Chiplet D2D Interconnect Energy Calculator
Advanced Heterogeneous Packaging: Evaluate energy efficiency ($pJ/bit$), wavefront shoreline bandwidth density ($Tbps/mm$), and total power dissipation for UCIe, BoW, and custom D2D links.
Link Architecture & Standards
Channel Loading & Voltage
Energy Efficiency & Bandwidth Density
Recommended Tools & Equipment
Tested hardware and components for high reliability
Chiplet Die-to-Die (D2D) Interconnect Physics
Modular chiplet architectures replace massive monolithic dies with heterogeneous functional silicon tiles connected across high-density packaging substrates.
1. Dynamic Energy & Power Formulations
Interconnect power dissipation is dominated by charging and discharging line and parasitic capacitances:
E_dyn = 0.5 · α · C_total · V_dd² [Joules/bit] E_total = E_dyn + E_static + E_clock Power_total = E_total · Data_Rate_total
2. Shoreline Wavefront Density
BW_density = ( N_lanes · DataRate_lane ) / W_shoreline [Tbps/mm]
Frequently Asked Questions
What is the UCIe standard for die-to-die (D2D) chiplet interconnects?
Universal Chiplet Interconnect Express (UCIe) is the open industry standard defining the complete physical layer, die-to-die adapter, and protocol layers (PCIe, CXL, and Streaming) to seamlessly connect heterogeneous dies from different foundries and process nodes inside a single advanced multi-chip package.
Why is energy efficiency measured in pJ/bit rather than Watts?
Energy per bit ($pJ/bit = \text{mW} / \text{Gbps}$) normalizes power consumption directly against data transfer throughput. Standard board-level SerDes (PCIe, Ethernet) consume $5 \sim 15\,pJ/bit$, which would consume tens of Watts just moving data between closely packaged dies. Modern 2.5D D2D interfaces achieve under $0.5\,pJ/bit$, cutting interconnect power by over $90\%$.
What is shoreline bandwidth density (Tbps/mm)?
Shoreline bandwidth density measures the total bi-directional data throughput that can be routed across each millimeter of die perimeter edge. Advanced 2.5D packaging (CoWoS, EMIB) with microbump pitches of $25\,\mu\text{m}$ to $45\,\mu\text{m}$ enables linear shoreline bandwidth densities exceeding $1.5$ to $3.0\,Tbps/mm$, compared to $< 0.3\,Tbps/mm$ on standard organic packages.