MAX9247ECM/V+T

Serializers, Deserializers Overview

The MAX9247ECM/V+T is a 27-bit, DC-balanced LVDS serializer designed for digital video transmission. It operates with a parallel clock frequency ranging from 2.5MHz to 42MHz (MAX9247ECM) or up to 35MHz (MAX9247GCM), serializing 18 bits of video data and 9 bits of control data into a single LVDS stream. The device features a +3.3V core supply and a separate input supply supporting 1.71V to 3.6V logic levels. It includes proprietary encoding for DC balance, preemphasis for signal integrity, and an integrated 100Ω output termination. ESD protection meets ISO 10605 ±10kV contact and ±30kV air-gap standards. Available in a 48-lead LQFP package.

Serializers, Deserializers Feature Summary

• Proprietary data encoding ensures DC balance and reduces electromagnetic interference.
• Integrated preemphasis improves eye diagram quality and signal integrity at the output.
• Control data inputs C0 to C4 provide single-bit-error tolerance during transmission.
• Programmable phase-shifted LVDS signaling and output common-mode filter reduce EMI.

Serializers, Deserializers Applications

• Navigation system displays
• In-vehicle entertainment systems
• Video cameras
• LCD displays

Serializers, Deserializers Procurement Notes

Verify the specific suffix against the manufacturer's current ordering information to confirm temperature range and automotive qualification status. The /V suffix indicates automotive qualification. Ensure the component matches the required operating temperature range (-40°C to +85°C or -40°C to +105°C) for the target application environment before finalizing procurement.

Serializers, Deserializers Selection Notes

Select the MAX9247ECM variant for applications requiring parallel clock frequencies up to 42MHz. Choose the MAX9247GCM variant if the maximum operating frequency is limited to 35MHz but requires operation up to +105°C. Ensure the design supports the necessary power supply sequencing between the serializer and deserializer to maintain link stability during power-up.

Serializers, Deserializers Part Context

The MAX9247 is part of a digital video serial link family that pairs with deserializers such as the MAX9248 and MAX9250. It converts parallel RGB and control data into a serialized LVDS stream for transmission over twisted-pair cables or controlled-impedance PCB traces. The device is designed to minimize EMI while maintaining high signal integrity for automotive and industrial video applications.

Serializers, Deserializers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify compatibility with existing deserializers like the MAX9248 or MAX9250 when considering alternative serializers within the same product family.

Serializers, Deserializers FAQ

How does the MAX9247 handle DC balance in the serial data stream?

The MAX9247 uses proprietary data encoding to serialize 18 bits of video data and 9 bits of control data. This encoding process maintains DC balance across the serial cable, allowing for AC-coupling which provides isolation between the transmitting and receiving ends of the interface.

What is the function of the PRE pin on the MAX9247?

The PRE pin enables the preemphasis mode. Driving this pin high adds extra current to the output during data transitions, increasing the amplitude by 40% to 50%. This improves the transition speed, eye diagram, and overall signal integrity.

Can the MAX9247 be used with the MAX9218 deserializer?

Yes, for operating frequencies less than 35MHz, the MAX9247 can pair with the MAX9218 deserializer. For frequencies up to 42MHz, it is designed to pair with the MAX9248 or MAX9250 deserializers.