Analog Devices Inc./Maxim Integrated MAX9218ETM+

Overview

The MAX9218ETM+ from Maxim Integrated is a 27-bit, 7MHz–35MHz DC-balanced LVDS deserializer that converts serial video and control data into parallel RGB (18-bit) and control (9-bit) outputs. It operates with a +3.3V core supply and supports 1.8V–3.3V output logic levels via separate VCCO. Designed for automotive infotainment links, it pairs with the MAX9217 serializer to enable noise-immune, AC-coupled video transmission over twisted-pair cables.

For engineers reviewing the MAX9218ETM+ datasheet, MAX9218ETM+ pinout, MAX9218ETM+ application, or MAX9218ETM+ equivalent, this page delivers verified functional context, validated pin roles, confirmed ESD ratings (±10kV contact per ISO 10605), exact frequency-range programming behavior (RNG[1:0]), and real-world timing constraints including tDELAY (2.575×tT + 8.5 ns) and PCLK_OUT duty cycle (40%–60%).

Technical Context

The MAX9218ETM+ implements proprietary DC-balanced encoding/decoding to maintain signal integrity across AC-coupled LVDS links, enabling galvanic isolation and reducing common-mode noise. Its dual-phase architecture separates video (RGB_OUT[17:0]) and control (CNTL_OUT[8:0]) deserialization using DE_OUT state, leveraging video blanking intervals for control data recovery.

It features a PLL-based clock recovery system synchronized to REFCLK (±2% tolerance), with lock detection via LOCK output and clock pulse stretching during mode transitions. Output transition times scale with operating frequency (slow for 7–15 MHz, fast for 15–35 MHz), and staggered RGB_OUT switching reduces simultaneous switching noise.

Key Specifications

Pinout & Package

The MAX9218ETM+ is packaged in a 48-lead Thin QFN with exposed pad (EP), optimized for thermal performance and board space in automotive display modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX9248GTJ+ and DS90UB928QSQX/NOPB, the MAX9218ETM+ offers unique DC-balanced deserialization essential for robust AC-coupled automotive links, full compatibility with MAX9217-based systems, and deterministic 7–35 MHz timing without protocol translation overhead.

Availability

The MAX9218ETM+ is available at Aetrix Electronics and suitable for automotive display interfaces, in-vehicle infotainment systems, and industrial LCD timing controllers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MAX9218ETM+ 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) is a semiconductor company specializing in high-performance analog, mixed-signal, and RF solutions for automotive, industrial, and communications markets.

The MAX9218ETM+ belongs to Maxim's automotive-grade LVDS serializer/deserializer product line, engineered specifically for noise-immune digital video transmission in harsh EMI environments such as vehicle cabins and engine compartments.

FAQ

What is the maximum cable length supported by the MAX9218ETM+ at 35 MHz?

The MAX9218ETM+ supports up to 12 meters of CAT5e cable at 35 MHz with bit-error rate (BER) < 10⁻¹², as verified in typical operating conditions using worst-case pattern testing. This assumes proper termination, AC coupling with 0.1 µF capacitors, and shielded twisted-pair cabling. Longer runs require signal integrity analysis and may need equalization or reduced data rate.

Does the MAX9218ETM+ require an external oscillator or can it operate with only the incoming LVDS clock?

The MAX9218ETM+ requires an external REFCLK input for initial PLL lock acquisition before recovering the serial clock. It cannot operate without REFCLK: the device first locks to REFCLK (within 16,385 cycles), then transitions to the recovered serial clock. REFCLK must be within ±2% of the serializer's PCLK_IN frequency and is mandatory for reliable startup.

How does the MAX9218ETM+ handle single-bit errors in control data?

The MAX9218ETM+ applies majority-voting decoding to control bits C0–C4, each transmitted three times per serial word. If one bit flips during transmission, the recovered value is still correct. C5–C8 are passed directly without voting. This design ensures robustness for critical commands like display brightness or camera focus in automotive systems.

Can the MAX9218ETM+ interface directly with a 1.8V FPGA I/O bank?

Yes - the MAX9218ETM+ supports 1.8V to 3.3V logic levels via its dedicated VCCO supply. When VCCO = 1.8V, RGB_OUT[17:0], CNTL_OUT[8:0], DE_OUT, PCLK_OUT, and LOCK meet 1.8V LVCMOS specifications (VOH ≥ 1.7V, VOL ≤ 0.1V at IOL = 100 µA), enabling direct connection to 1.8V FPGA I/O without level shifters.

What is the function of the R/F pin on the MAX9218ETM+?

The R/F pin on the MAX9218ETM+ selects whether RGB_OUT[17:0] and CNTL_OUT[8:0] are latched into downstream logic on the rising edge (R/F = high) or falling edge (R/F = low) of PCLK_OUT. This allows timing alignment with the capture device's setup/hold requirements and does not need to match the MAX9217 serializer's latch polarity.