Micrel – SY75576L: PCIe Gen 1, 2, 3 HCSL Fanout Buffer



The SY75576L is a high speed, fully differential 1:4 clock fanout buffer optimized to provide four identical output copies with 137fs phase jitter and maximum 50ps output-to-output skew. Designed to be used with PCI-Express applications, SY75576L accepts and outputs HCSL or LVDS logic levels. The SY75576L operates from a 3.3V ±5% power supply and is guaranteed over the full industrial temperature range (-40°C to +85°C). It is available in a 20-pin TSSOP lead-free package.


  • Four differential pairs of LVDS or HCSL outputs
  • 267MHz HCSL frequency
  • 137fsRMS, 200MHz (12kHz to 20MHz) phase jitter
  • <50ps output-to-output skew
  • 3.3V ±5% power supply operation
  • Two pairs of differential inputs accept LVDS or HCSL logic levels
  • 100MHz LVDS frequency
  • 2ps total Jitter (pk-pk), 200MHz (BER = 10-12)
  • -40°C to +85°C operating temperature
  • 20-pin TSSOP lead-free package