DESCRIPTION

· The NB7HQ14M is a high-performance differential 1:4 CML fanout buffer with a selectable Equalizer receiver.

· It compensates for degraded signals transmitted across FR4 PCB backplanes or cable interconnects, outputting four identical CML copies of the input signal.

· The device reduces Inter-Symbol Interference (ISI) caused by losses in copper interconnects or long cables, increasing serial data rates.

· The Equalizer Enable pin (EQEN) controls whether the IN/IN inputs bypass or flow through the Equalizer section, with a default LOW state at startup.

· It is ideal for SONET, GigE, Fiber Channel, Backplane, and other Clock/Data distribution applications.

· The differential inputs incorporate internal 50Ω termination resistors, allowing compatibility with various logic level standards like LVPECL, CML, or LVDS.

· Outputs can be powered by either a 2.5V or 1.8V supply, optimized for low output skew applications.

FEATURES

· Input Data Rate > 10 Gb/s.

· Input Clock Frequency > 7 GHz.

· 150 ps Typical Propagation Delay.

· 35 ps Typical Rise and Fall Times.

· < 15 ps Maximum Output Skew.

· < 0.8 ps Maximum RMS Clock Jitter.

· < 10 ps pp of Data Dependent Jitter.

· Differential CML Outputs, 400 mV Peak-to-Peak, Typical.

· Selectable Input Equalization.

· Operating Range: VCC = 2.375 V to 2.625 V, VCCO = 1.71 V to 2.625 V.

· Internal Input Termination Resistors, 50Ω.

· Ambient Operating Temperature: -40°C to +85°C.

· Pb-Free Device.

APPLICATIONS

· SONET.

· GigE.

· Fiber Channel.

· Backplane.

· Clock/Data Distribution.