LMK00334
www.ti.com
SNAS635 –DECEMBER 2013
LMK00334 4-Output PCIe/Gen1/Gen2/Gen3 Clock Buffer/Level Translator
Check for Samples: LMK00334
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FEATURES
APPLICATIONS
2
•
3:1 Input Multiplexer
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Clock Distribution and Level Translation for
ADCs, DACs, Multi-Gigabit Ethernet, XAUI,
Fibre Channel, SATA/SAS, SONET/SDH, CPRI,
High-Frequency Backplanes
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Two Universal Inputs Operate up to 400
MHz and Accept LVPECL, LVDS, CML,
SSTL, HSTL, HCSL, or Single-Ended Clocks
•
•
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Switches, Routers, Line Cards, Timing Cards
Servers, Computing, PCI Express (PCIe 3.0)
Remote Radio Units and Baseband Units
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One Crystal Input Accepts a 10 to 40 MHz
Crystal or Single-Ended Clock
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Two Banks with 2 Differential Outputs Each
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HCSL, or Hi-Z (Selectable)
DESCRIPTION
Additive RMS Phase Jitter for PCIe Gen3 at
100MHz:
The LMK00334 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
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30 fs RMS (typical)
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High PSRR: -72 dBc at 156.25 MHz
LVCMOS Output with Synchronous Enable
Input
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•
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Pin-Controlled Configuration
VCC Core Supply: 3.3 V ± 5%
supply and
supplies.
3 independent 3.3 V/2.5 V output
3 Independent VCCO Output Supplies: 3.3 V/2.5
V ± 5%
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.
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Industrial Temperature Range: -40°C to +85°C
32-lead WQFN (5 mm x 5 mm)
FUNCTIONAL BLOCK DIAGRAM
CLKout_EN
CLKout_EN
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2013, Texas Instruments Incorporated