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UltraLink D2D PHY


  • Silicon proven and prime for customer engagements today

  • Supports multi-chip module (MCM) SoCs on organic substrates

  • 40Gbps wire speed delivers up to 1Tbps/mm unidirectional bandwidth

  • Achieves better than 10-15 BER without requiring FEC

The Cadence® UltraLink D2D PHY IP is a high-performance, low-latency PHY for die-to-die connectivity targeted at the AI/ML, 5G, cloud computing, and networking markets. The UltraLink D2D PHY IP is an enabling technology for D2D and system-in-package (SiP) applications, which enable SoC providers to deliver more customized solutions that offer higher performance and yields while also shortening development cycles and reducing costs through greater IP reuse.


  • 1Tbps/mm unidirectional bandwidth

  • Low power and low latency

  • Easy routing and straightforward integration

  • Supports multi-chip module on organic substrates

  • Better than 10-15 bit error rate (BER) without needing forward error correction (FEC)

Key Features

  • Flexible data rate from 20Gbps to 40Gbps

  • Single-ended NRZ signaling scheme

  • Built-in self-test features to ensure “known good die”

  • Sideband for link management

  • Interoperable between different technology nodes and foundry

Market Requirements

After years of steady SoC and ASIC aggregation to pack more functionality into a monolithic single die, the semiconductor industry can no longer meet growing performance demands. In the face of power, performance, and area (PPA) constraints and reticle limits, and with the cost of production at advanced nodes skyrocketing, there is renewed interest in a disaggregated approach to chip development. Segmenting a single die into smaller functional die, and packaging the resulting D2Ds in various combinations, offers a number of benefits. At the same time, delivering high bandwidth over a small die edge is a challenge for these high-performance SiP applications. As a result, beachfront density, or the amount of data you can transfer without wasting area, has become a key consideration.

Ultralink D2D PHY 40G Transmit Eye