1.57 GHz clock conditioner with 1:8 LVDS/LVPECL fanout
The Texas Instruments LMK03001DISQ/NOPB is a precision clock conditioner designed for jitter cleaning and distribution in high-speed systems. It accepts LVCMOS, LVDS, or LVPECL inputs and provides eight LVDS or LVPECL outputs with a 1:8 fanout ratio, operating at frequencies up to 1.57 GHz. Unlike a PLL-based synthesizer, this part focuses on cleaning and redistributing an existing clock — it includes a divider but no multiplier. The 3.15 V to 3.45 V supply range demands a clean 3.3 V rail, and the industrial temperature rating (-40°C to 85°C) suits telecom infrastructure, base stations, data converters, and FPGA reference clock trees.
1.57 GHz — what it means for the clock tree
The 1.57 GHz maximum frequency covers the highest-speed serial interfaces — 10G Ethernet, CPRI, JESD204B converter clocks, and FPGA transceiver reference clocks. If your design runs below 1 GHz, the part still provides margin for the distribution path. The differential input and output paths (LVDS, LVPECL) keep signal integrity intact across the eight fanout channels, which matters when driving multiple ADC/DAC or SerDes devices from a single clean source.
Package and layout: 48-WQFN with exposed pad
Housed in a 48-WQFN (7x7 mm) with an exposed thermal pad, this part needs a solid via-stitched ground plane under the pad for both thermal relief and a low-inductance return path. The supply is a tight 3.15 V to 3.45 V — a 3.3 V rail with ±4.5% regulation. Decoupling at the supply pins with 0.1 µF and 1 µF ceramics close to the package is standard practice for this frequency range.
Lifecycle and sourcing reality
That means no last-time-buy urgency and no forced redesign for new builds. The -DISQ/NOPB suffix indicates the Tape & Reel variant with lead-free (NOPB) finish, which is the standard production ordering option.