Analog Devices Inc./Maxim Integrated MAX9257AGCM/V+

Overview

MAX9257AGCM/V+ from Maxim Integrated is a fully programmable 10–18-bit parallel-to-serial video serializer with UART/I²C control channel, LVDS serial output, and integrated GPIO (up to 10 pins). It operates from a +3.3V core supply and +1.8V to +3.3V I/O supply, supports pixel clock frequencies from 5MHz to 70MHz, delivers up to 840Mbps serial data rate, and enables AC-coupled transmission over STP cables up to 20m using preemphasis. It is used in automotive camera links where compact size, ESD robustness, and bidirectional control over the same differential pair are critical.

For engineers reviewing the MAX9257AGCM/V+ datasheet, MAX9257AGCM/V+ pinout, MAX9257AGCM/V+ application, or MAX9257AGCM/V+ equivalent, key selection considerations include its programmable parallel width (10/12/14/16/18-bit), spread-spectrum capability, DC-balanced coding for AC coupling, integrated PLL jitter filtering, and support for remote GPIO configuration via the embedded control channel.

Technical Context

The MAX9257AGCM/V+ implements a dual-PLL architecture: a filter PLL (FPLL) for PCLK_IN jitter suppression and a spread-spectrum PLL (SPLL) for EMI reduction. Its control channel operates bidirectionally during video blanking over the same LVDS pair used for video data, eliminating need for separate CAN/LIN interfaces.

It supports programmable edge polarity for HSYNC/VSYNC/clock signals, parity protection on both video and control channels, and on-chip PRBS generation/checking for link integrity validation. The device integrates a 10-channel GPIO bank configurable as inputs or outputs, with internal pull-downs on unassigned DIN pins.

Key Specifications

Pinout & Package

The MAX9257AGCM/V+ is housed in a 40-pin TQFN package (5mm × 5mm, exposed pad), pin-compatible with the MAX9257A family. The exposed pad must be soldered to GND for thermal and electrical performance.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serializer applications.

Compared with MAX9257A/V+ and DS90UB953TRGCRQ1, the MAX9257AGCM/V+ uniquely combines programmable spread spectrum, 10-channel GPIO, and bidirectional control channel in a single 40-pin TQFN - making it optimal for cost-sensitive, space-constrained automotive camera modules requiring field-upgradable configuration.

Availability

MAX9257AGCM/V+ is available at Aetrix Electronics and suitable for automotive cameras, ADAS systems, and industrial machine vision applications requiring stable component supply, AEC-Q100-compliant sourcing, and long-term lifecycle assurance.

Supply support for MAX9257AGCM/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

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

The MAX9257AGCM/V+ belongs to Maxim's GMSL-adjacent serializer family, engineered specifically for high-reliability video links in safety-critical automotive environments with emphasis on ESD resilience, thermal stability, and embedded diagnostics.

FAQ

What is the maximum serial data rate supported by the MAX9257AGCM/V+?

The MAX9257AGCM/V+ supports a maximum serial data rate of 840Mbps. This is achieved at a 70MHz pixel clock with an 18-bit parallel word (including two encoding bits), enabling high-fidelity video transmission for 1080p60 applications. The device dynamically adjusts word length to maintain this rate across lower pixel clock frequencies, such as 400Mbps at 28.57MHz.

Does the MAX9257AGCM/V+ require an external reference clock at the deserializer end?

No, the MAX9257AGCM/V+ does not require an external reference clock at the deserializer end. Its paired deserializer (e.g., MAX9258A) recovers the clock directly from the incoming serial data stream using an integrated PLL - eliminating the need for a separate clock line and simplifying PCB layout and cable harness design.

How many GPIOs are available on the MAX9257AGCM/V+, and how are they configured?

The MAX9257AGCM/V+ provides up to 10 GPIOs (GPIO[0:9]). These are implemented on DIN[0:7], DIN8/GPIO0, DIN15/GPIO7, GPIO8, and GPIO9. When not assigned as data inputs based on programmed serial word length, DIN pins automatically function as GPIOs with internal pull-downs. Configuration is performed via the embedded UART/I²C control channel.

Can the MAX9257AGCM/V+ drive 20m STP cables reliably?

Yes, the MAX9257AGCM/V+ supports reliable operation over 20m STP cables using programmable preemphasis levels (up to 100%). Combined with DC-balanced coding and spread-spectrum modulation, it achieves bit error rates below 10⁻⁹ at 840Mbps over 20m - validated per manufacturer characterization data and widely deployed in automotive rear-view camera systems.

What is the purpose of the REM pin on the MAX9257AGCM/V+?

The REM (Remote Enable) pin on the MAX9257AGCM/V+ controls the device's power-up sequencing. When grounded, power-up follows VCC assertion. When pulled high to VCC via a 10kΩ resistor, it enables remote wake-up by an electronic control unit (ECU), allowing the camera module to remain in low-power state until commanded - essential for vehicle-level power management and ASAM-compliant sleep/wake protocols.