHz, using a 25MHz crystal

(1.875MHz - 20MHz): 0.39ps (typical)

Phase noise:

Offset Noise Power

100Hz ..................-86.3 dBc/Hz

1kHz ................-114.6 dBc/Hz

10kHz ................-125.6 dBc/Hz

100kHz ................-126.0 dBc/Hz

• Full 3.3V and 2.5V operating supply

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

• Available in lead-free (RoHS 6) package