LMK00338 Texas instruments

LMK00338

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LMK00338

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Описание

The LMK00338 device is an 8-output PCIe Gen1/Gen2/Gen3/Gen4/Gen5 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 HCSL outputs and one LVCMOS output. The LVCMOS output has a synchronous enable input for runt-pulse-free operation when enabled or disabled. The LMK00338 operates from a 3.3-V core supply and 3 independent 3.3-V or 2.5-V output supplies.The LMK00338 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 400 MHz and Accept LVPECL, LVDS, CML, SSTL, HSTL, HCSL, or Single-Ended Clocks
- One Crystal Input Accepts a 10-MHz to 40-MHz Crystal or Single-Ended Clock
Two Banks With 4 Differential Outputs Each
- HCSL, or Hi-Z (Selectable per Bank)
- Additive RMS Phase Jitter for PCIe Gen5 at 100 MHz:
  - 15 fs RMS (Typical)
–72 dBc 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	Differential, Fanout, Level translator
Additive RMS jitter (typ) (fs)	30
Output frequency (max) (MHz)	400
Number of outputs	8
Output supply voltage (V)	2.5, 3.3
Core supply voltage (V)	3.3
Output skew (ps)	50
Features	PCIe Gen 5 Compliant
Operating temperature range (°C)	-40 to 85
Rating	Catalog
Output type	HCSL, LVCMOS
Input type	CML, HCSL, HSTL, LVCMOS, LVDS, LVPECL, LVTTL, SSTL, XTAL