LMK00725 - Low Skew, 1-to-5, Differential-to-3.3V LVPECL Fanout Buffer

The LMK00725 is a low skew, high-performance clock fanout buffer which can distribute up to five 3.3V LVPECL outputs from one of two inputs, which can accept differential or single-ended inputs. The clock enable input is synchronized internally to eliminate runt or glitch pulses on the outputs when the clock enable pin is asserted or de-asserted. The low additive jitter and phase noise floor and ensured output and part-to-part skew characteristics make the LMK00725 ideal for applications demanding high performance and repeatability.

• Five 3.3V Differential LVPECL Outputs
  • Additive Jitter: 43 fs RMS (typ) @ 312.5 MHz
  • Noise Floor (≥1 MHz offset):
    –158 dBc/Hz (typ) @ 312.5 MHz
  • Output Frequency: 650 MHz (max)
  • Output Skew: 35 ps (max)
  • Part-to-Part Skew: 100 ps (max)
  • Propagation Delay: 0.37 ns (max)
• Two Differential Input Pairs (pin-selectable)
  • CLKx, nCLK Input Pairs can accept LVPECL,
    LVDS, HCSL, SSTL, LVHSTL, or Single-Ended
    Signals
• Synchronous Clock Enable
• Power Supply: 3.3V ±5%
• Package: 20-Lead TSSOP
• Industrial Temperature Range: –40°C to +85°C