Low Skew,1:6 Crystal-to- LVCMOS/LVTTL Fanout Buffer

The 83905 is a low skew, 1-to-6 LVCMOS / LVTTL Fanout Buffer. The low impedance LVCMOS/LVTTL outputs are designed to drive 50O series or parallel terminated transmission lines. The effective fanout can be increased from 6 to 12 by utilizing the ability of the outputs to drive two series terminated lines. The 83905 is characterized at full 3.3V, 2.5V, and 1.8V, mixed 3.3V/2.5V, 3.3V/1.8V and 2.5V/1.8V output operating supply mode. Guaranteed output and part-to-part skew characteristics along with the 1.8V output capabilities makes the 83905 ideal for high performance, single ended applications that also require a limited output voltage.

• Six LVCMOS / LVTTL outputs
• Outputs able to drive 12 series terminated lines
• Crystal Oscillator Interface
• Crystal input frequency range: 10MHz to 40MHz
• Output skew: 80ps (maximum)
• RMS phase jitter @ 25MHz, (100Hz – 1MHz): 0.26ps (typical), VDD = VDDO= 2.5V
• Offset Noise Power
  • 100Hz……………..-129.7 dBc/Hz
  • 1kHz……………….-144.4 dBc/Hz
  • 10kHz……………..-147.3 dBc/Hz
  • 100kHz……………-157.3 dBc/Hz
• 5V tolerant enable inputs
• Synchronous output enables
• Operating power supply modes:
  • Full 3.3V, 2.5V, 1.8V
  • Mixed 3.3V core/2.5V output operating supply
  • Mixed 3.3V core/1.8V output operating supply
  • Mixed 2.5V core/1.8V output operating supply
• 0°C to 70°C ambient operating temperature
• Available in lead-free (RoHS 6) package