IEEE Solid-States Circuits Magazine - Winter 2023 - 51

data rates for published transceivers
have kept pace with these standards
while taking advantage of CMOS
scaling. Figure 10 presents published
transceiver energy efficiency
versus channel losses at the Nyquist
frequency in the 40-50-dB range. In
part, this incredible improvement is
enabled by the power performance
benefits of process technology scaling.
However, sustaining this exponential
trend for I/O BW requires
more than just transistor scaling.
Significant advances in energy efficiency,
channel equalization, and
clocking must be made to enable the
next generation of low-power and
high-performance computing (HPC)
systems. Papers at ISSCC this year
include examples of long-reach PAM4
copper interconnect transceivers
operating up to 112 Gb/s with and
without ADC + DSP equalization architectures.
These include
1) a PAM-4 medium-reach electrical
receiver operating at 200 Gb/s,
with a continuous-time FFE
2) a PAM-8 short-reach electrical transmitter
operating up to 100 Gb/s
3) a 32-Gb/s die-to-die chiplet NRZ
transceiver with high beachfront
density
4) an NRZ WDM receiver module
using seven wavelengths and
50-Gb/s/wavelength to achieve a
350-Gb/s aggregate throughput
5) a PAM-4 optical receiver operating
up to 106.25 Gb/s
6) a short-reach optical coherent
receiver operating up to 24 Gb/s.
New techniques for extending the
data rate, power reduction, channel
equalization, and clock recovery
are reported. These transceivers and
building blocks are implemented in
CMOS technology.
Scaling Electrical Interconnects
to 100 Gb/s and Reaching Out
to >200 Gb/s
BW requirements in data centers and
telecommunication infrastructure
continue to drive the demand for
ultrahigh-speed wireline communication.
Recently, complete transceivers
operating up to 112 Gb/s were
1
110
Process Node (nm)
FIGURE 9: The data rate versus the process node and year.
100
256
128
64
32
16
8
4
2
1
PCle
QPI/KTI
HT
SATA
SAS
USB
DDR
GDDR
CEI
0.5
0.25
2000
2004 2008 2012
Year
2016 2020 2024
FIGURE 8: The per-lane data rate versus the year for a variety of common I/O standards.
Fiber Channel
HDMI
DP
1,000
100
10
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
1,000
Other
ISSCC 2023
100
10
1
0.1
02040
Channel Loss at Nyquist (dB)
FIGURE 10: The power efficiency versus the channel loss and year.
IEEE SOLID-STATE CIRCUITS MAGAZINE WINTER 2023
51
60
Per-Lane Transfer Rate (Gb/s)
Data Rate (Gb/s)
Power Efficiency (mW/Gb/s)

IEEE Solid-States Circuits Magazine - Winter 2023

Table of Contents for the Digital Edition of IEEE Solid-States Circuits Magazine - Winter 2023

Contents
IEEE Solid-States Circuits Magazine - Winter 2023 - Cover1
IEEE Solid-States Circuits Magazine - Winter 2023 - Cover2
IEEE Solid-States Circuits Magazine - Winter 2023 - Contents
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IEEE Solid-States Circuits Magazine - Winter 2023 - Cover3
IEEE Solid-States Circuits Magazine - Winter 2023 - Cover4
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