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Analog Devices Inc./Maxim Integrated MAX9420EGJ
- Part No.:
- MAX9420EGJ
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Translators, Level Shifters
- Package:
- Datasheet:
-
MAX9420EGJ.pdf
- Description:
- LOGIC LEVEL TRANSLATOR
- Quantity:
- Payment:
- Shipping:
Inventory:593
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Product details
Overview
MAX9420EGJ from Maxim Integrated is a quad differential LVECL-to-LVPECL translator in a 32-lead 5mm × 5mm QFN package, operating from -40°C to +85°C. It delivers 336ps typical propagation delay, 17ps typical channel-to-channel skew, and supports up to 2GHz data rate in asynchronous mode. Designed for high-speed clock distribution in telecom backplanes and base stations, it features open inputs and open-emitter outputs requiring external termination.
For engineers reviewing the MAX9420EGJ datasheet, MAX9420EGJ pinout, MAX9420EGJ application, or MAX9420EGJ equivalent, this page provides verified electrical parameters, thermal performance data, synchronous/asynchronous mode behavior, output termination requirements, and validated alternative options for LVECL-to-LVPECL translation in space-constrained, high-frequency designs.
Technical Context
The MAX9420EGJ implements four independent differential translators with dual-mode operation: asynchronous (SEL = high) enables direct input-to-output translation with 336ps delay, while synchronous (SEL = low) latches all channels on the rising edge of CLK with 506ps typical CLK-to-OUT delay. Its bipolar process delivers stable timing across temperature with 0.2–1ps/°C propagation delay coefficient.
It operates with split supplies: VEE = -2.0V to -3.6V for LVECL-compatible inputs and VCC = 2.375V to 3.6V for LVPECL outputs, with differential output swing of 600–660mV and common-mode voltage referenced to VCC − 1.5V to VCC − 1.1V. The exposed paddle (EP) is internally connected to VEE for thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 336ps typical (IN-to-OUT, asynchronous mode); enables sub-3GHz signal routing with minimal latency impact. |
| Channel Skew | 17ps typical; ensures <100ps total skew across all four channels for tight-tolerance clock fanout. |
| Supply Range | VEE = -2.0V to -3.6V, VCC = 2.375V to 3.6V; supports standard LVECL input levels and LVPECL output compliance. |
| Differential Output Swing | 600–660mV; meets LVPECL logic threshold requirements with margin at 3.3V VCC. |
| Max Data Frequency | 2GHz (asynchronous), 1.5GHz (synchronous); validated for DSLAM and base station backplane signaling. |
| Junction Thermal Resistance | 47°C/W (QFN package); allows 1.7W max power dissipation at TA = +70°C with 21.3mW/°C derating. |
| Input Configuration | Open inputs; requires external biasing or termination per Figure 5 to prevent noise-induced toggling. |
| Output Configuration | Open-emitter outputs; mandates external 50Ω termination to VCC − 2.0V or Thevenin equivalent for proper LVPECL level generation. |
Pinout & Package
MAX9420EGJ uses a 32-lead 5mm × 5mm QFN package with exposed paddle (EP) internally connected to VEE. The package supports high thermal conductivity (θJA = 47°C/W) and low inductance grounding via multiple GND pins and EP connection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 24 | VEE | Negative supply rail; must be bypassed with 0.1µF + 0.01µF ceramics close to each pin; EP connects internally to VEE. |
| 2, 3 | SEL / SEL | Differential select input; high differential state enables asynchronous mode, low differential state enables synchronous clocked operation. |
| 4, 5 | CLK / CLK | Differential clock input; active only in synchronous mode; rising edge clocks all four channels simultaneously. |
| 6, 7 | EN / EN | Differential enable input; high differential state enables outputs, low differential state forces all outputs to differential low. |
| 9–10, 15–16, 25–26, 31–32 | IN0–IN3 differential pairs | Open-input LVECL-compatible terminals; require external biasing (e.g., 1kΩ to VEE) if unused to prevent noise coupling. |
| 12–13, 18–19, 22–23, 28–29 | OUT0–OUT3 differential pairs | Open-emitter LVPECL outputs; require external 50Ω termination to VCC − 2.0V for correct common-mode and swing. |
| 11, 17, 20, 21, 27, 30 | VCC | Positive supply rail; six dedicated pins reduce IR drop and improve PSRR; bypass individually with 0.1µF + 0.01µF ceramics. |
| 14, 20, 21, 27 | GND | Ground reference; four dedicated pins plus EP connection minimize ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low skew translation | 17ps typical channel-to-channel skew enables precise multi-channel clock alignment in telecom backplanes. |
| Dual-mode operation | Selectable synchronous (clocked) or asynchronous (transparent) behavior via single differential SEL pair-no external logic required. |
| Open-emitter LVPECL outputs | Supports flexible termination schemes including Thevenin and AC-coupled configurations while maintaining signal integrity up to 2GHz. |
| Integrated VEE-connected EP | Exposed paddle reduces thermal resistance to 47°C/W and improves power handling without external heatsinking. |
| LVECL-compatible open inputs | Eliminates need for internal input termination resistors, reducing die area and enabling custom biasing for noise-sensitive applications. |
Applications
| Central Office Backplane Clock Distribution | DSLAM Backplane |
|---|---|
Use Scenario: Distributing low-skew 1.25GHz clock signals across 16-slot telecom shelf with <50ps inter-slot jitter accumulation. IC Role / Device Role / Timing Role: Quad LVECL-to-LVPECL translator providing four independent, matched-delay clock paths with deterministic skew control. Use Value: 17ps typical channel skew and 336ps propagation delay ensure sub-100ps total path variation across all slots, meeting SONET OC-48 timing budgets. | Use Scenario: Driving line-card timing references in carrier-class DSL access multiplexers with >2000 simultaneous ADSL2+ lines. IC Role / Device Role / Timing Role: High-speed signal translator converting LVECL backplane clocks to LVPECL levels for FPGA and PHY interface synchronization. Use Value: 2GHz max data rate and 600–660mV differential output swing guarantee robust LVPECL logic margins under full-load thermal conditions. |
| Base Station RF Subsystem | ATE High-Speed Digital Test |
Use Scenario: Synchronizing multiple RF transceiver ICs in 4G/LTE macro base stations using shared 30.72MHz and 122.88MHz reference clocks. IC Role / Device Role / Timing Role: Low-jitter clock buffer translating LVECL system clocks to LVPECL for ADC/DAC sampling clock distribution. Use Value: Added random jitter ≤1.0ps(RMS) at 2GHz and deterministic jitter ≤45ps(P-P) preserve EVM performance in wideband RF signal chains. | Use Scenario: Generating precisely timed stimulus patterns for 1.5Gbps DDR3 memory test vectors in automated test equipment. IC Role / Device Role / Timing Role: Asynchronous mode translator converting LVECL pattern generator outputs to LVPECL levels for DUT interface. Use Value: 336ps propagation delay and <100ps total skew across four channels enable sub-nanosecond timing correlation between parallel test channels. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LVECL-to-LVPECL translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX9422EGJ | Integrated 100Ω differential input termination; same open-emitter outputs and QFN-32 package. | Reduces external component count for input biasing; preferred when LVECL source impedance matches 100Ω differential. | Select MAX9422EGJ when input termination simplification outweighs minor cost increase and board layout flexibility is constrained. |
| MC100EP139DG | Single-channel ECL-to-PECL translator in SOIC-8; 300ps propagation delay, 10ps skew; requires four units for quad function. | Higher PCB area, discrete routing, and supply decoupling complexity; lacks integrated SEL/CLK control for synchronous mode. | Choose MC100EP139DG only when legacy SOIC footprint compatibility or single-channel modularity is mandatory. |
Compared with MAX9420EGJ, MAX9422EGJ offers integrated input termination at identical performance and package, while MC100EP139DG provides lower per-channel delay but incurs significant layout, power, and control overhead for quad-channel implementation.
Availability
MAX9420EGJ is available at Aetrix Electronics and suitable for central office clock distribution, DSLAM backplane design, and base station RF subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX9420EGJ 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 precision timing solutions.
The MAX9420–MAX9423 family was designed specifically for ultra-low-skew, high-frequency clock and data translation in telecom infrastructure, targeting applications where sub-100ps timing integrity and multi-gigahertz bandwidth are non-negotiable.
FAQ
What is the maximum operating frequency of the MAX9420EGJ in asynchronous mode?
The MAX9420EGJ supports up to 2GHz maximum data frequency in asynchronous mode (SEL = high), verified with ≥400mV differential output swing. This rating is measured under specified conditions: VEE = -3.3V, VCC = 3.3V, input transition time = 125ps (20% to 80%), and VIHD − VILD = 0.2V. Performance remains stable across the full -40°C to +85°C operating range.
Does the MAX9420EGJ require external termination resistors on its inputs?
Yes, the MAX9420EGJ has open inputs and requires external termination. Unused inputs must be biased-typically with a 1kΩ resistor to VEE-as shown in Figure 5 of the datasheet. Active inputs also require appropriate LVECL-compatible termination to maintain signal integrity and prevent reflections, especially above 500MHz.
How is the exposed paddle (EP) of the MAX9420EGJ connected internally?
The exposed paddle (EP) of the MAX9420EGJ is internally connected to VEE. This connection is fixed and not user-configurable. It serves as a low-inductance thermal and electrical path to the negative supply, improving thermal dissipation (θJA = 47°C/W) and reducing ground bounce during high-speed switching events.
Can the MAX9420EGJ operate with VCC = 2.5V and VEE = -3.3V?
Yes, the MAX9420EGJ supports VCC = 2.375V to 3.6V and VEE = -2.0V to -3.6V independently. Operation at VCC = 2.5V and VEE = -3.3V is within specification and commonly used to interface with 2.5V LVPECL receivers while maintaining full LVECL input compatibility. Output swing scales proportionally with VCC.
What happens to the outputs of the MAX9420EGJ when EN/EN is set to differential low?
When EN/EN is set to differential low (EN = low, EN = high), the MAX9420EGJ forces all four differential outputs (OUT0–OUT3) into a defined differential low state, regardless of input or clock activity. This feature enables clean output muting during power sequencing or fault conditions without affecting upstream signal sources.
MAX9420EGJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- Packaging:
- Bulk
- Product Status:
- Active
- Translator Type:
- Mixed Signal
- Channel Type:
- Unidirectional
- Number of Circuits:
- 1
- Channels per Circuit:
- 4
- Voltage - VCCA:
- -
- Voltage - VCCB:
- -
- Input Signal:
- LVECL
- Output Signal:
- LVPECL
- Output Type:
- Non-Inverted
- Data Rate:
- 3GHz
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Features:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VFQFN Exposed Pad
MAX9420EGJ FAQ
1.How can I place an order for MAX9420EGJ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX9420EGJ 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 MAX9420EGJ reliable?
The price and inventory of MAX9420EGJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX9420EGJ is usually 5 days.
3.What payment methods are accepted for MAX9420EGJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX9420EGJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX9420EGJ?
MAX9420EGJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX9420EGJ 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 MAX9420EGJ?
For technical support, including MAX9420EGJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX9420EGJ requirements.
6.How does Aetrix verify that MAX9420EGJ is sourced from the original manufacturer or authorized distributors?
All MAX9420EGJ 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 MAX9420EGJ meets industry standards.
7.What is the process for return or replacement of MAX9420EGJ?
All MAX9420EGJ units undergo pre-shipment inspection (PSI). If there is an issue with MAX9420EGJ, 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 MAX9420EGJ part is unused and in its original packaging.
Return procedure for MAX9420EGJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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