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Analog Devices Inc./Maxim Integrated MAX3815ACCM+
- Part No.:
- MAX3815ACCM+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Video Processing
- Package:
- 48-TQFP Exposed Pad
- Datasheet:
-
MAX3815ACCM+.pdf
- Description:
- IC VIDEO EQUALIZER 48TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,501
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Product details
Overview
MAX3815ACCM+ from Maxim Integrated is a TMDS digital video equalizer IC designed for HDMI/DVI cable signal recovery, supporting data rates up to 2.25Gbps, delivering ≤0.28UI residual output jitter at 2.25Gbps with 24dB skin-effect loss, and extending HDMI 1.3 cable reach to 35m (24 AWG) or 22m (28 AWG). It operates from a single 3.3V supply, features four CML differential I/O channels (three data + one clock), and integrates automatic equalization with loss-of-clock detection.
For engineers reviewing the MAX3815ACCM+ datasheet, MAX3815ACCM+ pinout, MAX3815ACCM+ application, or MAX3815ACCM+ equivalent, this page delivers verified electrical parameters, real-world cable-reach performance, CML interface design meaning, and validated alternative options for HDMI/DVI extender modules and active cable assemblies.
Technical Context
The MAX3815ACCM+ implements three independent adaptive equalizers - one per TMDS data channel - each analyzing incoming signal integrity and applying frequency-dependent gain to compensate for skin-effect losses in copper cables. Its CML input buffers accept 800–1200mVP-P differential swing, while limiting amplifiers ensure clean logic-level outputs before driving CML outputs.
It includes an integrated loss-of-clock (CLKLOS) detector with open-collector LVTTL output, power-down behavior upon clock absence (reducing ICC to 12mA), and configurable output drive via OUTLEVEL (1000/910/500mVP-P) and OUTON (enable/disable). The EQCONTROL pin supports both automatic (GND) and manual (VCC−1V to VCC) equalization tuning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Support | 250Mbps to 2.25Gbps - enables full HDMI 1.3 Deep Color and 1080p60 with 36-bit color without protocol translation. |
| Residual Output Jitter | 0.14–0.28UI at 2.25Gbps - directly determines eye opening margin after equalization; measured with PRBS test pattern and source jitter subtraction. |
| Cable Reach (2.25Gbps) | Up to 35m over 24 AWG HDMI cable - defines maximum passive extension distance before signal degradation causes bit errors. |
| Differential Input Swing | 800–1200mVP-P - sets minimum required signal amplitude from cable to ensure reliable CLKLOS assertion and equalizer convergence. |
| Supply Voltage & Power | 3.3V ±0.3V, 270mA typical ICC - constrains thermal design and PCB decoupling requirements; 0.6W typical dissipation at +70°C. |
| Operating Temperature | 0°C to +70°C - specifies ambient range for commercial-grade HDMI/DVI receiver-side applications like displays and projectors. |
| Package | 48-pin TQFP-EP (7mm × 7mm) - exposes thermal pad for soldered ground connection; requires controlled-impedance 100Ω differential routing on PCB. |
Pinout & Package
The MAX3815ACCM+ uses a 48-pin TQFP-EP package with exposed thermal pad (EP), requiring soldering to PCB ground plane for thermal management and signal reference integrity. Pin 1 is located at top-left corner (see top-view diagram in datasheet); EP must be connected to GND with multiple vias.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RX0_IN+/−, RX1_IN+/−, RX2_IN+/−, RXC_IN+/− | CML differential inputs (data ×3, clock ×1) | Accept degraded TMDS signals from HDMI/DVI cable; require 100Ω differential termination and AC coupling per standard practice. |
| RX0_OUT+/−, RX1_OUT+/−, RX2_OUT+/−, RXC_OUT+/− | CML differential outputs (data ×3, clock ×1) | Drive downstream ASIC or FPGA TMDS receiver; output swing configurable via OUTLEVEL pin and back-termination resistor. |
| EQCONTROL | Analog control input for equalization level | GND = automatic mode; VCC−1V to VCC = manual boost tuning - enables optimization for specific cable length/loss profile. |
| CLKLOS | Open-collector LVTTL loss-of-clock indicator | Asserts low when RXC_IN differential amplitude falls below ~50mVP-P; requires 4.7kΩ pull-up to VCC for system fault monitoring. |
| OUTLEVEL | Three-state digital input for output drive strength | HIGH = 1000mVP-P; OPEN = 910mVP-P with 267Ω back termination; LOW = 500mVP-P - balances EMI, power, and signal integrity. |
| OUTON | LVTTL output enable/disable control | LOW = outputs active; HIGH = forces differential zero - allows hot-plug synchronization and power-gating of TMDS path. |
Key Features
| Feature | Design Value |
|---|---|
| Automatic equalization with no system control | Eliminates need for microcontroller intervention or firmware calibration - reduces BOM count and firmware complexity in plug-and-play extenders. |
| Loss-of-clock detection with auto power-down | Reduces ICC from 270mA to 12mA during cable disconnect - prevents false signaling and lowers standby power in always-on display interfaces. |
| Configurable CML output drive (3 levels) | Supports 500/910/1000mVP-P swing - enables trade-off between signal integrity (back termination), EMI (lower swing), and compatibility with legacy receivers. |
| 2.25Gbps guaranteed performance (HDMI 1.3) | Validated at full Deep Color bandwidth - ensures interoperability with HDMI 1.3-compliant sources and sinks without derating. |
| 7mm × 7mm lead-free TQFP-EP package | Enables compact 4-layer PCB layout for space-constrained active cables and dongles - thermal pad improves θJA by >30% vs. non-EP variant. |
Applications
| HDMI/DVI Active Cable Assembly | HDTV Front-Panel Input Module |
|---|---|
|
Use Scenario: Integrating into USB-C or proprietary active HDMI cables with built-in repeater functionality. IC Role / Device Role / Timing Role: TMDS signal recovery IC placed at cable's receiver end to restore eye opening after 20–35m of 24 AWG STP cable. Use Value: Enables certified 4K@30Hz transmission over lengths exceeding HDMI specification limits without requiring source/sink reconfiguration. |
Use Scenario: Mounted on HDTV main board near HDMI connector to support long internal flex-cable routing. IC Role / Device Role / Timing Role: Front-end equalizer for HDMI receiver ASIC, compensating for impedance discontinuities and trace loss on motherboard. Use Value: Maintains <0.25UI jitter margin at 2.25Gbps, preventing pixel dropouts and audio sync loss during high-resolution playback. |
| Projector HDMI Input Extender Box | LCD Monitor Dual-Link DVI Interface |
|
Use Scenario: Standalone enclosure housing MAX3815ACCM+ and MAX3816A DDC extender for conference room projector installations. IC Role / Device Role / Timing Role: Signal conditioning stage that restores TMDS integrity before feeding projector's native HDMI PHY. Use Value: Extends usable cable run to 120ft (36.6m) using 24 AWG shielded twin-ax, eliminating need for fiber or powered repeaters. |
Use Scenario: Dual MAX3815ACCM+ implementation on high-resolution industrial monitor supporting QXGA (2048×1536) via dual-link DVI. IC Role / Device Role / Timing Role: One IC per DVI link (data lanes 0–2 and 3–5), sharing common clock path to maintain inter-lane skew <100ps. Use Value: Preserves timing alignment across six data channels, enabling stable image rendering without horizontal tearing or color banding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TMDS equalization applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI TDP142 | Supports up to 3.4Gbps (HDMI 2.0), lower 0.12UI jitter at 2.25Gbps, but requires 1.8V/3.3V dual supply and has different pinout. | Targeted at HDMI 2.0/2.1 systems; not pin-compatible; needs layout redesign and updated power sequencing. | Select TDP142 only when upgrading to HDMI 2.0 bandwidth or when lower jitter is critical; MAX3815ACCM+ remains optimal for cost-sensitive HDMI 1.3 designs. |
| Pericom PI3HDX1204A | Quad-channel 1.65Gbps repeater with integrated 5V tolerance; lacks automatic equalization - requires external configuration register writes. | Suitable for fixed-length short-run extenders where cable loss is predictable; no dynamic adaptation to varying cable quality. | Choose PI3HDX1204A for legacy DVI-D systems with known 15m cable runs and existing I²C infrastructure; MAX3815ACCM+ preferred for variable-length HDMI deployments. |
Compared with TI TDP142 and Pericom PI3HDX1204A, the MAX3815ACCM+ offers unique single-supply operation, fully autonomous equalization, and proven 35m reach at 2.25Gbps - making it the most direct fit for HDMI 1.3 active cable and extender applications without firmware or dual-rail complexity.
Availability
MAX3815ACCM+ is available at Aetrix Electronics and suitable for HDMI/DVI active cable assemblies, front-projector input modules, and LCD monitor interface extensions requiring stable component supply across industrial temperature validation cycles and multi-year production ramps.
Supply support for MAX3815ACCM+ 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 U.S.-based semiconductor company specializing in high-performance analog, mixed-signal, and RF ICs for precision signal conditioning and power management.
The MAX3815A product line was engineered specifically for HDMI/DVI physical-layer signal integrity restoration in consumer and professional AV equipment - targeting cable-length limitations inherent in copper-based TMDS interfaces.
FAQ
What is the maximum supported data rate for MAX3815ACCM+?
The MAX3815ACCM+ is guaranteed to operate at up to 2.25Gbps per TMDS channel, fully compliant with HDMI 1.3 Deep Color specifications. This rate supports 1080p60 with 36-bit color depth and is validated across the full 0°C to +70°C operating range with ≤0.28UI residual jitter under worst-case 24dB skin-effect loss conditions. The MAX3815ACCM+ does not support HDMI 2.0 or higher data rates.
Does MAX3815ACCM+ require external configuration to function?
No, the MAX3815ACCM+ operates autonomously in default configuration: connecting EQCONTROL to GND enables fully automatic equalization with no host processor involvement. All adaptive functions - including loss-of-clock detection, power-down, and output drive adjustment - execute internally. Only optional features like manual EQ tuning or output level selection require external pin biasing; the MAX3815ACCM+ delivers full functionality with minimal external components.
How does the CLKLOS pin behave when the HDMI cable is disconnected?
When the HDMI cable is disconnected, the differential clock amplitude at RXC_IN+/− drops below ~50mVP-P, causing the MAX3815ACCM+ to assert CLKLOS low within microseconds. This triggers automatic power-down, reducing supply current from 270mA to 12mA and placing all CML outputs in high-impedance state. The CLKLOS pin remains low until valid clock signal is restored, providing a hardware-level fault indication usable for system-level status reporting.
Can MAX3815ACCM+ be used with both HDMI and DVI-D sources?
Yes, the MAX3815ACCM+ is protocol-agnostic and compatible with any TMDS-encoded signal, including HDMI 1.3, DVI-D, DFP, PanelLink, and ADC. It processes the physical layer only - no HDCP, audio packet, or EDID handling - so it transparently supports both HDMI and DVI-D sources and sinks. Verified operation includes 720p, 1080i, 1080p, and computer resolutions from VGA through WUXGA.
What is the purpose of the exposed pad (EP) on the MAX3815ACCM+ package?
The exposed pad on the MAX3815ACCM+ TQFP-EP package serves dual thermal and electrical functions: it provides a low-thermal-resistance path to dissipate up to 0.6W of power, and it is internally connected to GND, requiring soldering to the PCB ground plane with ≥4 thermal vias. Omitting EP grounding degrades jitter performance and risks thermal shutdown; proper EP connection is mandatory for specified operation across the full temperature range.
MAX3815ACCM+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-TQFP Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Equalizer
- Applications:
- Consumer Video
- Standards:
- -
- Control Interface:
- Serial
- Voltage - Supply:
- 3.0V ~ 3.6V
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 48-TQFP-EP (7x7)
MAX3815ACCM+ FAQ
1.How can I place an order for MAX3815ACCM+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3815ACCM+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX3815ACCM+ reliable?
The price and inventory of MAX3815ACCM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3815ACCM+ is usually 5 days.
3.What payment methods are accepted for MAX3815ACCM+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3815ACCM+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3815ACCM+?
MAX3815ACCM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3815ACCM+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX3815ACCM+?
For technical support, including MAX3815ACCM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3815ACCM+ requirements.
6.How does Aetrix verify that MAX3815ACCM+ is sourced from the original manufacturer or authorized distributors?
All MAX3815ACCM+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX3815ACCM+ meets industry standards.
7.What is the process for return or replacement of MAX3815ACCM+?
All MAX3815ACCM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX3815ACCM+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX3815ACCM+ part is unused and in its original packaging.
Return procedure for MAX3815ACCM+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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