1. [Publications](/publications) 2. A 0.190-pJ/bit 25.2-Gb/s/wire Inverter-Based AC-Coupled Transceiver for Short-Reach Die-to-Die Interfaces in 5-nm CMOS # A 0.190-pJ/bit 25.2-Gb/s/wire Inverter-Based AC-Coupled Transceiver for Short-Reach Die-to-Die Interfaces in 5-nm CMOS ![Publication image](/sites/default/files/styles/wide/public/default_images/default.jpeg?itok=qUFsuJCP "Publication image") This paper presents an Inverter-based AC-coupled Toggle (ISR-ACT) transceiver targeted for short-reach die-to-die communication over silicon interposer or similar high-density interconnect. The ISR-ACT’s transmitter sends NRZ data through a small on-chip capacitor into the line. The receiver amplifies the low-swing pulses using a 1st-stage TIA to fully toggle the 2nd-stage output, where positive feedback to the input pad maintains the DC level on the line. Fabricated in a 5nm standard CMOS process, ISR-ACT link shows 0.66UI margin at 25.2Gb/s/wire on a 0.75V supply over a 1.2mm on-chip channel and demonstrates the potential to achieve 0.190pJ/bit. ## Authors [Yoshinori Nishi](/person/yoshi-nishi) John W. Poulton (NVIDIA) [Xi Chen](/person/xi-chen) [Sanquan Song](/person/sanquan-song) [Brian Zimmer](/person/brian-zimmer) [Walker Turner](/person/walker-turner) [Stephen Tell](/person/stephen-tell) [Nikola Nedovic](/person/nikola-nedovic) [John Wilson](/person/john-wilson) [William Dally](/person/william-dally) [Tom Gray](/person/tom-gray) ## Publication Date Thursday, June 15, 2023 ## Published in [2023 IEEE SYMPOSIUM ON VLSI TECHNOLOGY & CIRCUITS](https://ieeexplore.ieee.org/abstract/document/10185334) ## Research Area [Circuits and VLSI Design](/research-area/circuits) ## Copyright This material is posted here with permission of the IEEE. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to .