+3.3V, 622Mbps SDH/SONET 8:1 Serializer with Clock Synthesis and TTL Inputs

Low-Power 622Mbps Mux

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The MAX3690 serializer is ideal for converting 8-bit-wide, 77Mbps parallel data to 622Mbps serial data in ATM and SDH/SONET applications. Operating from a single +3.3V supply, this device accepts TTL clock and data inputs, and delivers a 3.3V differential PECL serial-data output. A fully integrated PLL synthesizes an internal 622MHz serial clock from a low-speed crystal reference clock (77.76MHz, 51.84MHz, or 38.88MHz).

The MAX3690 is available in the extended-industrial temperature range (-40°C to +85°C) in a 32-pin TQFP package.
MAX3690: Typical Operating Circuit MAX3690: Typical Operating Circuit Enlarge+

Key Features

  • Selectable Reference Clock Frequency:   77.76MHz, 51.84MHz, or 38.88MHz
  • Single +3.3V Supply
  • 77Mbps (8-bit) Parallel to 622Mbps Serial Conversion
  • Clock Synthesis for 622Mbps Serial Data
  • 200mW Power
  • TTL Parallel Clock and Data Inputs
  • Differential 3.3V PECL Serial-Data Output


  • 622Mbps ATM/SONET Access Nodes
  • 622Mbps SDH/SONET Transmission Systems
  • Add/Drop Multiplexers
  • Digital Cross-Connects

Quality and Environmental Data

Request Reliability Report for: MAX3690 
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.

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