Analog Devices Inc./Maxim Integrated MAX9291BGTN/V+

Overview

MAX9291BGTN/V+ from Analog Devices is a 3.12Gbps GMSL serializer that converts HDMI 1.4a input to serialized video/audio/control over coax or STP cable, supporting 1920×720p/60Hz with 24-bit color, 192kHz/32-bit audio, and -40°C to +105°C operation for automotive infotainment and camera systems.

For engineers reviewing the MAX9291BGTN/V+ datasheet, MAX9291BGTN/V+ pinout, MAX9291BGTN/V+ application, or MAX9291BGTN/V+ equivalent, key selection criteria include HDMI-to-GMSL conversion capability, programmable pre/deemphasis for 15m cable reach, dual-mode control channel (UART/I2C), spread-spectrum EMI reduction, and GPO support for touch-screen interrupt signaling.

Technical Context

The MAX9291BGTN/V+ implements a full HDMI 1.4a receiver front-end with integrated DDC, input termination, and equalization, feeding a GMSL serializer core operating at up to 3.12Gbps. It supports both coax (50Ω) and STP (100Ω) physical layers with programmable single-ended (100–500mV) or differential (100–400mV) output amplitude.

Its embedded control channel operates in UART-to-UART, UART-to-I2C, or I2C-to-I2C modes at 9.6kbps–1Mbps, enabling real-time register access to local and remote devices independent of video timing. The device includes PRBS generation for BER testing, high-immunity reverse control mode, and configurable sleep/wake-up via dedicated pins.

Key Specifications

Availability

MAX9291BGTN/V+ is available at Aetrix Electronics and suitable for high-resolution automotive navigation, rear-seat infotainment, and megapixel camera systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MAX9291BGTN/V+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving automotive, industrial, communications, and consumer markets since 1965.

The MAX9291BGTN/V+ belongs to Analog Devices' GMSL serializer product line, designed specifically for high-bandwidth, low-latency, EMI-resilient video and audio transport in automotive ADAS and infotainment architectures.

FAQ

What is the primary function of the MAX9291BGTN/V+ in an automotive video system?

The MAX9291BGTN/V+ functions as an HDMI-to-GMSL serializer, converting HDMI 1.4a video, audio, and control signals into a serialized gigabit stream for reliable transmission over 15m+ of coax or STP cable. It enables centralized head-unit HDMI sources to drive distributed displays or cameras while maintaining synchronization, HDCP readiness (via companion MAX9293), and low EMI.

Does the MAX9291BGTN/V+ support both coaxial and shielded twisted-pair cabling?

Yes, the MAX9291BGTN/V+ supports both 50Ω coaxial cable (e.g., FAKRA) and 100Ω shielded twisted-pair (STP) cabling. Output amplitude is programmable: 100–500mV single-ended for coax, or 100–400mV differential for STP. When configured for STP, it maintains backward compatibility with legacy GMSL deserializers.

What audio formats and sample rates does the MAX9291BGTN/V+ support?

The MAX9291BGTN/V+ supports L-PCM I2S stereo and up to eight-channel TDM audio, with sample rates from 32kHz to 192kHz and sample depths up to 32 bits. Audio is extracted directly from HDMI input or accepted via external I2S/TDM interfaces, enabling full 7.1 surround sound transport alongside video without additional audio codecs.

How does the MAX9291BGTN/V+ handle control communication between host and remote devices?

The MAX9291BGTN/V+ provides an embedded bidirectional control channel operating at 9.6kbps–1Mbps in UART-to-UART, UART-to-I2C, or I2C-to-I2C modes. This allows a microcontroller to read/write registers of the MAX9291BGTN/V+, its paired deserializer, and downstream peripherals-regardless of video state-enabling dynamic HDCP management, diagnostics, and configuration updates.

What package type and pin count does the MAX9291BGTN/V+ use?

The MAX9291BGTN/V+ uses a lead(Pb)-free, 56-pin, 8mm × 8mm TQFN/SWTQFN package with exposed thermal pad and 0.5mm lead pitch. This compact, thermally efficient package meets automotive space constraints and supports automated optical inspection and reflow soldering in high-reliability manufacturing environments.