MAX9250GCM+

Serializers, Deserializers Overview

The MAX9250GCM+ is a 27-bit DC-balanced LVDS deserializer operating at parallel clock frequencies from 5MHz to 42MHz. It converts a single LVDS serial input into 18 bits of parallel video data and 9 bits of parallel control data. The device features a separate output supply (VCCO) supporting logic levels from 1.8V to 3.3V, while the core operates on a +3.3V ±10% supply. It includes an output enable input for busing applications and provides ISO 10605 ESD protection with ±10kV contact discharge tolerance. The component is housed in a 48-lead LQFP package and supports industrial temperature ranges.

Serializers, Deserializers Feature Summary

• Proprietary data decoding ensures DC balance and reduces electromagnetic interference.
• Output enable input allows multiple devices to bus outputs together.
• Control data is deserialized during video blanking periods.
• Supports selectable rising or falling output latch edges.

Serializers, Deserializers Applications

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

Serializers, Deserializers Procurement Notes

Verify the specific suffix GCM against the manufacturer's current production status, as availability may vary by region. Confirm that the required operating temperature range matches the -40°C to +105°C specification for this package variant. Ensure the design accounts for the separate VCCO power domain requirements.

Serializers, Deserializers Selection Notes

Select the MAX9250GCM+ when output busing capability is required, distinguishing it from the spread-spectrum enabled MAX9248. Verify that the reference clock frequency falls within the 5MHz to 42MHz operational window. Ensure the target logic interface voltage is compatible with the 1.8V to 3.3V VCCO supply range.

Serializers, Deserializers Part Context

This component belongs to the MAX9248/MAX9250 family of digital video serial-to-parallel converters. It is designed to pair with the MAX9247 serializer to form a complete transmission system. For frequencies below 35MHz, it can also interface with the MAX9217 serializer. The GCM suffix denotes the extended industrial temperature grade.

Serializers, Deserializers Replacement Considerations

The MAX9248GCM+ is a functional alternative if spread-spectrum capabilities are needed instead of output busing. The MAX9250ECM+ offers the same functionality in the commercial temperature range. Verify pin compatibility and software configuration differences before substitution.

Serializers, Deserializers FAQ

How does the MAX9250 handle output busing?

The MAX9250 features an OUTEN input that places outputs in high impedance when low, allowing multiple devices to share a bus. A 30ns delay is required between disabling one device and enabling another to avoid contention.

What is the purpose of the DE_OUT signal?

DE_OUT indicates whether the device is currently outputting video data (high) or control data (low). Video data appears on RGB_OUT when high, while control data appears on CNTL_OUT when low.

How is EMI reduced in this device?

EMI is reduced through proprietary data decoding that maintains DC balance, staggered output switching where RGB groups switch approximately 1ns apart, and scaled output transition times based on the operating frequency.