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Analog Devices Inc./Maxim Integrated MAX14931FASE+T
- Part No.:
- MAX14931FASE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931FASE+T.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,497
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Product details
Overview
MAX14931FASE+T from Analog Devices is a 4-channel, unidirectional digital isolator with 2.75kVRMS galvanic isolation, 150Mbps maximum data rate, and independent 1.71V–5.5V dual-supply operation across isolated domains. It features default-low output configuration, 6.67ns minimum pulse width, and operates from –40°C to +125°C - enabling robust signal isolation in industrial fieldbus and battery management systems.
For engineers reviewing the MAX14931FASE+T datasheet, MAX14931FASE+T pinout, MAX14931FASE+T application, or MAX14931FASE+T equivalent, this page delivers verified specifications including CMTI ≥25kV/µs, propagation delay ≤7.5ns (typ), VIOWM = 443VRMS, and SOIC-16 wide-body package compatibility for high-reliability multichannel isolation designs.
Technical Context
The MAX14931FASE+T implements capacitive isolation with proprietary silicon-dioxide barrier technology, supporting unidirectional channel mapping (A→B only) and integrated enable control per side. Its architecture enables precise timing control via low-skew propagation (tSCSLH ≤0.9ns typ) and sub-1ns pulse-width distortion at 150Mbps.
It supports level translation between mismatched logic domains (e.g., 1.8V microcontroller to 3.3V FPGA I/O), with input thresholds referenced to respective VDD supplies and guaranteed operation up to +125°C ambient. Safety compliance includes UL1577 (3750VRMS), VDE 0884-11 Basic Insulation, and IEC 61000-4-5 ±10kV surge protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 2.75kVRMS withstand (60s), 443VRMS continuous working voltage - meets reinforced insulation requirements for industrial safety standards. |
| Max Data Rate | 150Mbps - supports high-speed SPI clocking and real-time sensor data isolation without protocol bottlenecks. |
| Propagation Delay | 5.1ns (tPLH typ at 5V) - enables tight timing budgets in time-critical control loops and high-frequency serial interfaces. |
| CMTI | ≥25kV/µs - ensures reliable operation in noisy motor drive or power converter environments with fast common-mode transients. |
| Supply Range | 1.71V to 5.5V per side - allows direct interfacing with legacy 5V, modern 3.3V/2.5V, and ultra-low-power 1.8V logic families. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and battery pack monitoring applications. |
| Output Default | Low - prevents floating states during power-up/power-down sequences in safety-critical systems. |
Pinout & Package
MAX14931FASE+T is housed in a 16-pin wide-body SOIC package (10.3mm × 7.5mm, creepage/clearance = 8mm), compliant with JEDEC MS-013AC. The package supports standard reflow profiles and provides enhanced thermal performance (θJA = 71°C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side digital inputs | Accept CMOS/LVTTL signals referenced to GNDA; support 0.7×VDDA high threshold for noise immunity. |
| OUTB1–OUTB4 | Secondary-side digital outputs | Drive loads up to 4mA with VOH ≥ VDDB–0.4V and VOL ≤ 0.4V - compatible with standard logic families. |
| VDDA / GNDA | Primary-side power domain | Isolated 1.71–5.5V supply pair; enables level-shifting from microcontroller to isolated peripherals. |
| VDDB / GNDB | Secondary-side power domain | Independent 1.71–5.5V supply pair; decouples noise between isolated subsystems. |
| ENA | Primary-side output enable | Active-high control for OUTAx outputs; used for power-gating or bus arbitration on side A. |
| ENB | Secondary-side output enable | Active-high control for OUTBx outputs; allows dynamic disabling of isolated outputs without reset. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive isolation barrier | SiO₂ dielectric with 2pF inter-side capacitance - minimizes coupling noise and enables high CMTI performance. |
| Low propagation skew | ≤0.9ns channel-to-channel skew (same direction) - preserves signal integrity in parallel data buses like isolated ADC interfaces. |
| Glitch rejection | 15ns minimum input pulse width rejection - suppresses EMI-induced false triggers in electrically harsh environments. |
| Undervoltage lockout | 1.45V–1.71V UVLO threshold with 50mV hysteresis - prevents metastable output states during brown-out conditions. |
| ESD protection | ±4kV HBM on all pins - eliminates need for external TVS diodes in most industrial PCB layouts. |
Applications
| Industrial Fieldbus Isolation | Isolated SPI Interface |
|---|---|
|
Use Scenario: Isolating RS-485 transceivers in PLC backplanes exposed to ground potential differences and EFT bursts. IC Role / Device Role / Timing Role: Unidirectional signal isolator bridging controller and bus PHY; handles 25Mbps differential signaling with <7.5ns propagation delay. Use Value: Prevents ground loop currents and ensures communication integrity under 25kV/µs transients per IEC 61000-4-4. |
Use Scenario: Isolating SPI clock, MOSI, MISO, and CS lines between MCU and isolated ADC in energy metering. IC Role / Device Role / Timing Role: Four independent unidirectional channels - three for MOSI/CS/SCLK (A→B), one for MISO (B→A) using complementary device. Use Value: Enables full-duplex SPI isolation at up to 150MHz SCLK while maintaining <1ns pulse-width distortion for accurate sampling. |
| Battery Management System (BMS) | Medical Sensor Isolation |
|
Use Scenario: Isolating cell voltage monitor ICs from host MCU in multi-cell EV battery packs operating up to 1000V DC bus. IC Role / Device Role / Timing Role: Level-translating isolator for analog front-end digital outputs (e.g., LTC6813 status bits) across 2.75kVRMS barrier. Use Value: Supports 443VRMS continuous working voltage and 630VPK repetitive peak rating - certified for MOOP in IEC 60601-1 ed.3 systems. |
Use Scenario: Isolating patient-connected ECG front-end digital outputs from hospital-grade data acquisition units. IC Role / Device Role / Timing Role: Galvanically isolating digital status and control signals while meeting 630VPK transient isolation and 443VRMS working voltage requirements. Use Value: Achieves basic insulation per VDE 0884-11 and IEC 60601-1 ed.3 - eliminates risk of leakage current exceeding 10µA patient limit. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8641ED-B-IS | 4-channel, 2.5kVRMS, 150Mbps, default-high output, QSOP-16 package (6mm × 5mm) | Lacks 8mm creepage; rated for 350VRMS working voltage - unsuitable for >400VRMS continuous industrial bus applications. | Select when board space is constrained and 350VRMS working voltage suffices; verify layout clearance for 4mm creepage. |
| ADUM140D0BRWZ | 4-channel, 3.75kVRMS, 150Mbps, default-low, SOIC-16 wide (10.3mm × 7.5mm), but only 100Mbps guaranteed over temperature | Higher isolation rating but lower guaranteed speed at +125°C - may require derating in high-temp industrial enclosures. | Prefer when >3.75kVRMS test margin is required; confirm 150Mbps operation via characterization at max ambient. |
Compared with SI8641ED-B-IS and ADUM140D0BRWZ, the MAX14931FASE+T uniquely combines 2.75kVRMS isolation, 150Mbps guaranteed speed at +125°C, 8mm creepage, and default-low outputs in a production-qualified wide-SOIC package - making it optimal for space-tolerant, high-reliability industrial and medical isolation where VIOWM ≥443VRMS is mandated.
Availability
MAX14931FASE+T is available at Aetrix Electronics and suitable for industrial fieldbus communications, isolated SPI interfaces, and battery management systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX14931FASE+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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX14930–MAX14932 family was designed specifically for high-reliability multichannel digital isolation in harsh environments - emphasizing safety certification, wide temperature operation, and interoperability with diverse logic voltage domains.
FAQ
What is the maximum guaranteed data rate for MAX14931FASE+T over its full temperature range?
The MAX14931FASE+T is guaranteed to operate at 150Mbps from –40°C to +125°C ambient, with typical propagation delay of 5.1ns (tPLH) and pulse-width distortion ≤1ns at 5V supplies. This specification is validated by design and confirmed in production testing per the datasheet's Dynamic Electrical Characteristics table for MAX1493_B/E variants.
Does MAX14931FASE+T support bidirectional communication on the same channel?
No, MAX14931FASE+T is a unidirectional isolator with fixed A→B channel direction (INAx → OUTBx). For bidirectional protocols like I²C, Analog Devices specifies the MAX14933 - a separate device in the same family with integrated bus arbitration logic and open-drain outputs.
What safety certifications apply to MAX14931FASE+T?
MAX14931FASE+T is certified to UL1577 (3750VRMS), cUL (CSA 5A), VDE 0884-11:2017 Basic Insulation (VIOTM = 4600VPK, VIORM = 630VPK), and TUV IEC 60601-1 ed.3 for medical applications. These approvals cover the full 16-pin wide SOIC package and are documented in file E351759 and ref. 5015017-4880-0001.
Can MAX14931FASE+T be used for level translation between 1.8V and 5V logic domains?
Yes, MAX14931FASE+T supports independent 1.71V–5.5V supplies on each side: VDDA can be 1.8V (microcontroller side) while VDDB is 5V (isolated peripheral side). Input thresholds scale with respective VDD, and outputs drive full rail-to-rail logic levels - enabling seamless level translation without external circuitry.
What is the creepage and clearance distance for the MAX14931FASE+T SOIC package?
The MAX14931FASE+T uses the wide-body SOIC package (outline 21-0042) with minimum creepage and clearance distances of 8mm - exceeding IEC 60664-1 requirements for 443VRMS working voltage and qualifying for reinforced insulation in industrial equipment.
MAX14931FASE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2750Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 150Mbps
- Propagation Delay tpLH / tpHL (Max):
- 7.5ns, 7.4ns
- Pulse Width Distortion (Max):
- 1ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX14931FASE+T FAQ
1.How can I place an order for MAX14931FASE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931FASE+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 MAX14931FASE+T reliable?
The price and inventory of MAX14931FASE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931FASE+T is usually 5 days.
3.What payment methods are accepted for MAX14931FASE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931FASE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931FASE+T?
MAX14931FASE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931FASE+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 MAX14931FASE+T?
For technical support, including MAX14931FASE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931FASE+T requirements.
6.How does Aetrix verify that MAX14931FASE+T is sourced from the original manufacturer or authorized distributors?
All MAX14931FASE+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 MAX14931FASE+T meets industry standards.
7.What is the process for return or replacement of MAX14931FASE+T?
All MAX14931FASE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931FASE+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 MAX14931FASE+T part is unused and in its original packaging.
Return procedure for MAX14931FASE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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