MAX9246:21-Bit Deserializers with Programmable Spread Spectrum and DC Balance

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

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.

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
MAX9242, MAX9244, MAX9246, MAX9254: Functional Diagram
MAX9242, MAX9244, MAX9246, MAX9254: Functional Diagram
Applications/Uses
  • Automotive DVD Entertainment Systems
  • Automotive Navigation Systems
  • Digital Copiers
  • Laser Printers
DataSheet
titleDownload file
MAX9242-MAX9254 Data SheetMAX9242-MAX9254.pdf
Parametrics
Part NumberSignal TypeSignal TypeFunctionsRxTxData Rates
(Mbps)
VSUPPLY
(V)
Package/PinsBudgetary
Price
RxTxSee Notes
MAX9242LVDSLVCMOSDeserializer4218403.3TSSOP/48$5.48 @1k
MAX9244840TSSOP/48-
MAX9246420TSSOP/48-
MAX9254840TSSOP/48$4.69 @1k
Design kits & evaluation modules
Related Products
  • MAX9238:Hot-Swappable, 21-Bit, DC-Balanced LVDS Deserializers
  • MAX9236:Hot-Swappable, 21-Bit, DC-Balanced LVDS Deserializers
  • MAX9234:Hot-Swappable, 21-Bit, DC-Balanced LVDS Deserializers
  • MAX9209:Programmable DC-Balanced 21-Bit Serializers
  • MAX9213:Programmable DC-Balanced 21-Bit Serializers
  • MAX9214:Programmable DC-Balance 21-Bit Deserializers
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX9246EUMNo Longer AvailableTSSOP;48 pin-40°C to +85°CSee data sheet
MAX9246EUM+DLast Time BuyTSSOP,;48 pin;102.1 mm²-40°C to +85°CLead Free
MAX9246EUM+TDLast Time BuyTSSOP,;48 pin;102.1 mm²-40°C to +85°CLead Free
MAX9246EUM-DNo Longer AvailableMAX9246EUM+DTSSOP;48 pin-40°C to +85°CSee data sheet
MAX9246EUM-TNo Longer AvailableTSSOP;48 pin-40°C to +85°CSee data sheet
MAX9246EUM-TDNo Longer AvailableMAX9246EUM+TDTSSOP;48 pin-40°C to +85°CSee data sheet
MAX9246EUM/V+No Longer AvailableTSSOP,;48 pin;102.1 mm²-40°C to +85°CLead Free
MAX9246EUM/V+TNo Longer AvailableTSSOP,;48 pin;102.1 mm²-40°C to +85°CLead Free
MAX9246GUM+DActiveTSSOP;-40°C to +105°CSee data sheet
MAX9246GUM+TDActiveTSSOP;-40°C to +105°CSee data sheet
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX9246GUM/V+No Longer AvailableTSSOP,;48 pin;102.1 mm²-40°C to +105°CLead Free
MAX9246GUM/V+TNo Longer AvailableTSSOP,;48 pin;102.1 mm²-40°C to +105°CLead Free
MAX9242-MAX9254.pdf MAX9254
MAX9242-MAX9254_cn.pdf MAX9254
MAX9242-MAX9254_cn.pdf MAX9246