1 Features
• Quad-channel multi-protocol retimer with
integrated signal conditioning
• All channels lock independently to both PAM4 and
NRZ data rates from 19.6 to 28.9 GBd (including
div-by-2 and div-by-4 sub-rates)
• Suitable for up to CEI-56G, Ethernet™ (400 GbE),
fibre channel (64GFC), InfiniBand™ (HDR), and
CPRI/eCPRI PCB, copper cable, and optical
applications
• Automatic lane rate switching for CDR lock up
to five different combinations of baud rates and
modulation types
• Low latency: <2000 ps (typical) at 26.5625 GBd
• Continuously adaptive time linear equalizer
(CTLE), RX feed-forward equalizer (FFE), and
decision feedback equalizer (DFE) to support 30+
dB channel loss at 13.28 GHz
• Integrated 2×2 crosspoint
• Adjustable 4-tap TX FFE filter
• Gearbox mode support (NRZ/PAM4 bit mux/demux,
NRZ/PAM4 serializer/deserializer)
• On-chip eye opening monitor (EOM), PRBS
generator, and PRBS checker for debug
• Dual 1.8-V and 1.2-V supplies
• –40°C to +85°C operating temperature range
• 7.65 mm × 7.65 mm BGA package with integrated
AC coupling capacitors

2 Applications
• Active electrical cables (AEC) (SFP, SFP-DD,
QSFP, QSFP-DD, OSFP)
• Front-port C2M attachment unit interface (AUI)
jitter cleaning
• Backplane (KR) and midplane C2C attachment
unit interface (AUI) reach extension
• Speed doubling (gearbox) with NRZ-to-PAM4
aggregation and de-aggregation

3 Description
The DS560DF410 is a four-channel multi-rate retimer
with integrated signal conditioning. It extends the
reach and robustness of long, lossy, crosstalkimpaired
high-speed serial links.
Each channel in the DS560DF410 independently
locks to symbol rates (PAM4 and NRZ) in a
continuous range from 19.6 to 28.9 GBd or to any
supported sub-rate. The integrated CDR function is
ideal for front-port optical module applications to reset
the jitter budget and retime the high-speed serial
data. These features allow for individual lane forward
error correction (FEC) pass-through. In addition, the
DS560DF410 supports automatic lane rate switching
for CDR lock up to five different combinations of baud
rates and modulation types without host intervention.
The advanced equalization features of the
DS560DF410 include a continuously adaptive
continuous-time linear equalizer (CTLE), RX feedforward
equalizer (FFE), decision feedback equalizer
(DFE), and a programmable, low-jitter 4-tap TX feedforward
equalizer (FFE) filter. These features enable
reach extension for lossy interconnects such as
direct-attach copper (DAC) cables and backplanes
with multiple connectors and crosstalk.