NB7HQ14MMNHTBG

Clock Buffers, Drivers Overview

The NB7HQ14MMNHTBG is a high-performance differential 1:4 CML fanout buffer from onsemi, designed for clock and data distribution paths operating up to 7 GHz or 10 Gbps. It features a selectable input equalizer to compensate for signal degradation across FR4 backplanes or cables, reducing inter-symbol interference. The device incorporates internal 50-ohm termination resistors accessed via the VT pin, supporting LVPECL, CML, and LVDS logic levels. Outputs are powered by either a 2.5 V (VCC) core supply and a 1.8 V or 2.5 V (VCCO) output supply. Key electrical parameters include a typical propagation delay of 150 ps, maximum output skew under 15 ps, and RMS clock jitter below 0.8 ps.

Clock Buffers, Drivers Feature Summary

• Selectable Input Equalizer: EQEN pin allows bypassing or enabling equalization to mitigate Inter-Symbol Interference (ISI).
• Multi-Level Inputs: Internal 50-ohm termination supports LVPECL, CML, and LVDS standards via the VT pin.
• Flexible Output Supply: CML outputs operate with VCCO ranging from 1.71 V to 2.625 V.
• Low Jitter Performance: Maximum RMS clock jitter is < 0.8 ps; peak-to-peak data-dependent jitter is < 10 ps.

Clock Buffers, Drivers Applications

• SONET/SDH Clock Distribution
• Gigabit Ethernet (GigE) Interfaces
• Fiber Channel Systems
• Backplane Clock/Data Routing

Clock Buffers, Drivers Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm package type and shipping quantity. The 'T' suffix indicates a tape and reel configuration containing 100 units per reel. Confirm that the component meets RoHS compliance requirements and lead-free status as specified in the product attributes before finalizing procurement specifications.

Clock Buffers, Drivers Selection Notes

Select this component when driving four loads with CML signals at frequencies up to 7 GHz. Ensure the PCB layout accommodates the QFN-16 package with an exposed pad connected to ground for thermal management. Verify that the input source voltage swing falls within the 100 mV to 1200 mV range and that the control pins are properly biased to enable or disable the equalizer function as required by the interconnect length.

Clock Buffers, Drivers Part Context

This part belongs to the GigaComm family of high-speed clock products manufactured by onsemi. It serves as a fanout buffer within the NB7HQ14M series, which includes variants with different packaging options such as rails and standard reels. The MMNHTBG designation specifically identifies the QFN-16 package with a 100-unit tape and reel shipping configuration.

Clock Buffers, Drivers Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's official cross-reference tools or application notes for compatible alternatives within the GigaComm family.