MAX9248ETM+T

Serializers, Deserializers Overview

The MAX9248ETM+T is a 27-bit DC-balanced LVDS deserializer from Analog Devices/Maxim Integrated, operating at parallel clock frequencies of 5MHz to 42MHz. It converts serial LVDS data into 18 bits of video and 9 bits of control data. The device uses a +3.3V core supply with a separate VCCO output supply for 1.8V to 3.3V logic interfacing. It features programmable ±2% or ±4% spread-spectrum capability to reduce EMI, single-bit-error tolerant control inputs, and selectable rising/falling latch edges. Packaged in a 48-lead LQFP, it operates from -40°C to +85°C or -40°C to +105°C.

Serializers, Deserializers Feature Summary

• Proprietary data decoding ensures DC balance and enables AC-coupling for interface isolation.
• Programmable spread-spectrum output reduces electromagnetic interference (EMI).
• Control data deserialized during video blanking with single-bit-error tolerance.
• Staggered output switching and scaled transition times minimize EMI.

Serializers, Deserializers Applications

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

Serializers, Deserializers Procurement Notes

Verify the specific suffix ETM+T against official documentation to confirm package type and temperature range. Confirm RoHS compliance status as required by local regulations. Check current availability through authorized distributors, as lead times may vary based on manufacturing allocation.

Serializers, Deserializers Selection Notes

Select this component when a 27-bit LVDS deserialization solution is required for automotive or industrial displays. Ensure the system frequency falls within the 5MHz to 42MHz range. Verify that the host logic voltage levels are compatible with the separate VCCO supply configuration.

Serializers, Deserializers Part Context

This part belongs to the MAX9248/MAX9250 family of digital video serializers and deserializers. It pairs with the MAX9247 serializer for complete transmission systems. The MAX9248 variant specifically includes spread-spectrum functionality, distinguishing it from the MAX9250 which offers output enable busing instead.

Serializers, Deserializers Replacement Considerations

The MAX9250ETM+T is a functional alternative if spread-spectrum is not needed but output busing via OUTEN is required. Both share the same pinout and core deserialization architecture.

Serializers, Deserializers FAQ

How does the MAX9248 handle control data?

Control data is deserialized during the video blanking phase. Inputs C0 to C4 use majority voting for single-bit-error tolerance, while C5 to C8 do not.

What is the purpose of the SS input?

The SS input controls the spread-spectrum modulation. Driving it high enables ±4% spread, while pulling it low enables ±2% spread to reduce EMI.

Can the outputs be bused?

No, the MAX9248 does not have an output enable input. Output busing is a feature available only in the MAX9250 variant.