Overview

The HXC42400 is a uni-directional Quad Channel CDR / Retimer for retiming data rates from 25Gbps to 28.05Gbps. It is optimized for 100Gbps Ethernet, OIF CEI-28G-VSR and OTU-4 Optical Transport applications. The HXC42400 can be used in either direction of a transceiver module and can be adopted into QSFP28+, or CFP2/CFP4 modules because of its low 100mW per channel power dissipation. In Bypass operation, the HXC42400 supports legacy data rates up to 16Gbps.

Designed for direct DC-coupled anode drive of the DFB laser diode for cost-effective and compact assemblies. Available in FCBGA 5x5mm form.

HXC42400 - Block Diagram
HXC42400 - Block Diagram
  • Quad 25 – 28Gbps CDR / Retimer
  • Bypass-mode to support legacy data rate up to 16Gbps
  • Programmable 3-tap output de-emphasis for transmit
  • Adaptive linear equalizer and decision-feedback equalizer (DFE) to cover up to 16dB lossy channel in receiver
  • Low sensitivity of 20mVPPD and adjustable threshold level of data sampler
  • Reference-less and Master channel-less operation
  • Independent, adaptive bandwidth control in RX CDR for optimum jitter tolerance
  • Programmable output swing up to 1200mVpp
  • Internal and automatic DC and phase offset calibrations
  • On-chip testability; EOM, JTOL, PRBS generator/checker, local/remote loopback,
  • Polarity (P/N) inversion
  • I2C control interface

Documentation

= Featured Documentation
Type Title Date
Product Brief
HXC42400 Product Brief
PDF 183 KB
End Of Life Notice
PLC# : 210007 End-of-Life (EOL) Process on Select Part Numbers
PDF 160 KB
2 items

Design & Development

ECAD Models

Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.

Explore ECAD Models
Diagram of ECAD Models

Product Options

    Processing table
    Pkg. Type
    Temp. Grade
    Carrier Type
    Buy / Sample
    Part Number
    HXC42400-BFI
    circleObsolete
    memory
    view_in_ar
    		VFQFPN C Tube
    HXC42400-EVB
    circleObsolete
    memory
    view_in_ar
    		BOARD C Box
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    Watch an overview of the industry’s first CMOS-based PAM4 CDR solutions, HXT14450 50G/lane PAM4 integrated CDR with VCSEL driver and HXR14450 TIA designed for 200 Gb/s and 400 Gb/s transceivers and AOCs (active optical cables) in datacenters. The series features significantly lower power and smaller size compared with traditional DSP solutions, as well as higher integration – including an integrated MCU – to further simplify system design.

    Video List
    HXT14450 / HXR14450 Integrated 56 Gb/s Optical CDR / Retimers