LMK00334 Clock Buffer/Level Translator

4-output PCIe Gen1/Gen2/Gen3 clock buffer/level translator from Texas Instruments

Image of Texas Instruments' LMK00334 Clock Buffer/Level TranslatorTexas Instruments' 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 two 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 three independent 3.3/2.5 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 two differential outputs each:
    • HCSL, or Hi-Z (selectable)
    • Additive RMS phase jitter for PCIe Gen3 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: 3.3/2.5 V ±5%
  • Industrial temperature range: –40°C to +85°C
  • 32-lead WQFN (5 × 5 mm)

LMK00334 Clock BufferLevel Translator

ImageManufacturer Part NumberDescriptionPLLMain PurposeAvailable Quantity
LMK00334RTVR datasheet linkIC CLK BUF 400MHZ 1CIRC 32WQFNLMK00334RTVRIC CLK BUF 400MHZ 1CIRC 32WQFNNoPCI Express (PCIe), SATA CPU940 - Immediate
10000 - Factory Stock
LMK00334RTVR product page link
LMK00338RTAR datasheet linkIC CLK BUF 400MHZ 1CIRC 40WQFNLMK00338RTARIC CLK BUF 400MHZ 1CIRC 40WQFNNoPCI Express (PCIe), SATA CPU1863 - Immediate
10000 - Factory Stock
LMK00338RTAR product page link

Evaluation Boards

ImageManufacturer Part NumberDescriptionMain PurposeEmbeddedUtilized IC / PartAvailable Quantity
LMK00304EVM/NOPB datasheet linkBOARD EVAL FOR LMK00304LMK00304EVM/NOPBBOARD EVAL FOR LMK00304Timing, Clock DistributionNoLMK0030414 - Factory StockLMK00304EVM/NOPB product page link
LMK00308EVM/NOPB datasheet linkBOARD EVAL FOR LMK00308LMK00308EVM/NOPBBOARD EVAL FOR LMK00308Timing, Clock DistributionNoLMK0030824 - Factory StockLMK00308EVM/NOPB product page link
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Published: 2014-02-05