LMK00334 4-Output PCIe Gen1/Gen2/Gen3 Clock Buffer/Level Translator - LMK00334

LMK00334 (ACTIVE)

LMK00334 4-Output PCIe Gen1/Gen2/Gen3 Clock Buffer/Level Translator

 

Recommended alternative parts

  • LMK00304  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   Universal buffer

Description

The LMK00334 device is a 4-output HCSL 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 2 HCSL outputs and one LVCMOS output. The LVCMOS output has a synchronous enable input for runt-pulse-free operation when enabled or disabled. The LMK00334 operates from a 3.3-V core supply and 3 independent 3.3-V or 2.5-V output supplies.

The LMK00334 provides high performance, versatility, and power efficiency, making it ideal for replacing fixed-output buffer devices while increasing timing margin in the system.

Features

  • 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- to 40-MHz Crystal or Single-Ended Clock
  • Two Banks With 2 Differential Outputs Each
    • HCSL, or Hi-Z (Selectable)
    • Additive RMS Phase Jitter for PCIe Gen3/Gen4 at 100 MHz:
      • 30 fs RMS (typical)
  • High PSRR: –72 dBc 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
  • 32-Lead WQFN (5 mm × 5 mm)

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Parametrics Compare all products in Differential

 
Additive RMS Jitter (Typ) (fs)
Output Frequency (Max) (MHz)
Input Level
Number of Outputs
Output Level
VCC (V)
VCC Out (V)
Input Frequency (Max) (MHz)
Operating Temperature Range (C)
Rating
LMK00334 LMK00338
30    30   
400    400   
CML
HCSL
HSTL
LVCMOS
LVDS
LVPECL
SSTL
XTAL   
CML
HCSL
HSTL
LVCMOS
LVDS
LVPECL
LVTTL
SSTL
XTAL   
4    8   
HCSL
LVCMOS   
HCSL
LVCMOS   
3.3    3.3   
2.5
3.3   
2.5
3.3   
400    400   
-40 to 85    -40 to 85   
Catalog    Catalog   

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WEBENCH® Designer LMK00334

Frequency Number of Outputs
 MHz
Output Format