The DS250DF210 device is a two-channel, multi-rate retimer with integrated signal
conditioning. It is used to extend the reach and robustness of long, lossy, crosstalk-impaired,
high-speed serial links while achieving a bit error rate (BER) of 10–15
Each channel of the DS250DF210 independently locks to serial data rates in a continuous
range from 20.6 Gbps to 25.8 Gbps or to any supported sub-rate (÷2 and ÷4), including key data
rates such as 10.3125 Gbps and 12.5 Gbps, which allows the DS250DF210 to support individual lane
Forward Error Correction (FEC) pass-through.
The DS250DF210 has a single power supply and minimal need for external components. These
features reduce PCB-routing complexity and BOM cost.
The advanced equalization features of the DS250DF210 include a low-jitter 3-tap transmit
finite impulse response (FIR) filter, an adaptive continuous-time linear equalizer (CTLE), and an
adaptive decision feedback equalizer (DFE). This enables reach extension for lossy interconnect and
backplanes with multiple connectors and crosstalk. The integrated CDR function is ideal for
front-port optical module applications to reset the jitter budget and retime the high-speed serial
data. The DS250DF210 implements a 2x2 cross-point, providing the host with lane crossing, fanout,
and multiplexing options
The DS250DF210 can be configured either through the SMBus or through an external EEPROM.
Up to 16 devices can share a single EEPROM using Common Channel format. A non-disruptive, on-chip
eye monitor and a PRBS generator or checker allow for in-system diagnostics.
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