DS250DF230 25-Gbps multi-rate 2-channel retimer | TI.com

DS250DF230 (PREVIEW)

25-Gbps multi-rate 2-channel retimer

25-Gbps multi-rate 2-channel retimer - DS250DF230
Datasheet
 

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Description

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.

Features

  • Dual-Channel Multi-Rate Retimer With Integrated Signal Conditioning
  • All Channels Lock Independently From 19.6 to 25.8 Gbps (Including Sub-Rates, Such as 12.16512 Gbps, 9.8304 Gbps, 6.144 Gbps, and More)
  • Ultra-Low Latency: <500 ps Typical for 25.78125-Gbps Data Rate
  • Adaptive Continuous Time Linear Equalizer (CTLE)
  • Continuous Adaptive Decision Feedback Equalizer (DFE) and Adaptation Algorithm, Capable to Compensate Large Channel Loss Variation Over Temperature
  • Combined Equalization Supporting 35-dB Channel Loss at 12.9 GHz
  • On-Chip Eye-Opening Monitor (EOM), PRBS Pattern Checker and Generator
  • Low-Jitter Transmitter With 3-Tap FIR Filter
  • Integrated 2×2 Cross-Point
  • Recovered Clock Available for System Clock Synchronization Applications on Channel 0
  • Single Power Supply, No Low-Jitter Reference Clock Required
  • Wide Stay-In-Lock Temperature Range

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Parametrics Compare all products in Ethernet retimers, redrivers/repeaters & MUX buffers

 
Device type
Number of channels (#)
Application
Input compatibility
Speed (Max) (Gbps)
SupplyVoltage (Volt)
Protocols
Operating temperature range (C)
Package Group
Pin/package
DS250DF230 DS250DF210 DS250DF410 DS250DF810 DS280DF810
Retimer     Retimer     Retimer     Retimer     Retimer    
2     2     4     8     8    
Backplane Front Port Active Cable     Backplane
Front Port
Active Cable    
Backplane
Front Port
Active Cable    
Backplane
Front Port    
 
AC-Coupled CML     AC-Coupled
CML    
AC-Coupled
CML    
AC-Coupled
CML    
AC-Coupled
CML    
25.8     25.8     25.8     25.8     28.4    
2.5     2.5     2.5     2.5     2.5    
IEEE802.3bj 100GbE Infiniband EDR OIF-CEI-25G-LR/MR/SR/VSR CPRI QSFP28 CFP2/CFP4 CDFP     IEEE802.3bj
100GbE
Infiniband EDR
OIF-CEi-25G-LR/MR/SR/VSR
QSFP28
CFP2/CFP4
CDFP    
IEEE802.3bj
100GbE
Infiniband EDR
OIF-CEi-25G-LR/MR/SR/VSR
QSFP28
CFP2/CFP4
CDFP    
IEEE802.3bj
100GbE
Infiniband EDR
OIF-CEi-25G-LR/MR/SR/VSR
QSFP28
CFP2/CFP4
CDFP    
 
-40 to 85     -40 to 85     -40 to 85     -10 to 85     -40 to 85    
NFBGA | 36     FC/CSP | 101     FC/CSP | 101     FCBGA | 135     FCBGA | 135    
36NFBGA     101FC/CSP     101FC/CSP     135FCBGA     135FCBGA