GENERAL DESCRIPTION

The 843251I-12 is a 10Gb Ethernet Clock Generator. The 843251I12 uses an 18pF parallel resonant crystal over the range of 23.2MHz

- 30MHz. For Ethernet applications, a 25MHz crystal is used.

The 843251I-12 uses IDT’s 3rd generation low phase noise VCO

technology, and can achieve <1ps rms phase jitter performance

over the 1.875MHz - 20MHz integration range. The 843251I-12 is

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

with limited board space.

FEATURES

• One Differential LVPECL output

• Crystal oscillator interface, 18pF parallel resonant crystal

(23.2MHz - 30MHz)

• Output frequency range: 290MHz - 750MHz

• VCO range: 580MHz - 750MHz

• RMS phase jitter @ 312.5MHz, using a 25MHz crystal

(1.875MHz - 20MHz): 0.36ps (typical)

• 3.3V or 2.5V operating supply

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

• Available in lead-free (RoHS 6) package