1. Products
  2. Switches and Multiplexers
  3. Digital Crosspoint Switches
  4. AD8156


Features and Benefits

  • 4 × 4, fully differential, nonblocking array
  • Configurable for dual 2 × 2 operation
  • DC to 6.25 Gbps per channel, NRZ data rate
  • Programmable input equalization compensates for over 40” of FR-4 at 6.25 Gbps
  • Multicast and broadcast modes of operation
  • Programmable output swing
    100 mVp-p to 1.6 Vp-p differential
  • Power supply: 3.3 V (±10%)
  • Low power
    No EQ: 400 mW typical
    Maximum EQ: 700 mW typical
  • Inputs: ac-coupled or dc-coupled
  • Wide set of dc-coupled input standards
    3.3 V/2.5 V/1.8 V CML or 3.3 V LVPECL
  • Control: LVTTL- or LVCMOS-compatible
  • Low additive jitter: 25 ps p-p typical

Product Details

The AD8156, a member of the Xstream line of products, is a high speed, fully differential, digital crosspoint switch. The part can function as a 4 × 4 crosspoint switch with double-latched memory, allowing simultaneous updates, or as a dual 2 × 2 with direct output control. The AD8156 has low power dissipation, typically 700 mW on 3.3 V with all outputs and input equalizers active. It operates at any data rate from dc to 6.25 Gbps per port.

Each input channel on the AD8156 has a programmable input equalizer to compensate for signal loss over a backplane.

The AD8156 high speed inputs are compatible with both ac-coupled and dc-coupled 3.3 V, 2.5 V, or 1.8 V CML, as well as 3.3 V LVPECL data levels. The control interface is LVTTL- and LVCMOS-compatible at 3.3 V. All input and output termination resistors are integrated for ease of layout and to minimize impedance mismatch. Input equalization and unused outputs can be individually disabled to minimize power dissipation.

The AD8156 is packaged in a 49-ball, 8 mm × 8 mm, BGA package with a 1 mm ball pitch. It operates over the industrial temperature range of −40°C to 85°C.


  • Gigabit Ethernet
  • XAUI
  • Fibre Channel

Product Lifecycle icon-not-recommended Not Recommended for New Designs

This designates products ADI does not recommend broadly for new designs.

Evaluation Kits (1)

Design Resources

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.View our quality and reliability program and certifications for more information.

Part Number Material Declaration Reliability Data Pin/Package Drawing CAD Symbols, Footprints & 3D Models
AD8156ABCZ Material Declaration Reliability Data 49-Ball CSPBGA (8mm x 8mm)
Wafer Fabrication Data

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