Analog Devices Inc./Maxim Integrated MAX9217ETM+

Overview

MAX9217ETM+ from Maxim Integrated is a 27-bit, 3MHz–35MHz DC-balanced LVDS serializer that converts 18-bit RGB video and 9-bit control data into a single serial stream for high-integrity transmission over twisted-pair or controlled-impedance PCB traces. It features proprietary DC-balanced encoding, integrated 100Ω LVDS termination, ±2% reference clock tolerance, and operates from +3.3V core supply with separate 1.8V–3.3V input logic supply. It is used in automotive in-vehicle displays requiring EMI reduction and AC-coupled isolation.

For engineers reviewing the MAX9217ETM+ datasheet, MAX9217ETM+ pinout, MAX9217ETM+ application, or MAX9217ETM+ equivalent, key selection criteria include its 48-pin Thin QFN-EP package, 700Mbps max serial data rate, ISO 10605 ±10kV contact/±30kV air ESD rating, -40°C to +85°C temperature range, and compatibility with the MAX9218 deserializer in serial video links.

Technical Context

The MAX9217ETM+ implements a PLL-based parallel-to-serial conversion architecture with dual-phase latching: RGB_IN[17:0] is sampled when DE_IN is high, and CNTL_IN[8:0] when DE_IN is low. Its proprietary encoding inserts transition words at video/control boundaries and embeds overhead bits (EN0/EN1) to ensure DC balance and reduce EMI.

It supports four selectable frequency ranges via RNG[1:0], enabling optimized PLL lock and jitter performance across 3–35MHz PCLK_IN. The LVDS output includes internal 100Ω termination and a CMF pin for optional common-mode filtering, allowing AC-coupling with up to 10m STP cable drive capability.

Key Specifications

Pinout & Package

MAX9217ETM+ is housed in a 48-lead Thin QFN-EP package with exposed pad (EP) for thermal dissipation and grounding. Pin count and physical layout match the LQFP variant but with reduced footprint and improved thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9217ETM+, the MAX9217ECM+ offers identical functionality in a larger LQFP package-ideal for evaluation but less suitable for production automotive modules where thermal performance and board space matter. The MAX9247 provides higher bandwidth and advanced EMI features but requires new layout, firmware, and validation effort.

Availability

MAX9217ETM+ is available at Aetrix Electronics and suitable for automotive navigation displays, in-vehicle entertainment systems, and industrial LCD interfaces requiring stable component supply, RoHS-compliant packaging, and extended temperature support.

Supply support for MAX9217ETM+ 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 high-speed interface ICs for automotive, industrial, and communications applications.

The MAX9217ETM+ belongs to Maxim's automotive-qualified high-speed serializer product line, engineered specifically for noise-immune, long-cable digital video transport in safety-critical and EMI-sensitive vehicle subsystems.

FAQ

What is the maximum serial data rate supported by the MAX9217ETM+?

The MAX9217ETM+ supports a maximum serial data rate of 700Mbps, achieved when operating at the highest PCLK_IN frequency range (20MHz–35MHz) with RNG[1:0] = 11. This rate accommodates high-resolution video formats such as WXGA (1280×800) with pixel clock up to 35MHz and embedded control data, making it suitable for automotive infotainment displays. The actual data rate scales linearly with PCLK_IN within each selected frequency band.

Does the MAX9217ETM+ require external termination resistors on the LVDS output?

No, the MAX9217ETM+ includes an integrated 100Ω differential termination resistor between OUT+ and OUT-, eliminating the need for external termination components. This internal termination remains active when PWRDWN is high and is switched out during power-down mode. The resistor is designed to match standard 100Ω differential transmission lines, simplifying PCB layout and improving signal integrity without additional BOM items.

Can the MAX9217ETM+ interface directly with 1.8V logic inputs?

Yes, the MAX9217ETM+ supports 1.8V logic inputs via its dedicated VCCIN supply pin (Pin 2), which accepts 1.71V to 3.6V. When VCCIN = 1.8V, the input thresholds are scaled accordingly (VIH ≥ 0.65×VCCIN ≈ 1.17V, VIL ≤ 0.3×VCCIN ≈ 0.54V), ensuring reliable recognition of 1.8V LVTTL/LVCMOS signals from processors or FPGAs. This eliminates level-shifting circuitry in mixed-voltage systems.

How does the MAX9217ETM+ handle ESD protection, and is it automotive-qualified?

The MAX9217ETM+ is rated for ISO 10605 ESD protection at ±10kV contact discharge and ±30kV air discharge on its LVDS outputs, meeting stringent automotive electronics requirements. It also complies with Human Body Model (±2kV) and Machine Model (±200V) standards. While the MAX9217ETM+ itself is not explicitly marked as AEC-Q100 qualified, its -40°C to +85°C operating range, robust ESD rating, and automotive-targeted features align with Tier-1 supplier interface needs; the /V automotive-grade variant (e.g., MAX9217ECM/V+) carries formal qualification.

What is the purpose of the CMF pin on the MAX9217ETM+?

The CMF (Common-Mode Filter) pin on the MAX9217ETM+ connects to the midpoint of the internal 50Ω/50Ω LVDS termination network. Adding a small capacitor (e.g., 1nF–10nF) from CMF to ground provides a low-impedance path for high-frequency common-mode noise generated by the LVDS driver, effectively reducing radiated EMI. This feature is especially valuable in automotive environments where strict EMC limits apply and helps maintain signal integrity without altering the differential output swing.