The DS250DF810 is an eight-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 1015 or less.
Each channel of the DS250DF810 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 DS250DF810
to support individual lane Forward Error Correction
Integrated physical AC coupling capacitors (TX and RX) eliminate the need for external capacitors on the PCB.
The DS250DF810 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 DS250DF810 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 DS250DF810 implements 2×2 cross-point on each channel
pair, providing the host with both lane crossing and fanout options.
The DS250DF810 can be configured either via the SMBus or through an external EEPROM. Up to 16 devices
can share a single EEPROM. A non-disruptive on-chip eye monitor and a PRBS generator/checker allow for insystem
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