●The LMK00308 is a 3-GHz, 8-output differential fanout buffer intended for high-frequency, low-jitter clock/data distribution and level translation. The input clock can be selected from two universal inputs or one crystal input. The selected input clock is distributed to two banks of 4 differential outputs and one LVCMOS output. Both differential output banks can be independently configured as LVPECL, LVDS, or HCSL drivers, or disabled. The LVCMOS output has a synchronous enable input for runt-pulse-free operation when enabled or disabled. The LMK00308 operates from a 3.3 V core supply and 3 independent 3.3 V/2.5 V output supplies.
●The LMK00308 provides high performance, versatility, and power efficiency, making it ideal for replacing fixed-output buffer devices while increasing timing margin in the system.
● 3:1 Input Multiplexer:
● Two Universal Inputs Operate up to 3.1 GHz and Accept LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or Single-Ended Clocks
● One Crystal Input Accepts a 10 to 40 MHz Crystal or Single-Ended Clock
● Two Banks with 4 Differential Outputs Each:
● LVPECL, LVDS, HCSL, or Hi-Z (Selectable Per Bank)
● LVPECL Additive Jitter with LMK03806 Clock Source at 156.25 MHz:
● 20 fs RMS (10 kHz to 1 MHz)
● 51 fs RMS (12 kHz to 20 MHz)
● High PSRR: -65 / -76 dBc (LVPECL/LVDS) at 156.25 MHz
● LVCMOS Output with Synchronous Enable Input
● Pin-Controlled Configuration
● VCC Core Supply: 3.3 V ± 5%
● 3 Independent VCCO Output Supplies: 3.3 V/2.5 V ± 5%
● Industrial Temperature Range: -40°C to +85°C
● 40-lead WQFN (6 mm × 6 mm)
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