Analog Devices Inc./Maxim Integrated MAX9259GCB/V+T

Overview

MAX9259GCB/V+T from Maxim Integrated is a gigabit multimedia serializer for automotive serial video links, supporting up to 3.125Gbps over STP cable, 18-/24-bit RGB video up to XGA (1280×768), embedded I²S audio (up to 192kHz/32-bit), and full-duplex UART control channel (100kbps–1Mbps). It operates from 1.8V core and 1.8V–3.3V I/O supplies in a 64-pin TQFP-EP package, qualified per AEC-Q100 for -40°C to +105°C.

For engineers reviewing the MAX9259GCB/V+T datasheet, MAX9259GCB/V+T pinout, MAX9259GCB/V+T application, or MAX9259GCB/V+T equivalent, key selection criteria include serializer-side control-channel configuration (CDS/MS/AUTOS), preemphasis tuning for 15m STP reach, spread-spectrum EMI reduction, line-fault monitoring (LMN0/LMN1/LFLT), and compliance with ISO 10605 (±10kV contact) and IEC 61000-4-2 (±10kV contact) ESD standards.

Technical Context

The MAX9259GCB/V+T implements a CML-based high-speed serializer with programmable preemphasis (0x00–0x0F settings), PLL-based clock multiplication from PCLKIN (6.25MHz–104MHz), and integrated PRBS BER tester for link validation. Its reverse control channel uses differential UART signaling over the same physical link, enabling bidirectional I²C/UART bridging between host MCU and remote peripherals.

It supports dual-mode parallel interface operation: 24-bit mode (DIN0–DIN20) with BWS = low, or 32-bit mode (DIN0–DIN28) with BWS = high; edge-trigger selection (ES) and data-rate range (DRS) allow precise timing alignment across varying pixel clocks and cable lengths. Spread spectrum (SSEN) is configurable at power-up and reduces spectral peaks without affecting jitter performance.

Key Specifications

Pinout & Package

MAX9259GCB/V+T is housed in a 64-pin TQFP package (10mm × 10mm × 1mm) with exposed pad (EP) connected internally to AGND. Thermal and electrical performance requires external connection of EP to the analog ground plane.

Key Features

Applications

Availability

MAX9259GCB/V+T is available at Aetrix Electronics and suitable for high-resolution automotive navigation, rear-seat infotainment, and megapixel camera systems requiring stable component supply, AEC-Q100 qualification, and long-cable serial link reliability.

Supply support for MAX9259GCB/V+T 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

Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for automotive, industrial, and communications markets.

The MAX9259GCB/V+T belongs to Maxim's GMSL (Gigabit Multimedia Serial Link) family, engineered specifically for high-bandwidth, low-latency, EMI-resilient video and control transport in automotive ADAS and infotainment systems.

FAQ

What is the maximum supported cable length for MAX9259GCB/V+T at full 3.125Gbps data rate?

The MAX9259GCB/V+T supports up to 15m of shielded twisted-pair (STP) cable at 3.125Gbps when using optimal preemphasis (e.g., 3.3dB setting) and equalization. Performance depends on cable quality and termination; typical BER < 10⁻⁹ is guaranteed at 15m with proper layout and grounding. For longer runs, lower data rates or enhanced equalization may be required.

Does MAX9259GCB/V+T support both I²C and UART protocols on its control channel?

Yes, the MAX9259GCB/V+T supports both I²C and UART protocols on its RX/SDA and TX/SCL pins. Protocol selection is determined by external configuration and firmware - UART mode uses standard asynchronous framing, while I²C mode implements master functionality with SDA/SCL timing compliant to standard I²C specifications. The CDS pin defines which side hosts the FC (functional controller).

How does the line-fault detection feature work on MAX9259GCB/V+T?

The MAX9259GCB/V+T uses LMN0 and LMN1 pins to monitor STP cable health by measuring voltage thresholds indicative of short-to-GND, open, or short-to-battery conditions. These analog inputs feed an internal comparator; detection results drive the open-drain LFLT output low. This enables real-time cable diagnostics without requiring external ADCs or microcontroller polling.

Can MAX9259GCB/V+T operate with a 3.3V I/O supply?

Yes, the MAX9259GCB/V+T supports IOVDD from 1.7V to 3.6V, including 3.3V. All single-ended I/O pins (e.g., RX/SDA, TX/SCL, PWDN, SSEN) are compatible with 3.3V logic levels when IOVDD = 3.3V. However, core supplies AVDD and DVDD must remain at 1.7V–1.9V; only the I/O domain is 3.3V-tolerant.

Is MAX9259GCB/V+T pin-compatible with other devices in the MAX9259/MAX9260 family?

The MAX9259GCB/V+T shares the same 64-pin TQFP-EP footprint and pinout with other MAX9259 variants (e.g., MAX9259GCB/V+, MAX9259GTN/V+T), but is not pin-compatible with MAX9260 deserializers due to differing signal roles (e.g., DIN vs. DOUT, PCLKIN vs. PCLKOUT). Always verify pin function mapping against the specific device's datasheet before PCB reuse.