The DS250DF230 is a dual-channel multi-rate retimer with integrated signal conditioning. The device is used to extend the reach and robustness of long, lossy, crosstalk-impaired high-speed serial links and while achieving a bit error rate (BER) of 10–15 or less.
Each channel of the DS250DF230 independently locks to serial data rates in a continuous range from 19.6 Gbps to 25.8 Gbps or to any supported sub-rate (÷2 and ÷4), including key data rates such as 12.16512 Gbps, 9.8304 Gbps, 6.144 Gbps.
The DS250DF230 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 DS250DF230 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 available for front-port optical module applications to reset the jitter budget and retime the high-speed serial data. The DS250DF230 supplies 2x2 cross-point that gives the host lane crossing, fanout, and multiplexing options.
The DS250DF230 can be configured either through the SMBus or through an external EEPROM. Up to 16 devices can share an EEPROM using common-channel configuration. A non-disruptive on-chip eye monitor and a PRBS generator and checker is available for in-system diagnostics.