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Analog Devices Inc./Maxim Integrated MAX3814CHJ+
- Part No.:
- MAX3814CHJ+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Specialized
- Package:
- 32-TQFP
- Datasheet:
-
MAX3814CHJ+.pdf
- Description:
- IC INTERFACE SPECIALIZED 32TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,996
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Product details
Overview
MAX3814CHJ+ from Maxim Integrated is a 4-channel DVI/HDMI TMDS equalizer and driver IC designed to compensate for high-frequency FR-4 board trace and cable losses up to 15dB at 825MHz, support data rates from 0.25Gbps to 1.65Gbps, deliver ≤0.2UIP-P residual jitter, and provide selectable 10mA/15mA CML output drive for reflection mitigation in laptop docking stations and HDMI cable receivers.
For engineers reviewing the MAX3814CHJ+ datasheet, MAX3814CHJ+ pinout, MAX3814CHJ+ application, or MAX3814CHJ+ equivalent, this page delivers verified electrical parameters, channel-flexible pin assignment, LEVEL/ENABLE control behavior, real-world jitter performance under loss conditions, and layout-critical termination guidance for DVI/HDMI signal integrity design.
Technical Context
The MAX3814CHJ+ integrates four independent CML input buffers, fixed-gain equalizers, limiting amplifiers, and open-collector CML output drivers - all operating from a single 3.3V supply. Each channel processes differential TMDS signals with 50Ω on-chip input termination to VCC and supports arbitrary clock/data channel mapping to accommodate DVI and HDMI connector layouts.
Its dual-output-current architecture (10mA low-level / 15mA high-level via LEVEL pin) enables either standard non-back-terminated operation or 200Ω differential back termination for ≥10dB return loss - directly addressing reflection-induced eye closure at DVI/HDMI connectors without increasing common-mode offset.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate Range | 0.25Gbps to 1.65Gbps - supports all HDMI 1.3 pixel clocks including 1080p60 and UXGA timing. |
| Equalization Capability | Up to 15dB loss compensation at 825MHz - restores signal integrity across 80-inch FR-4 traces or 30ft 28AWG cable. |
| Residual Jitter | ≤0.2UIP-P at 1.65Gbps with 0–15dB channel loss - ensures robust eye opening for HDMI receiver compliance. |
| Differential Output Swing | 1050mVP-P (typical) with 50Ω load - meets DVI/HDMI TMDS voltage swing specification (800–1200mVP-P). |
| Supply Voltage | 3.0V to 3.6V - compatible with standard 3.3V DVI/HDMI system rails and tolerant of ±10% regulation. |
| Input Termination | 50Ω ±10% to VCC per side - eliminates need for external input resistors and maintains DC-coupled compatibility. |
| Operating Temperature | 0°C to +70°C - validated for commercial laptop, docking station, and display interface environments. |
Pinout & Package
MAX3814CHJ+ is housed in a 32-pin TQFP package (5mm × 5mm × 1.0mm profile), RoHS-compliant, with exposed thermal pad (VEE-connected). Pin 1 is located at top-left corner per JEDEC MO-220 standard; pins are arranged in clockwise order with VCC and VEE distributed across multiple locations for low-impedance power delivery.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INB+/INB−, INC+/INC−, IND+/IND−, INA+/INA− (Pins 2–3, 6–7, 10–11, 30–31) | Differential CML TMDS Inputs | Accept 700–1400mVP-P input swing; internally terminated to VCC with 50Ω per side - no external biasing required. |
| OUTB+/OUTB−, OUTC+/OUTC−, OUTD+/OUTD−, OUTA+/OUTA− (Pins 14–15, 18–19, 22–23, 26–27) | Differential CML TMDS Outputs | Open-collector outputs; current set to 10mA (LEVEL = low) or 15mA (LEVEL = high); require external 50Ω pull-up or 200Ω back termination. |
| LEVEL (Pin 29) | LVTTL Output Current Control | Drives 10mA output for standard DVI/HDMI non-back-terminated links; 15mA for 200Ω differential back termination to suppress reflections. |
| ENABLE (Pin 12) | Active-Low LVTTL Enable | High disables all outputs (reduces supply current to standby level); low enables full CML driver operation - supports dynamic power gating. |
| VCC (Pins 4, 5, 9, 32) | 3.3V Power Supply | All four pins must be connected to clean 3.3V rail with local 0.1μF decoupling; shared across all channels for noise immunity. |
| VEE (Pins 13, 16, 20, 21, 25, 28) | Ground Reference | Multiple ground pins minimize return-path inductance; must connect to solid low-impedance ground plane beneath IC footprint. |
Key Features
| Feature | Design Value |
|---|---|
| Arbitrary Channel Mapping | Any of the four differential pairs can serve as clock or data channel - eliminates rigid PCB routing constraints between DVI (clock-first) and HDMI (data-first) connectors. |
| Reflection-Mitigating Back Termination | LEVEL pin selects 15mA drive to enable 200Ω differential back termination resistor placement near IC - achieves ≥10dB return loss at connector discontinuities. |
| HDMI 1.3 Compliance Support | Validated up to 1.65Gbps with ≤0.2UIP-P residual jitter after 15dB loss - meets HDMI 1.3 electrical compliance margin for source-side equalization. |
| Robust Input Sensitivity | Operates with 700–1400mVP-P differential input swing - accommodates degraded signals from long cables or lossy FR-4 without external amplification. |
| Low-Power Enable Control | ENABLE pin reduces supply current to standby level when high - enables dynamic power management in portable docking systems. |
Applications
| Laptop PC TMDS Equalizer and Driver | Docking Station TMDS Equalizer and Driver |
|---|---|
Use Scenario: Signal path from laptop GPU to external display via internal flex or short PCB trace, encountering impedance mismatches at MXM or docking connectors. IC Role / Device Role / Timing Role: Equalizes FR-4 loss and redrives TMDS outputs at docking connector (location XX in Figure 6b), acting as a reflection-absorbing repeater stage. Use Value: Restores eye diagram integrity after 80-inch FR-4 trace loss; 200Ω back termination at MAX3814CHJ+ output suppresses connector reflections that would otherwise cause deterministic jitter >70ps. |
Use Scenario: Docking station aggregating multiple video sources and driving HDMI/DVI outputs through longer internal routing and external cables. IC Role / Device Role / Timing Role: Functions as channel-isolating redriver at port expander location YY, equalizing interconnect loss and enabling flexible channel assignment for mixed DVI/HDMI outputs. Use Value: Enables use of cost-effective 2-layer PCBs by compensating for trace loss; LEVEL-controlled 15mA drive allows 200Ω back termination to maintain 10dB return loss despite connector parasitics. |
| Cable TMDS Equalizer | HDTV Source Extender Box |
Use Scenario: HDMI cable receiver end (location ZZ), where cable attenuation degrades signal before reaching display ASIC input. IC Role / Device Role / Timing Role: Compensates for skin-effect and dielectric loss in 28AWG twin-axial cable up to 12 meters - restoring signal amplitude and jitter margin at display-side TMDS input. Use Value: Supports 1080p60 over 15m 26AWG or 12m 28AWG cable; input sensitivity down to 700mVP-P allows operation even after attenuator pads used for reflection suppression. |
Use Scenario: Consumer electronics extender box converting short-reach DVI-D to long-haul HDMI, requiring signal regeneration and protocol-transparent redriving. IC Role / Device Role / Timing Role: Serves as transparent TMDS redriver in DVI-D/HDMI extender (Figure 11), preserving HDCP signaling while boosting signal fidelity over extended cable runs. Use Value: Maintains HDMI 1.3 compliance without modifying TMDS encoding; 3.3V-only supply simplifies power design versus dual-rail alternatives. |
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 | Supports higher data rate (up to 5.4Gbps for DisplayPort 1.2); requires 1.8V/3.3V dual supply; integrated DP/HDMI protocol detection. | Targeted at DisplayPort-to-HDMI active adapters; not optimized for pure DVI legacy systems or FR-4 loss compensation below 2Gbps. | Select SN65DP159 only when DisplayPort input support or >2Gbps bandwidth is required; MAX3814CHJ+ remains optimal for cost-sensitive DVI/HDMI-only designs. |
| Pericom PI3HDX1204A | 4-channel HDMI redriver with auto-sensing equalization; operates from 3.3V; offers programmable EQ gain via I²C; no LEVEL pin for back-termination control. | Focused on HDMI 1.4a/2.0 systems with embedded DDC channel handling; lacks dedicated reflection-suppression back-termination mode. | Choose PI3HDX1204A for HDMI 2.0 designs needing adaptive EQ and DDC pass-through; MAX3814CHJ+ is preferred where deterministic 200Ω back termination is critical for legacy DVI stability. |
Compared with SN65DP159 and PI3HDX1204A, the MAX3814CHJ+ provides simpler, lower-power, single-supply operation with hardware-controlled back termination - making it uniquely suited for commercial laptop docking and cable-equalization applications where HDMI 1.3 compliance and reflection mitigation are primary requirements.
Availability
MAX3814CHJ+ is available at Aetrix Electronics and suitable for laptop display interfaces, docking station signal conditioning, and HDMI cable receiver designs requiring stable component supply, guaranteed RoHS compliance, and long-term industrial availability.
Supply support for MAX3814CHJ+ 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 solutions for industrial, communications, and consumer applications.
The MAX3814CHJ+ belongs to Maxim's high-speed interface product line, engineered specifically for DVI/HDMI TMDS signal integrity restoration in space-constrained, thermally sensitive video interface systems.
FAQ
What is the maximum supported data rate for the MAX3814CHJ+?
The MAX3814CHJ+ supports data rates from 0.25Gbps to 1.65Gbps, fully covering HDMI 1.3 specifications including 1080p60 timing. Performance is characterized and guaranteed at 1.65Gbps with ≤0.2UIP-P residual jitter after 15dB channel loss at 825MHz - confirming reliable operation at the upper limit of its rated range.
How does the LEVEL pin affect the output drive strength of the MAX3814CHJ+?
The LEVEL pin on the MAX3814CHJ+ selects between two CML output current modes: logic-low sets 10mA drive for standard non-back-terminated DVI/HDMI links, while logic-high enables 15mA drive to support a 200Ω differential back termination resistor - reducing reflections and achieving ≥10dB return loss at connector interfaces.
Can the MAX3814CHJ+ be used with both DVI and HDMI connectors despite their different pinouts?
Yes - the MAX3814CHJ+ supports arbitrary assignment of its four differential channels to clock or data functions. This flexibility allows identical PCB layout to serve both DVI (clock on pins 1–3) and HDMI (data on pins 1–3) connectors without redesign, as confirmed in the functional diagram and layout guidelines.
What is the purpose of the ENABLE pin on the MAX3814CHJ+?
The ENABLE pin on the MAX3814CHJ+ is an active-low LVTTL control that disables all CML output drivers when driven high, reducing supply current to standby level. When pulled low, it enables full operation - providing dynamic power gating capability useful in battery-powered docking stations and portable video interfaces.
Does the MAX3814CHJ+ require external input termination resistors?
No - the MAX3814CHJ+ integrates 50Ω input termination resistors to VCC on each side of every differential input pair (e.g., INB+, INB−). This eliminates the need for external resistors, simplifies layout, and ensures proper DC-coupled termination matching HDMI/DVI source output impedance.
MAX3814CHJ+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 32-TQFP
- Packaging:
- Tray
- 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+ FAQ
1.How can I place an order for MAX3814CHJ+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX3814CHJ+ 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+ reliable?
The price and inventory of MAX3814CHJ+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX3814CHJ+ is usually 5 days.
3.What payment methods are accepted for MAX3814CHJ+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX3814CHJ+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX3814CHJ+?
MAX3814CHJ+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX3814CHJ+ 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+?
For technical support, including MAX3814CHJ+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX3814CHJ+ requirements.
6.How does Aetrix verify that MAX3814CHJ+ is sourced from the original manufacturer or authorized distributors?
All MAX3814CHJ+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX3814CHJ+?
All MAX3814CHJ+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX3814CHJ+, 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+ part is unused and in its original packaging.
Return procedure for MAX3814CHJ+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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