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Analog Devices Inc./Maxim Integrated MAX14935FAWE+
- Part No.:
- MAX14935FAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14935FAWE+.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,268
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Product details
Overview
The MAX14935FAWE+ from Maxim Integrated is a four-channel, 5kVRMS galvanically isolated digital isolator with unidirectional channel configuration (3A→B, 1B→A), 25Mbps data rate, and default-low output state. It operates across 1.71V–5.5V dual supplies on isolated sides, supports -40°C to +125°C ambient, and is used in industrial fieldbus interfaces requiring robust isolation and level translation.
For engineers reviewing the MAX14935FAWE+ datasheet, MAX14935FAWE+ pinout, MAX14935FAWE+ application, or MAX14935FAWE+ equivalent, key selection criteria include its 25Mbps speed, CMTI of 25kV/µs, 8mm creepage/clearance, VDE 0884-11 basic insulation certification, and SOIC-16W package compatibility with high-density PCB layouts.
Technical Context
The MAX14935FAWE+ implements capacitive isolation using Maxim's proprietary silicon-dioxide barrier technology, enabling signal transfer across 5kVRMS-rated insulation. Its architecture features independent enable controls (ENA/ENB), asymmetric channel directionality (three A-to-B channels and one B-to-A channel), and integrated undervoltage lockout (1.45V–1.71V threshold) on both sides.
It delivers precise timing performance: propagation delay of 20.9–37.4ns (voltage-dependent), pulse-width distortion ≤3.2ns, and channel-to-channel skew as low as 3ns. The device maintains full functionality at 125°C ambient and supports safe operation up to 150°C junction temperature with thermal derating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s (UL1577), 848VRMS working voltage (VDE 0884-11), 1200VP repetitive peak - enables safety-critical industrial and medical system compliance |
| Data Rate | 25Mbps - supports high-speed SPI, RS-485, and digital I/O isolation without timing bottlenecks |
| Supply Voltage Range | 1.71V to 5.5V per side - allows direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic domains |
| CMTI | 25kV/µs - ensures reliable operation in noisy motor drives and power converters with fast transients |
| Propagation Delay | 20.9ns (min) to 37.4ns (max) - guarantees deterministic timing for real-time control loops |
| Operating Temperature | -40°C to +125°C ambient - qualified for under-hood automotive, factory automation, and battery management systems |
| Package | 16-pin wide-body SOIC (10.3mm × 7.5mm, 8mm creepage/clearance) - meets IPC-7351B land pattern requirements for high-voltage isolation |
Pinout & Package
Package: 16-pin wide-body SOIC (W16M+8, outline 21-0042), RoHS-compliant, 8mm minimum creepage and clearance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | VDDA / VDDB | Independent power supplies for isolated sides - requires local 0.1µF ceramic bypassing; enables level translation between disparate logic families |
| 2, 8, 9, 15 | GNDA / GNDB | Separate ground references per side - prevents ground-loop noise coupling in multi-node systems |
| 3–5, 12 | INA1–INA3 / INB1 | Unidirectional logic inputs - INA1–INA3 drive OUTB1–OUTB3 (A→B); INB1 drives OUTA1 (B→A) |
| 6, 7, 13, 14 | OUTB1–OUTB3 / OUTA1 | Corresponding outputs - OUTB1–OUTB3 reflect INA1–INA3; OUTA1 reflects INB1; all default-low when input unpowered |
| 10, 11 | ENB / ENA | Active-high enable pins with internal 2µA pullup - allow dynamic channel gating to reduce power during idle periods |
Key Features
| Feature | Design Value |
|---|---|
| Galvanic Isolation Barrier | 5kVRMS rated SiO₂ capacitor-based isolation - eliminates ground loops and withstands ±10kV surge (IEC 61000-4-5) |
| Channel Configuration Flexibility | 3A→B + 1B→A unidirectional layout - matches asymmetric protocols like SPI (3 data + 1 clock) or custom I/O expansion |
| Low-Power High-Speed Operation | 10.3mA typical supply current at 25Mbps/3.3V - enables energy-efficient isolation in battery-powered edge nodes |
| Robust Transient Immunity | 25kV/µs common-mode transient immunity - maintains data integrity in variable-frequency drives and PLC backplanes |
| Wide-Voltage Level Translation | 1.71V–5.5V dual-supply support - bridges legacy 5V microcontrollers to modern 1.8V FPGAs without external level shifters |
Applications
| Industrial Fieldbus Interface | SPI Isolation for Sensor Hubs |
|---|---|
Use Scenario: Isolating Modbus RTU or Profibus DP signals between PLC CPU and remote I/O modules in harsh factory environments. IC Role / Device Role / Timing Role: Provides galvanic separation between controller-side logic and field-side 24V digital I/O, blocking ground potential differences and EMI. Use Value: Enables reliable communication at 25Mbps while meeting IEC 61000-4-5 surge immunity and VDE 0884-11 basic insulation requirements. | Use Scenario: Isolating high-speed SPI bus between MCU and isolated ADC/DAC sensor array in precision measurement equipment. IC Role / Device Role / Timing Role: Transfers clock, MOSI, MISO, and CS signals across isolation barrier with <3ns channel skew and sub-37ns propagation delay. Use Value: Preserves SPI timing margins at up to 25MHz SCLK, eliminating setup/hold violations in multi-sensor synchronized acquisition. |
| RS-485 Transceiver Isolation | Battery Management System (BMS) Monitoring |
Use Scenario: Isolating RS-485 transceiver control lines (DE/RE) and data lines (RO/DI) in distributed energy storage systems. IC Role / Device Role / Timing Role: Shields MCU GPIOs from high-voltage bus transients while maintaining full-duplex timing alignment for half-duplex RS-485 operation. Use Value: Achieves 25kV/µs CMTI and 8mm creepage - critical for passing IEC 61000-4-4/6 immunity tests in grid-tied inverters. | Use Scenario: Isolating cell voltage monitoring ICs from main BMS controller across 400V+ battery packs in EVs and ESS. IC Role / Device Role / Timing Role: Transfers analog front-end status bits and fault flags from isolated sensing domain to host MCU with fail-safe default-low outputs. Use Value: Supports -40°C to +125°C operation and 5kVRMS isolation - ensures functional safety compliance (IEC 61508 SIL-2) in high-temperature battery enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM140D0BRZ | 4-channel, 25Mbps, 3.75kVRMS isolation, 16-pin SOIC, default-high outputs | Lacks 5kVRMS rating and VDE 0884-11 certification; lower CMTI (15kV/µs) | Select when 3.75kVRMS suffices and default-high logic behavior aligns with system reset strategy |
| SI8641ED-B-IS | 4-channel, 25Mbps, 5kVRMS, 16-pin SOIC, 3A→B + 1B→A config, default-low outputs | Higher supply current (12.5mA @25Mbps/3.3V), no UL/cUL/VDE triple certification | Choose if footprint compatibility is critical and UL/VDE co-certification is not required for end-equipment approval |
Compared with ADUM140D0BRZ and SI8641ED-B-IS, the MAX14935FAWE+ uniquely combines VDE 0884-11 + UL1577 + cUL certifications, 25kV/µs CMTI, and guaranteed -40°C to +125°C operation - making it preferred for safety-certified industrial and medical designs where regulatory alignment and transient resilience are non-negotiable.
Availability
MAX14935FAWE+ is available at Aetrix Electronics and suitable for industrial fieldbus interfaces, SPI-isolated sensor hubs, RS-485 transceiver isolation, and battery management system monitoring requiring stable component supply and long-term lifecycle assurance.
Supply support for MAX14935FAWE+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX14934–MAX14936 family was engineered specifically for high-reliability multichannel isolation in harsh environments - emphasizing 5kVRMS safety ratings, extended temperature operation, and configurable channel directionality for fieldbus and digital I/O systems.
FAQ
What is the maximum data rate supported by the MAX14935FAWE+?
The MAX14935FAWE+ supports a maximum data rate of 25Mbps, verified across its full operating temperature range (-40°C to +125°C) and supply voltage range (1.71V to 5.5V). This is confirmed in the Dynamic Electrical Characteristics table for MAX1493_B/E devices, where DRMAX = 25Mbps is explicitly specified for the MAX14935 variant. The device maintains signal integrity at this rate with <3ns channel-to-channel skew and 25kV/µs CMTI.
Does the MAX14935FAWE+ support bidirectional communication?
No, the MAX14935FAWE+ implements a fixed unidirectional channel configuration: three channels from Side A to Side B (INA1→OUTB1, INA2→OUTB2, INA3→OUTB3) and one channel from Side B to Side A (INB1→OUTA1). It does not support true bidirectional channels like I²C; for such applications, Maxim specifies the MAX14937. The MAX14935FAWE+ pinout and functional diagram confirm this asymmetric layout.
What safety certifications does the MAX14935FAWE+ hold?
The MAX14935FAWE+ is certified to UL1577 (5000VRMS), cUL (CSA Bulletin 5A), and VDE 0884-11:2017-01 for basic insulation. It meets IEC 60950-1 and IEC 61010-1 working voltage limits (848VRMS), and passes IEC 61000-4-5 ±10kV surge testing. These certifications are documented in the Safety Regulatory Approvals section of the datasheet and apply directly to the MAX14935FAWE+ package variant.
What is the default output state of the MAX14935FAWE+ when inputs are unpowered?
The MAX14935FAWE+ has a default-low output configuration: when any input (e.g., INA1 or INB1) is unpowered or floating, its corresponding output (e.g., OUTB1 or OUTA1) transitions to a logic-low state. This behavior is defined in the General Description and confirmed by the "default low" suffix in the ordering guide - distinguishing it from the MAX14935AAWE+ (default-high) variant.
How does the MAX14935FAWE+ handle supply voltage mismatches between isolated sides?
The MAX14935FAWE+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB), enabling seamless level translation without external circuitry. For example, a 3.3V MCU on Side A can communicate with a 1.8V FPGA on Side B. The device's input thresholds scale with respective supply voltages (VIH = 0.7×VDD_), and output drive strength adapts accordingly - all verified across temperature and voltage corners in the DC Electrical Characteristics tables.
MAX14935FAWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 5000Vrms
- 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
MAX14935FAWE+ FAQ
1.How can I place an order for MAX14935FAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14935FAWE+ 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 MAX14935FAWE+ reliable?
The price and inventory of MAX14935FAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14935FAWE+ is usually 5 days.
3.What payment methods are accepted for MAX14935FAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14935FAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14935FAWE+?
MAX14935FAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14935FAWE+ 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 MAX14935FAWE+?
For technical support, including MAX14935FAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14935FAWE+ requirements.
6.How does Aetrix verify that MAX14935FAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX14935FAWE+ 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 MAX14935FAWE+ meets industry standards.
7.What is the process for return or replacement of MAX14935FAWE+?
All MAX14935FAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14935FAWE+, 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 MAX14935FAWE+ part is unused and in its original packaging.
Return procedure for MAX14935FAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14935FAWE+ Tags
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