21-Bit Deserializers with Programmable Spread Spectrum and DC Balance

Fully Integrated Deserializer with Spread Spectrum for EMI Reduction in Digital Video Applications

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The MAX9242/MAX9244/MAX9246/MAX9254 deserialize three LVDS serial-data inputs into 21 single-ended LVCMOS/LVTTL outputs. A separate parallel-rate LVDS clock provides the timing for deserialization. The MAX9242/MAX9244/MAX9246/MAX9254 feature spread-spectrum capability, allowing the output data and clock frequency to spread over a specified range to reduce EMI. The single-ended data and clock outputs are programmable for a frequency spread of ±2%, ±4%, or no spread. The spread-spectrum function is also available when the MAX9242/MAX9244/MAX9246/MAX9254 operate in non-DC-balanced mode. The modulation rate of the spread is 32kHz for a 33MHz LVDS clock input and scales linearly with frequency. The single-ended outputs have a separate supply, allowing +1.8V to +5V output logic levels.

The MAX9254 features high output drive current for both data and clock outputs for faster transition times in the presence of heavy capacitive loads.

The MAX9242/MAX9244/MAX9246/MAX9254 feature programmable DC balance, allowing isolation between a serializer and deserializer using AC-coupling. The MAX9242/MAX9244/MAX9246/MAX9254 operate with the MAX9209/MAX9213 serializers and are available with a rising-edge strobe (MAX9242) or falling-edge strobe (MAX9244/MAX9246/MAX9254). The LVDS inputs meet ISO 10605 ESD specifications with ±30kV Air-Gap Discharge and ±6kV Contact Discharge ratings.
MAX9242, MAX9244, MAX9246, MAX9254: Functional Diagram MAX9242, MAX9244, MAX9246, MAX9254: Functional Diagram Enlarge+

Key Features

  • Programmable ±4%, ±2%, or OFF Spread-Spectrum Output for Reduced EMI
  • Programmable DC-Balanced or Non-DC-Balanced Modes
  • DC Balance Allows AC-Coupling for Wider Input Common-Mode Voltage Range
  • Spread Spectrum Operates in DC-Balanced or Non-DC-Balanced Mode
  • High Output Drive (MAX9254)
  • π/4 Deskew by Oversampling (MAX9242/MAX9244/MAX9254)
  • 16MHz-to-34MHz (DC-Balanced) and 20MHz-to-40MHz (Non-DC-Balanced) Operation (MAX9242/MAX9244/MAX9254)
  • 6MHz-to-18MHz (DC-Balanced) and 8MHz-to-20MHz (Non-DC-Balanced) Operation (MAX9246)
  • Rising-Edge (MAX9242) or Falling-Edge (MAX9244/MAX9246/MAX9254) Output Strobe
  • High-Impedance Outputs when Active-Low PWRDWN is Low Allow Output Busing
  • Separate Output Supply Allows Interface to +1.8V, +2.5V, +3.3V, and +5V Logic
  • LVDS Inputs Meet ISO 10605 ESD Protection at ±30kV Air-Gap Discharge and ±6kV Contact Discharge
  • LVDS Inputs Meet IEC 61000-4-2 Level 4 ESD Protection at ±15kV Air-Gap Discharge and ±8kV Contact Discharge
  • LVDS Inputs Conform to ANSI TIA/EIA-644 Standard
  • +3.3V Main Power Supply


  • Automotive DVD Entertainment Systems
  • Automotive Navigation Systems
  • Digital Copiers
  • Laser Printers

MAX9209EVKIT: Evaluation Kit for the MAX9209 and MAX9244
MAX9244EVKIT: Evaluation Kit for the MAX9209 and MAX9244
Request Reliability Report for: MAX9246 
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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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