LMK00804B - Low Skew, 1-to-4 Multiplexed Differential/LVCMOS-to-LVCMOS/TTL Fanout Buffer

The LMK00804B is a low skew, high performance clock fanout buffer which can distribute up to four LVCMOS/LVTTL outputs (3.3-V, 2.5-V, 1.8-V, or 1.5-V levels) from one of two selectable 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 terminal is asserted or de-asserted. The outputs are held in logic low state when the clock is disabled. A separate output enable terminal controls whether the outputs are active state or high-impedance state. The low additive jitter and phase noise floor, and guaranteed output and part-to-part skew characteristics make the LMK00804B ideal for applications demanding high performance and repeatability.

See also Device Comparison Table for descriptions of CDCLVC1310 and LMK00725 parts.

• Four LVCMOS/LVTTL Outputs with 7 Ω Output
  Impedance
  • Additive Jitter: 0.04 ps RMS (typ) @ 125 MHz
  • Noise Floor: –166 dBc/Hz (typ) @ 125 MHz
  • Output Frequency: 350 MHz (max)
  • Output Skew: 35 ps (max)
  • Part-to-Part Skew: 700 ps (max)
• Two Selectable Inputs
  • CLK, nCLK Pair Accepts LVPECL, LVDS,
    HCSL, SSTL, LVHSTL, or LVCMOS/LVTTL
  • LVCMOS_CLK Accepts LVCMOS/LVTTL
• Synchronous Clock Enable
• Core/Output Power Supplies:
  • 3.3 V/3.3 V
  • 3.3 V/2.5 V
  • 3.3 V/1.8 V
  • 3.3 V/1.5 V
• Package: 16-Lead TSSOP
• Industrial Temperature Range: –40ºC to +85ºC