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Analog Devices Inc./Maxim Integrated MAX9247ETM+
- Part No.:
- MAX9247ETM+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Serializers, Deserializers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
MAX9247ETM+.pdf
- Description:
- IC SERIALIZER LVDS 48-TQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,432
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Product details
Overview
The MAX9247ETM+ from Maxim Integrated is a 27-bit, DC-balanced LVDS serializer that converts 18-bit RGB video and 9-bit control data into a single high-speed serial stream for automotive display links. It operates at 2.5MHz–42MHz parallel clock frequencies, delivers up to 840Mbps serial data rate, features integrated 100Ω LVDS termination, preemphasis for signal integrity, and supports AC-coupled operation over shielded twisted-pair cable up to 10m in navigation displays.
For engineers reviewing the MAX9247ETM+ datasheet, MAX9247ETM+ pinout, MAX9247ETM+ application, or MAX9247ETM+ equivalent, this page provides verified technical context, real-world timing constraints, ESD robustness (±10kV ISO 10605 contact), differential output specifications, and validated alternatives for in-vehicle video interface design.
Technical Context
The MAX9247ETM+ implements proprietary DC-balanced encoding with two overhead bits for video (20-bit words) and one for control (19-bit + EN0), enabling EMI reduction and AC-coupling isolation. Its PLL locks to PCLK_IN with 17,100-cycle lock time and tolerates ±2% reference clock variation.
It uses dual supply domains: VCCIN (1.71V–3.6V) for LVTTL/LVCMOS inputs and +3.3V core (VCC/VCCPLL/VCCLVDS) for internal logic, PLL, and LVDS driver. Frequency range selection (RNG[1:0]) configures serial data rates from 50Mbps to 840Mbps across four discrete bands.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Parallel Clock Range | 2.5MHz to 42MHz - sets serial data rate from 50Mbps to 840Mbps via RNG[1:0] configuration |
| Differential Output Voltage (VOD) | 250–450mV - ensures reliable LVDS signaling into 100Ω loads with ≥250mV noise margin |
| Peak-to-Peak Output Jitter | 150ps - meets timing budget for <10⁻¹² BER over 2m CAT5 at 42MHz |
| ESD Protection (ISO 10605) | ±10kV contact / ±30kV air - enables robust handling in automotive assembly and field service |
| Operating Temperature | -40°C to +105°C - qualified for under-hood and display module environments per AEC-Q100 stress profiles |
| Supply Current (42MHz) | 70mA typical - determines thermal design and power rail sizing for LQFP PCB layout |
| Serializer Delay | 3.10×tT + 2.0ns to 3.10×tT + 8.0ns - defines fixed latency between PCLK_IN edge and OUT+ transition |
Pinout & Package
The MAX9247ETM+ is housed in a 48-lead LQFP package (7mm × 7mm, 0.5mm pitch) with exposed pad for thermal dissipation. Power domains are isolated: GND (pins 1,13,37), VCC (14,38), VCCIN (2), VCCPLL (27), VCCLVDS (34), PLLGND (26), LVDSGND (30,31).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RGB_IN[17:0] (pins 3–10, 39–48) | Video Data Inputs | 18-bit LVTTL/LVCMOS latched on PCLK_IN rising edge when DE_IN = high; internally pulled down |
| CNTL_IN[8:0] (pins 11,12,15–21) | Control Data Inputs | 9-bit LVTTL/LVCMOS latched on PCLK_IN rising edge when DE_IN = low; C0–C4 are single-bit-error tolerant |
| DE_IN (pin 22) | Data Enable | Switches input latch source between RGB_IN and CNTL_IN; must toggle for proper operation |
| PCLK_IN (pin 23) | Parallel Clock Input | Provides timing reference for input latching and PLL synchronization; internally pulled down |
| OUT+ / OUT- (pins 33,32) | LVDS Serial Outputs | Differential current-mode outputs with integrated 100Ω termination; support AC-coupling via CMF |
| CMF (pin 29) | Common-Mode Filter | Connects optional capacitor to LVDSGND to shunt common-mode switching noise and reduce EMI |
| RNG[1:0] (pins 35,36) | Frequency Range Select | Configures PLL bandwidth and serial data rate per Table 3 (e.g., RNG=11 → 20–42MHz / 400–840Mbps) |
| PRE (pin 25) | Preemphasis Enable | Drives high to boost output transition amplitude by 40–50%, improving eye opening on lossy STP cables |
Key Features
| Feature | Design Value |
|---|---|
| DC-balanced encoding | Enables AC-coupling isolation between serializer and deserializer, blocking ground shifts and low-frequency noise |
| Programmable phase-shifted LVDS signaling | Reduces spectral EMI peaks by spreading energy across harmonics without degrading timing margins |
| Five single-bit-error-tolerant control inputs (C0–C4) | Ensures robust recovery of critical sync signals (e.g., HSYNC/VSYNC) even with bit errors on STP cable |
| Integrated 100Ω LVDS termination | Eliminates external resistors, reduces BOM count, and damps reflections on controlled-impedance PCB traces |
| Separate VCCIN supply (1.71V–3.6V) | Allows direct interfacing to 1.8V, 2.5V, or 3.3V logic without level shifters in mixed-voltage systems |
Applications
| Navigation System Displays | In-Vehicle Entertainment Systems |
|---|---|
Use Scenario: High-resolution TFT LCD display driven from infotainment head unit over 2–5m shielded cable. IC Role / Device Role / Timing Role: Serializer converting parallel RGB+DE+HSYNC/VSYNC into robust LVDS stream for EMI-sensitive cabin environment. Use Value: DC balance allows AC-coupling to break ground loops; ±10kV ESD rating withstands service technician handling. |
Use Scenario: Rear-seat monitor receiving video from media processor with minimal board space. IC Role / Device Role / Timing Role: Low-latency parallel-to-serial bridge supporting 42MHz pixel clocks and embedded control channel. Use Value: Preemphasis maintains >200mV eye height over 5m STP; 105°C rating supports dashboard mounting near HVAC ducts. |
| Video Cameras | Automotive LCD Instrument Clusters |
Use Scenario: Front-facing ADAS camera sending raw video to domain controller via compact harness. IC Role / Device Role / Timing Role: Serializer embedding camera control (exposure, gain) alongside video using dedicated CNTL_IN lines. Use Value: Single-bit-error tolerance on C0–C4 ensures reliable transmission of critical camera settings over noisy engine bay wiring. |
Use Scenario: Digital gauge cluster with animated graphics requiring stable 35MHz+ pixel clock timing. IC Role / Device Role / Timing Role: Timing-critical serializer delivering deterministic latency (<8ns jitter impact) for real-time rendering. Use Value: ±2% reference clock tolerance accommodates oscillator drift across temperature; 17,100-cycle PLL lock ensures fast startup after ignition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVDS serializer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9275GTJ+ | Higher speed (up to 1.5Gbps), 64-pin TQFN, supports 10-bit RGB + 4-bit control; no preemphasis | Better suited for 1080p60 or dual-display links; requires more PCB area and tighter layout control | Select MAX9275GTJ+ only when >840Mbps throughput or smaller footprint than LQFP is required |
| TI DS90UB925QSQX/NOPB | FPD-Link III compliant, 1.5Gbps, integrated spread-spectrum clocking, different encoding scheme | Designed for TI ecosystem compatibility; not drop-in with MAX9247 pinout or timing behavior | Choose DS90UB925QSQX/NOPB when migrating to FPD-Link III standard or leveraging TI's deserializer pairing |
Compared with MAX9247ETM+, MAX9275GTJ+ offers higher bandwidth but lacks preemphasis and requires redesign; DS90UB925QSQX/NOPB provides FPD-Link III compliance but mandates full system revalidation due to protocol and timing differences.
Availability
The MAX9247ETM+ is available at Aetrix Electronics and suitable for automotive display interfaces, in-vehicle entertainment systems, and ADAS camera modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX9247ETM+ 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 markets.
The MAX9247ETM+ belongs to Maxim's automotive-grade serializer family targeting high-reliability video transport in harsh environments, with emphasis on ESD robustness, wide temperature operation, and cable drive capability.
FAQ
What is the maximum cable length supported by the MAX9247ETM+ at 42MHz?
The MAX9247ETM+ supports up to 10m of shielded twisted-pair (STP) cable at 42MHz (840Mbps) with preemphasis enabled and BER < 10⁻¹², as confirmed by Figure toc04 in the datasheet. Performance beyond 10m requires signal integrity analysis including connector losses, termination accuracy, and CMF capacitor placement.
Does the MAX9247ETM+ require external termination resistors on the LVDS outputs?
No, the MAX9247ETM+ integrates a 100Ω differential termination resistor between OUT+ and OUT-. This eliminates the need for external resistors, simplifies layout, and ensures consistent impedance matching when driving 100Ω-controlled interconnects like STP cable or PCB traces.
How does the RNG[1:0] pin configuration affect MAX9247ETM+ operation?
RNG[1:0] selects one of four parallel clock frequency bands (2.5–5MHz, 5–10MHz, 10–20MHz, or 20–42MHz), which directly sets the PLL bandwidth and serial data rate. Incorrect RNG settings cause PLL unlock or excessive jitter; configuration must match the actual PCLK_IN frequency per Table 3.
Can the MAX9247ETM+ interface directly with 1.8V logic inputs?
Yes, the MAX9247ETM+ accepts 1.8V logic levels on all single-ended inputs (RGB_IN, CNTL_IN, DE_IN, etc.) when VCCIN is supplied at 1.71V–1.98V. The VIH threshold is 0.65×VCCIN, ensuring reliable recognition of 1.8V-high signals without level translation.
What is the purpose of the CMF pin on the MAX9247ETM+?
The CMF pin connects to an optional capacitor (typically 0.1µF) tied to LVDSGND, forming a low-pass filter that shunts high-frequency common-mode switching noise from the LVDS outputs. This reduces radiated EMI and improves signal integrity on long cables without affecting differential swing.
MAX9247ETM+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Serializer
- Data Rate:
- 756Mbps
- Input Type:
- Serial
- Output Type:
- LVDS
- Number of Inputs:
- 27
- Number of Outputs:
- 1
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TQFN (6x6)
MAX9247ETM+ FAQ
1.How can I place an order for MAX9247ETM+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9247ETM+ 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 MAX9247ETM+ reliable?
The price and inventory of MAX9247ETM+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9247ETM+ is usually 5 days.
3.What payment methods are accepted for MAX9247ETM+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9247ETM+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9247ETM+?
MAX9247ETM+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9247ETM+ 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 MAX9247ETM+?
For technical support, including MAX9247ETM+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9247ETM+ requirements.
6.How does Aetrix verify that MAX9247ETM+ is sourced from the original manufacturer or authorized distributors?
All MAX9247ETM+ 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 MAX9247ETM+ meets industry standards.
7.What is the process for return or replacement of MAX9247ETM+?
All MAX9247ETM+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9247ETM+, 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 MAX9247ETM+ part is unused and in its original packaging.
Return procedure for MAX9247ETM+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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