AD8156

6.25 Gbps, 4 × 4, Digital Crosspoint Switch with EQ AD8156 FEATURES 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 mV p-p to 1.6 V p-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 Low random jitter: 0.8 ps rms Integrated 50 Ω termination impedance at inputs/outputs Individual output disable for power savings www.DataSheet4U.com 49-ball, 8 mm × 8 mm BGA, 1 mm pitch FUNCTIONAL BLOCK DIAGRAM INPUT RECEIVERS IN0P/N INPUT EQUALIZATION EQ AD8156 OUTPUT DRIVERS OUT0P/N IN1P/N IN2P/N EQ 4×4 SWITCH OUT1P/N OUT2P/N EQ IN3P/N EQ OUT3P/N Figure 1. APPLICATIONS Backplane equalization SONET/SDH Gigabit Ethernet XAUI Fibre Channel GENERAL DESCRIPTION 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 equali...