MAX9247GCM+

Serializers, Deserializers Overview

The MAX9247GCM+ is a digital video parallel-to-serial converter designed for high-speed data transmission. It serializes 27 bits of parallel data, comprising 18 bits of RGB video and 9 bits of control data, into a single LVDS stream. The device operates with a parallel clock frequency ranging from 2.5MHz to 42MHz, resulting in a maximum serial data rate of 840Mbps. It utilizes proprietary encoding to maintain DC balance and reduce electromagnetic interference. The component functions within a temperature range of -40°C to +105°C and requires a +3.3V core supply voltage.

Serializers, Deserializers Feature Summary

• Proprietary data encoding ensures DC balance and reduces electromagnetic emissions
• Integrated preemphasis capability improves signal integrity and eye diagram quality
• Supports AC-coupling through DC-balanced signaling for interface isolation
• Includes programmable phase-shifted LVDS signaling to minimize EMI

Serializers, Deserializers Applications

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

Serializers, Deserializers Procurement Notes

Verify the specific suffix 'GCM+' corresponds to the industrial temperature grade (-40°C to +105°C) rather than the commercial variant. Confirm RoHS compliance status as indicated by the '+' designation. Ensure the package type matches the required 48-lead LQFP footprint for PCB layout compatibility.

Serializers, Deserializers Selection Notes

Select this serializer when interfacing with MAX9248 or MAX9250 deserializers for complete video links. Ensure the application requires a parallel clock frequency between 2.5MHz and 42MHz. Verify that the input logic levels are compatible with the separate VCCIN supply range of 1.71V to 3.6V.

Serializers, Deserializers Part Context

This component belongs to the Maxim Integrated GMSL (Gigabit Multimedia Serial Link) family. It is specifically engineered to pair with corresponding deserializers like the MAX9248/MAX9250. The device addresses the need for long-distance, low-EMI digital video transmission using standard twisted-pair cabling.

Serializers, Deserializers Replacement Considerations

The MAX9247ECM+ serves as a direct functional substitute but is rated for a lower operating temperature range of -40°C to +85°C. Ensure thermal requirements are met before substituting the commercial grade part for the industrial grade MAX9247GCM+.

Serializers, Deserializers FAQ

How does the MAX9247 handle control data transmission?

Control data is serialized during the video blanking period. Inputs C0 to C4 are mapped to three bits each to provide single-bit-error tolerance, while inputs C5 to C8 are mapped to one bit each.

What is the purpose of the CMF pin?

The Common-Mode Filter (CMF) pin allows connection of an optional capacitor to ground. This filters common-mode switching noise from the integrated 100Ω output termination, thereby reducing electromagnetic interference.

Can the MAX9247 operate without external termination resistors?

Yes, the device features an internally terminated 100Ω differential output resistor. This eliminates the need for external series or parallel termination resistors at the serializer output.