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Analog Devices Inc./Maxim Integrated MAX3814CHJ+T
- Part No.:
- MAX3814CHJ+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 32-TQFP
- Datasheet:
-
MAX3814CHJ+T.pdf
- Description:
- IC INTERFACE SPECIALIZED 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:206
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Product details
Overview
MAX3814CHJ+T from Maxim Integrated is a 4-channel DVI/HDMI TMDS equalizer and driver IC designed to compensate for FR-4 board trace and cable losses up to 15dB at 825MHz, deliver ≤0.2UIP-P residual jitter at 1.65Gbps, and support selectable 10mA/15mA CML output current via the LEVEL pin - deployed in laptop docking stations and HDMI cable receivers to restore signal integrity across long interconnects.
For engineers reviewing the MAX3814CHJ+T datasheet, MAX3814CHJ+T pinout, MAX3814CHJ+T application, or MAX3814CHJ+T equivalent, this page delivers verified electrical parameters, real-world channel loss compensation data, CML input/output interface behavior, layout-critical termination guidance, and validated alternatives for DVI/HDMI signal integrity design.
Technical Context
The MAX3814CHJ+T integrates four independent CML input buffers, fixed-gain equalizers, limiting amplifiers, and CML output drivers - each channel fully configurable as clock or data path. Its equalization compensates dielectric and skin-effect losses in FR-4 microstrip (up to 80 inches) and 24–28 AWG cables (up to 33 ft), with deterministic jitter reduction confirmed across 0.25–2.25Gbps data rates.
It operates from a single 3.3V supply, accepts 700–1400mVP-P differential input swing, and delivers 1.05VP-P differential output with 80–230ps rise/fall times. The ENABLE pin provides LVTTL-active-low power-down control, while the LEVEL pin selects 10mA (no back termination) or 15mA (200Ω differential back termination) output drive to achieve ≥10dB return loss at DVI/HDMI connectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 0.25Gbps to 1.65Gbps (supports HDMI 1.3; tested up to 2.25Gbps on Spectra Strip cable) |
| Channel Loss Compensation | Up to 15dB at 825MHz - enables reliable operation over 80in FR-4 or 30ft 28AWG cable |
| Residual Jitter | ≤0.2UIP-P at 1.65Gbps with 0–15dB channel loss - ensures clean eye opening at receiver |
| Differential Output Swing | 1.05VP-P (10mA mode); maintained at 1.05VP-P even in 15mA mode with 200Ω back termination |
| Input Termination | 50Ω to VCC per side - matches standard CML source impedance without external resistors |
| Supply Voltage | 3.0V to 3.6V - compatible with standard DVI/HDMI 3.3V rail; absolute max signal rating = 5.5V |
| Operating Temperature | 0°C to +70°C - commercial-grade range aligned with laptop/docking station thermal profiles |
Pinout & Package
MAX3814CHJ+T is housed in a 5mm × 5mm × 1.0mm, 32-pin TQFP package (package code H32+1), RoHS-compliant, with exposed paddle for thermal performance. Pin 1 is top-left corner (marked dot), and pins are numbered counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 17, 24 | N.C. | No internal connection - must be left floating or tied to ground per layout best practice |
| 2, 3, 6, 7, 10, 11, 30, 31 | INx+/INx− | Differential CML inputs (4 channels); accept 700–1400mVP-P, terminated to VCC internally |
| 12 | ENABLE | LVTTL-active-low control - high disables all outputs, reducing supply current to standby level |
| 14, 15, 18, 19, 22, 23, 26, 27 | OUTx−/OUTx+ | Differential CML outputs (4 channels); open-collector, 10mA/15mA selectable via LEVEL pin |
| 29 | LEVEL | LVTTL control - low = 10mA drive (standard non-back-terminated), high = 15mA (for 200Ω back termination) |
| 4, 5, 9, 32 | VCC | 3.3V power supply - all four pins must be connected to clean 3.3V with local 0.1μF decoupling |
| 13, 16, 20, 21, 25, 28 | VEE | Ground reference - connect directly to solid ground plane; multiple pins reduce inductance |
Key Features
| Feature | Design Value |
|---|---|
| FR-4 and cable equalization | Compensates up to 15dB loss at 825MHz - restores signal integrity across long PCB traces and passive cables |
| Selectable output current | 10mA/15mA via LEVEL pin - enables optimal matching to either standard 100Ω differential load or 200Ω back termination |
| Low residual jitter | ≤0.2UIP-P at 1.65Gbps - preserves timing margin for HDMI 1.3 compliance and robust receiver lock |
| Flexible channel mapping | All 4 channels identical and swappable - supports arbitrary assignment of clock/data lanes for DVI vs. HDMI connector layouts |
| Robust input sensitivity | Operates with 700–1400mVP-P input swing - tolerates attenuated signals from long cables or internal routing losses |
| ESD protection | 2000V HBM on all I/Os; 5.5V absolute max signal rating - withstands handling and system-level transients |
Applications
| Laptop Docking Station | HDMI Cable Receiver |
|---|---|
|
Use Scenario: Signal redrive at the docking connector between laptop GPU and external display port. IC Role / Device Role / Timing Role: TMDS equalizer and driver - compensates FR-4 loss in dock PCB and absorbs reflections from DVI/HDMI connector discontinuities. Use Value: Enables stable 1080p/60Hz transmission over extended dock PCB routing while maintaining <0.2UIP-P jitter at receiver. |
Use Scenario: Signal restoration at the HDMI input of a TV or monitor after 15m of 26 AWG cable. IC Role / Device Role / Timing Role: Cable equalizer - mitigates skin-effect and dielectric losses in long passive HDMI cables. Use Value: Recovers eye opening degraded by >12dB channel loss at 825MHz, enabling plug-and-play compatibility with legacy sources. |
| Laptop Internal Display Interface | Port Expander Hub |
|
Use Scenario: Redriving TMDS signals from MXM GPU to internal eDP/LVDS bridge or internal display flex cable. IC Role / Device Role / Timing Role: Board-level equalizer/driver - compensates loss in high-density laptop PCB layers and isolates reflection from internal connectors. Use Value: Eliminates deterministic jitter growth from 40–60in FR-4 runs, ensuring pixel-perfect timing for high-resolution internal panels. |
Use Scenario: Signal conditioning in multi-port HDMI hub that splits one source to multiple displays. IC Role / Device Role / Timing Role: Fanout driver with equalization - maintains signal fidelity across parallel TMDS paths with varying trace lengths. Use Value: Delivers matched 1.05VP-P outputs and uniform jitter performance to all downstream ports, avoiding skew-induced sync errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TMDS equalizer/driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TI SN65DP159 | Retimers (not equalizers); requires embedded clock recovery; supports DP 1.2 and HDMI 2.0 via protocol conversion | Targets DisplayPort-to-HDMI active conversion, not passive FR-4/cable loss compensation | Choose when protocol translation or higher data rates (>2.25Gbps) are required; not drop-in for MAX3814CHJ+T's analog equalization role |
| Pericom PI3HDX1204A | Passive 1:4 fanout buffer; no equalization; fixed 100Ω output termination; no LEVEL/ENABLE control | Suitable only for short, low-loss interconnects (<15cm); cannot compensate channel loss or manage reflections | Choose only for simple signal splitting in compact systems where loss is negligible; lacks jitter suppression and back-termination capability |
Compared with SN65DP159 and PI3HDX1204A, the MAX3814CHJ+T uniquely combines analog adaptive equalization, selectable CML drive strength, and reflection-mitigating back-termination control - making it the only option among the three capable of restoring degraded TMDS eyes in lossy FR-4 and cable channels without clock recovery or protocol translation.
Availability
MAX3814CHJ+T is available at Aetrix Electronics and suitable for laptop docking stations, HDMI cable receivers, internal display interfaces, and port expander hubs requiring stable component supply with guaranteed commercial-temperature performance and RoHS-compliant packaging.
Supply support for MAX3814CHJ+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 high-speed interface ICs for demanding signal integrity, power, and timing applications.
The MAX3814CHJ+T belongs to Maxim's high-speed serial interface product line, engineered specifically to solve DVI/HDMI signal degradation in consumer and computing equipment with analog equalization and robust CML I/O architecture.
FAQ
What is the maximum supported data rate for MAX3814CHJ+T?
The MAX3814CHJ+T is specified for operation from 0.25Gbps to 1.65Gbps and has been characterized up to 2.25Gbps on Spectra Strip cable. At 1.65Gbps, it delivers ≤0.2UIP-P residual jitter with up to 15dB channel loss - meeting HDMI 1.3 requirements. Operation beyond 1.65Gbps is possible but not guaranteed across temperature and voltage extremes.
How does the LEVEL pin affect MAX3814CHJ+T output performance?
The LEVEL pin configures MAX3814CHJ+T's CML output current: low = 10mA (standard drive into 100Ω differential load), high = 15mA (optimized for 200Ω differential back termination). In both modes, differential output swing remains 1.05VP-P, but the 15mA mode improves return loss to ≥10dB at DVI/HDMI connectors by damping reflections.
Can MAX3814CHJ+T be used with DC-coupled TMDS links?
No - MAX3814CHJ+T is designed exclusively for AC-coupled TMDS links. Its CML inputs are terminated to VCC, and its open-collector outputs require external pull-up or back-termination networks. DC coupling violates the internal biasing scheme and may cause malfunction or damage; refer to Figure 12 in the datasheet for correct AC-coupled implementation.
What is the recommended placement for the 200Ω back-termination resistor with MAX3814CHJ+T?
The 200Ω differential back-termination resistor must be placed as close as physically possible to the MAX3814CHJ+T output pins (e.g., within 5mm), directly across OUTx+/OUTx− pairs. This minimizes stub inductance and ensures effective reflection absorption at the source - critical for achieving the specified ≥10dB return loss at HDMI/DVI connectors.
Does MAX3814CHJ+T support HDMI 2.0 or higher standards?
No - MAX3814CHJ+T is compliant with HDMI 1.3 and DVI 1.0 specifications. It does not support HDMI 2.0's 6Gbps data rate or TMDS clock doubling. For HDMI 2.0+, retimer-based solutions like TI SN65DP159 or Parade PS8409 are required. MAX3814CHJ+T remains optimal for legacy 1.65Gbps HDMI/DVI applications with analog loss compensation needs.
MAX3814CHJ+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-TQFP
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Cable Equalization
- Interface:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Supplier Device Package:
- 32-TQFP (5x5)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
MAX3814CHJ+T FAQ
1.How can I place an order for MAX3814CHJ+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3814CHJ+T 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 MAX3814CHJ+T reliable?
The price and inventory of MAX3814CHJ+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3814CHJ+T is usually 5 days.
3.What payment methods are accepted for MAX3814CHJ+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3814CHJ+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3814CHJ+T?
MAX3814CHJ+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3814CHJ+T 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 MAX3814CHJ+T?
For technical support, including MAX3814CHJ+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3814CHJ+T requirements.
6.How does Aetrix verify that MAX3814CHJ+T is sourced from the original manufacturer or authorized distributors?
All MAX3814CHJ+T 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 MAX3814CHJ+T meets industry standards.
7.What is the process for return or replacement of MAX3814CHJ+T?
All MAX3814CHJ+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX3814CHJ+T, 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 MAX3814CHJ+T part is unused and in its original packaging.
Return procedure for MAX3814CHJ+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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