+3.3V, 2.7Gbps Dual 2 x 2 Crosspoint Switch

2.7Gbps 2 x 2 Crosspoint Switch

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The MAX3840 is a dual 2 x 2 asynchronous crosspoint switch for SDH/SONET DWDM and other high-speed data switching applications where serial data stream loop-through and protection channel switching are required. It is ideal for OC-48 systems with forward error correction. A high-bandwidth, fully differential signal path minimizes jitter accumulation, crosstalk, and signal skew. Each 2 x 2 crosspoint switch can fan out and/or multiplex up to 2.7Gbps data and 2.7GHz clock signals. All inputs and outputs are current mode logic (CML) compatible and easily adaptable to interface with an AC-coupled LVPECL signal. When not used, each CML output stage can be powered down with an enable control to conserve power. The typical power consumption is 460mW with all outputs enabled.

The MAX3840 is compatible with the MAX3876 2.5Gbps clock and data recovery (CDR) circuit.

The MAX3840 is available in a 32-pin exposed-pad QFN package (5mm x 5mm footprint) and operates from a +3.3V supply over a temperature range of -40°C to +85°C.
MAX3840: Typical Application Circuit MAX3840: Typical Application Circuit Enlarge+

Key Features

  • Single +3.3V Supply
  • 460mW Power Consumption
  • 2psRMS Random Jitter
  • 7psP-P Deterministic Jitter
  • Power-Down Feature for Deselected Outputs
  • CML Inputs/Outputs
  • 6ps Channel-to-Channel Skew
  • 100ps Output Edge Speed
  • 5mm x 5mm 32 QFN or Thin QFN Package


  • Add/Drop Multiplexers
  • ATM Switch Cores
  • High-Speed Backplanes
  • SDH/SONET and DWDM Transport Systems
  • WDM Cross-Connects
Part NumberSignal TypeSignal TypeFunctionsRxTxData Rates
RxTxSee Notes
MAX3840 CMLCMLSwitch4427003.3
$10.60 @1k
See All High-Speed Interconnect (Differential Signaling) (124)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX3840EVKIT: Evaluation Kit for the MAX3840

Technical Documents

App Note 793 MAX3840: Line and System Loopback with the MAX3840

Quality and Environmental Data

Product Reliability Reports: MAX3840.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


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