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27-Bit, 5MHz to 42MHz DC-Balanced LVDS Deserializers

Fully Integrated, Single-Link Deserializer for Digital Video Applications

Product Details

The MAX9248/MAX9250 digital video serial-to-parallel converters deserialize a total of 27 bits during data and control phases. In the data phase, the LVDS serial input is converted to 18 bits of parallel video data and in the control phase, the input is converted to 9 bits of parallel control data. The separate video and control phases take advantage of video timing to reduce the serial-data rate. The MAX9248/MAX9250 pair with the MAX9247 serializer to form a complete digital video transmission system. For operating frequencies less than 35MHz, the MAX9248/MAX9250 can also pair with the MAX9217 serializer.

The MAX9248 features spread-spectrum capability, allowing output data and clock to spread over a specified frequency range to reduce EMI. The data and clock outputs are programmable for a spectrum spread of ±4% or ±2%. The MAX9250 features output enable input control to allow data busing.

Proprietary data decoding reduces EMI and provides DC balance. The DC balance allows AC-coupling, providing isolation between the transmitting and receiving ends of the interface. The MAX9248/MAX9250 feature a selectable rising or falling output latch edge.

ESD tolerance is specified for ISO 10605 with ±10kV Contact Discharge and ±30kV Air-Gap Discharge.

The MAX9248/MAX9250 operate from a +3.3V ±10% core supply and feature a separate output supply for interfacing to 1.8V to 3.3V logic-level inputs. These devices are available in a 48-lead LQFP package and are specified from -40°C to +85°C or -40°C to +105°C.

Key Features

  • Programmable ±4% or ±2% Spread-Spectrum Output for Reduced EMI (MAX9248)
  • Proprietary Data Decoding for DC Balance and Reduced EMI
  • Control Data Deserialized During Video Blanking
  • Five Control Data Inputs are Single-Bit-Error Tolerant
  • Output Transition Time is Scaled to Operating Frequency for Reduced EMI
  • Staggered Output Switching Reduces EMI
  • Output Enable Allows Busing of Outputs (MAX9250)
  • Clock Pulse Stretch on Lock
  • Wide ±2% Reference Clock Tolerance
  • Synchronizes to MAX9247 Serializer Without External Control
  • ISO 10605 and IEC 61000-4-2 Level 4 ESD Protection
  • Separate Output Supply Allows Interface to 1.8V to 3.3V Logic
  • +3.3V Core Power Supply
  • Space-Saving LQFP Package
  • -40°C to +85°C and -40°C to +105°C Operating Temperature Ranges

Applications/Uses

  • In-Vehicle Entertainment Systems
  • LCD Displays
  • Navigation System Displays
  • Video Cameras
Parametric specs for High-Speed Interconnect (Differential Signaling)
Signal Type (Rx) LVDS
Signal Type (Tx) LVCMOS
Functions Deserializer
# Rx 1
# Tx 27
Data Rates (Mbps) 756
VSUPPLY (V) 3.3
Package/Pins LQFP/48
Budgetary
Price (See Notes)
$5.43 @1k
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Simplified Block Diagram

MAX9248, MAX9250: Functional Diagram MAX9248, MAX9250: Functional Diagram Zoom icon

Design & Development

Click any title below to view the detail page where available.

Description

The MAX9247/MAX9248 evaluation kit (EV kit) provides a proven design to evaluate the MAX9247 27-bit, 2.5MHz to 42MHz DC-balanced LVDS serializer and the MAX9248 27-bit, 2.5MHz to 42MHz DC-balanced LVDS deserializer. The MAX9247 serializes 27 bits of parallel input data, 18 bits of video, and 9 bits of control to a serial data stream. The MAX9248 deserializes the LVDS serial input, which converts to 18 bits of parallel video data and 9 bits of parallel control data.

The EV kit PCB has a MAX9247ECM+ or MAX9247GCM+ and a MAX9248ECM+ or MAX9248GCM+ installed.

View Details

Features

  • 27-Bit Parallel Interface
  • Rosenberger Connector (Cable Included)
  • Independent Evaluation of the MAX9247/MAX9248 Serializer/Deserializer (SerDes)
  • Proven PCB Layout
  • Fully Assembled and Tested

Description

The MAX9247/MAX9248 evaluation kit (EV kit) provides a proven design to evaluate the MAX9247 27-bit, 2.5MHz to 42MHz DC-balanced LVDS serializer and the MAX9248 27-bit, 2.5MHz to 42MHz DC-balanced LVDS deserializer. The MAX9247 serializes 27 bits of parallel input data, 18 bits of video, and 9 bits of control to a serial data stream. The MAX9248 deserializes the LVDS serial input, which converts to 18 bits of parallel video data and 9 bits of parallel control data.

The EV kit PCB has a MAX9247ECM+ or MAX9247GCM+ and a MAX9248ECM+ or MAX9248GCM+ installed.

View Details

Features

  • 27-Bit Parallel Interface
  • Rosenberger Connector (Cable Included)
  • Independent Evaluation of the MAX9247/MAX9248 Serializer/Deserializer (SerDes)
  • Proven PCB Layout
  • Fully Assembled and Tested

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SIMULATION MODELS

MAX9248 IBIS Model

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Support & Training

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Parameters

Parametric specs for High-Speed Interconnect (Differential Signaling)
Signal Type (Rx) LVDS
Signal Type (Tx) LVCMOS
Functions Deserializer
# Rx 1
# Tx 27
Data Rates (Mbps) 756
VSUPPLY (V) 3.3
Package/Pins LQFP/48
Budgetary
Price (See Notes)
$5.43 @1k

Key Features

  • Programmable ±4% or ±2% Spread-Spectrum Output for Reduced EMI (MAX9248)
  • Proprietary Data Decoding for DC Balance and Reduced EMI
  • Control Data Deserialized During Video Blanking
  • Five Control Data Inputs are Single-Bit-Error Tolerant
  • Output Transition Time is Scaled to Operating Frequency for Reduced EMI
  • Staggered Output Switching Reduces EMI
  • Output Enable Allows Busing of Outputs (MAX9250)
  • Clock Pulse Stretch on Lock
  • Wide ±2% Reference Clock Tolerance
  • Synchronizes to MAX9247 Serializer Without External Control
  • ISO 10605 and IEC 61000-4-2 Level 4 ESD Protection
  • Separate Output Supply Allows Interface to 1.8V to 3.3V Logic
  • +3.3V Core Power Supply
  • Space-Saving LQFP Package
  • -40°C to +85°C and -40°C to +105°C Operating Temperature Ranges

Applications/Uses

  • In-Vehicle Entertainment Systems
  • LCD Displays
  • Navigation System Displays
  • Video Cameras

Description

The MAX9248/MAX9250 digital video serial-to-parallel converters deserialize a total of 27 bits during data and control phases. In the data phase, the LVDS serial input is converted to 18 bits of parallel video data and in the control phase, the input is converted to 9 bits of parallel control data. The separate video and control phases take advantage of video timing to reduce the serial-data rate. The MAX9248/MAX9250 pair with the MAX9247 serializer to form a complete digital video transmission system. For operating frequencies less than 35MHz, the MAX9248/MAX9250 can also pair with the MAX9217 serializer.

The MAX9248 features spread-spectrum capability, allowing output data and clock to spread over a specified frequency range to reduce EMI. The data and clock outputs are programmable for a spectrum spread of ±4% or ±2%. The MAX9250 features output enable input control to allow data busing.

Proprietary data decoding reduces EMI and provides DC balance. The DC balance allows AC-coupling, providing isolation between the transmitting and receiving ends of the interface. The MAX9248/MAX9250 feature a selectable rising or falling output latch edge.

ESD tolerance is specified for ISO 10605 with ±10kV Contact Discharge and ±30kV Air-Gap Discharge.

The MAX9248/MAX9250 operate from a +3.3V ±10% core supply and feature a separate output supply for interfacing to 1.8V to 3.3V logic-level inputs. These devices are available in a 48-lead LQFP package and are specified from -40°C to +85°C or -40°C to +105°C.

Simplified Block Diagram

MAX9248, MAX9250: Functional Diagram MAX9248, MAX9250: Functional Diagram Zoom icon

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal