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.