LMK00308 Texas instruments

LMK00308

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LMK00308

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Описание

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
V_CC Core Supply: 3.3 V ± 5%
3 Independent V_CCO Output Supplies: 3.3 V/2.5 V ± 5%
Industrial Temperature Range: -40°C to +85°C
40-lead WQFN (6 mm × 6 mm)

Function	Fanout, Level translator
Additive RMS jitter (typ) (fs)	51
Output frequency (max) (MHz)	3100
Number of outputs	9
Output supply voltage (V)	2.5, 3.3
Core supply voltage (V)	3.3
Output skew (ps)	50
Features	Pin programmable
Operating temperature range (°C)	-40 to 85
Rating	Catalog
Output type	HCSL, LVCMOS, LVDS, LVPECL
Input type	CML, HCSL, HSTL, LVCMOS, LVDS, LVPECL, LVTTL, SSTL, XTAL