GENERAL DESCRIPTION

The AD8158 is an asynchronous, protocol-agnostic, quad-lane 2:1 switch with a total of 12 differential CML inputs and 12 differential CML outputs. The signal path supports NRZ signaling with data rates up to 6.5 Gbps per lane. Each lane offers programmable receive equalization, programmable output pre-emphasis, programmable output levels, and loss-of signal detection.

FEATURES

  Quad 2:1 mux/1:2 demux

  Optimized for dc to 6.5 Gbps NRZ data

  Per-lane P/N pair inversion for routing ease

  Programmable input equalization

     Compensates up to 40 inches of FR4

  Loss-of-signal detection

  Programmable output pre-emphasis up to 12 dB

  Programmable output levels with squelch and disable

  Accepts ac-coupled or dc-coupled differential CML inputs

  50 Ω on-chip termination

  1:2 demux supports unicast or bicast operation

  Port-level loopback

  Port or single lane switching

  1.8 V to 3.3 V flexible core supply

  User-settable I/O supply from VCC to 1.2 V

  Low power, typically 2.0 W in basic configuration

  100-lead LFCSP

  −40°C to +85°C operating temperature range

APPLICATIONS

  Low cost redundancy switch

  SONET OC48/SDH16 and lower data rates

  XAUI/GbE/FC/Infiniband over backplane

  OIF CEI 6.25 Gbps over backplane

  Serial data-level shift

  4-/8-/12-lane equalizers or redrivers