27-Bit, 2.5MHz-to-42MHz DC-Balanced LVDS Serializer

The MAX9247 digital video parallel-to-serial converter serializes 27 bits of parallel data into a serial-data stream. Eighteen bits of video data and 9 bits of control data are encoded and multiplexed onto the serial interface, reducing the serial-data rate. The data-enable input determines when the video or control data is serialized.

The MAX9247 pairs with the MAX9248/MAX9250 deserializers to form a complete digital video serial link. Interconnect can be controlled-impedance PCB traces or twisted-pair cable. Proprietary data encoding reduces EMI and provides DC balance. DC balance allows AC-coupling, providing isolation between the transmitting and receiving ends of the interface. The LVDS output is internally terminated with 100Ω. For operating frequencies less than 35MHz, the MAX9247 can also pair with the MAX9218 deserializer.

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

The MAX9247 operates from a +3.3V core supply and features a separate input supply for interfacing to 1.8V to 3.3V logic levels. This device is available in a 48-lead LQFP package and is specified from -40°C to +85°C or -40°C to +105°C.

Applications

* In-Vehicle Entertainment Systems * LCDs * Navigation System Displays * Video Cameras

* Preemphasis Improves Eye Diagram and Signal Integrity at the Output

* Proprietary Data Encoding for DC Balance and Reduced EMI

* Control Data Sent During Video Blanking

* Five Control Data Inputs are Single-Bit-Error Tolerant

* Programmable Phase-Shifted LVDS Signaling Reduces EMI

* Output Common-Mode Filter Reduces EMI

* Greater Than 10m STP Cable Drive

* Wide ±2% Reference Clock Tolerance

* ISO 10605 and IEC 61000-4-2 Level 4 ESD Protection

* Separate Input Supply Allows Interface to 1.8V to 3.3V Logic

* +3.3V Core Supply

* Space-Saving LQFP Package

* -40°C to +85°C and -40°C to +105°C Operating Temperature Ranges