GENERAL DESCRIPTION

The 843023 is a Gigabit Ethernet Clock Generator and a member of

the HiPerClocksTM family of high performance devices from IDT. The

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

has excellent phase jitter performance, over the 1.875MHz – 20MHz

integration range. The 843023 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 25MHz,

18pF parallel resonant crystal

• Output frequencies: 245MHz – 320MHz

• VCO range: 490MHz - 640MHz

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

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

Offset Noise Power

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

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

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

100kHz .................-126 dBc/Hz

• 3.3V operating supply

• 0°C to 70°C ambient operating temperature

• Available in lead-free (RoHS 6) package