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Analog Devices Inc./Maxim Integrated MAX14935EAWE+
- Part No.:
- MAX14935EAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14935EAWE+.pdf
- Description:
- DGTL ISO 5000VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:235
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Product details
Overview
MAX14935EAWE+ from Maxim Integrated is a four-channel, 5kVRMS galvanically isolated digital isolator with unidirectional channel configuration (3 channels A→B, 1 channel B→A), 25Mbps maximum data rate, 1.71V–5.5V dual-supply operation, and -40°C to +125°C ambient rating. It serves as a robust signal isolation barrier in industrial fieldbus interfaces, isolated SPI/RS-485 transceivers, and battery management systems requiring reinforced insulation.
For engineers reviewing the MAX14935EAWE+ datasheet, MAX14935EAWE+ pinout, MAX14935EAWE+ application, or MAX14935EAWE+ equivalent, this page delivers verified electrical specifications, functional pin mapping, safety-certified isolation parameters, and real-world implementation guidance for high-reliability embedded isolation design.
Technical Context
The MAX14935EAWE+ implements capacitive isolation using Maxim's proprietary silicon-dioxide dielectric barrier, supporting independent 1.71V–5.5V supplies on each side for level translation. Its channel architecture-three A-side inputs (INA1–INA3) driving B-side outputs (OUTB1–OUTB3), one B-side input (INB1) driving A-side output (OUTA1)-enables asymmetric bidirectional protocols like isolated SPI with separate control/data paths.
It features active-high enable pins (ENA/ENB) for output three-state control, 25kV/µs common-mode transient immunity (CMTI), and guaranteed propagation delay skew ≤3ns (channel-to-channel, same direction) at 25Mbps. All channels are production-tested at +125°C and qualified per UL1577, VDE 0884-11 Basic Insulation, and IEC 61000-4-5 ±10kV surge.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS withstand (60s), 848VRMS working voltage (VIOWM), 1200VP repetitive peak (VIORM) |
| Max Data Rate | 25Mbps - supports high-speed isolated SPI clock domains and RS-485 control signaling |
| Propagation Delay | 20.9–28.8ns (tPLH/tPHL @ 3.3V) - enables tight timing budgets in real-time industrial comms |
| Supply Range | 1.71V–5.5V per side - allows direct interfacing with 1.8V microcontrollers and 5V peripherals |
| CMTI | 25kV/µs - maintains signal integrity in noisy motor drive or power converter environments |
| Operating Temp | -40°C to +125°C - qualified for under-hood automotive, factory-floor PLC, and medical equipment |
| Package | 16-pin wide-body SOIC (10.3mm × 7.5mm, 8mm creepage/clearance) - meets IPC-2221 reinforced insulation spacing |
Pinout & Package
MAX14935EAWE+ uses a 16-pin wide-body SOIC package (W16M+8, outline 21-0042) with 8mm minimum creepage and clearance, optimized for reinforced insulation in high-voltage industrial applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | VDDA / VDDB | Independent logic-side (A) and field-side (B) power supplies - require local 0.1µF ceramic bypassing |
| 2, 8, 9, 15 | GNDA / GNDB | Separate ground references per isolation domain - no shared ground connection permitted |
| 3–5, 12 | INA1–INA3 / INB1 | Unidirectional logic inputs - INA1–INA3 drive OUTB1–OUTB3; INB1 drives OUTA1 |
| 6, 7, 13, 14 | OUTA1 / OUTB1–OUTB3 | CMOS-compatible outputs - rail-to-rail swing with 4mA drive strength and <2ns rise/fall times |
| 10, 11 | ENA / ENB | Active-high enable controls - internal 2µA pullup ensures defined state during power-up or disable |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | UL1577 (5kVRMS), VDE 0884-11 Basic Insulation, IEC 61000-4-5 ±10kV surge - certified for functional safety-critical systems |
| Asymmetric Channel Mapping | 3× A→B + 1× B→A - eliminates need for external logic in isolated SPI master/slave configurations |
| Low-Power High-Speed Operation | 10.1mA typical supply current @ 25Mbps / 3.3V - enables energy-efficient isolation in battery-powered BMS nodes |
| Wide Supply Flexibility | 1.71V–5.5V on both sides - supports mixed-voltage systems (e.g., 1.8V FPGA core + 5V sensor interface) |
| High CMTI Immunity | 25kV/µs - prevents data corruption during fast-switching events in inverters or servo drives |
Applications
| Industrial Fieldbus Interface | Isolated SPI Master Node |
|---|---|
|
Use Scenario: Isolating Modbus RTU or Profibus DP signals between PLC CPU and remote I/O modules exposed to 24V field wiring. IC Role / Device Role / Timing Role: Signal-level galvanic barrier separating controller-side logic (3.3V) from noisy 24V field bus, with 25Mbps headroom for diagnostics traffic. Use Value: Prevents ground loop currents and EFT-induced resets while maintaining deterministic latency (<30ns) for cycle-synchronized I/O updates. |
Use Scenario: Isolating an MCU SPI master from an isolated ADC or DAC in a high-precision data acquisition system. IC Role / Device Role / Timing Role: Unidirectional clock/data path (SCLK/MOSI → slave) plus bidirectional chip-select (CS ←→ slave), implemented via 3A→B + 1B→A channels. Use Value: Eliminates need for two separate isolators or external logic, reducing BOM count and PCB area while preserving SPI timing margins. |
| Automotive Battery Management | Medical Patient Monitoring |
|
Use Scenario: Isolating cell voltage measurement ICs (e.g., MAX17852) from the BMS host MCU in EV traction battery packs. IC Role / Device Role / Timing Role: Transmitting analog front-end status and fault signals across 500V+ potential differences with 125°C ambient tolerance. Use Value: Meets ISO 6469-3 creepage requirements and supports ASIL-B diagnostic coverage via certified 5kVRMS barrier reliability. |
Use Scenario: Isolating ECG/EEG front-end analog signal paths from digital processing units in Class II medical devices. IC Role / Device Role / Timing Role: Providing patient-connected side (B) to system side (A) isolation for digital control lines and status reporting. Use Value: Complies with IEC 60601-1 3rd ed. MOOP requirements (1200VPK basic insulation) without external safety capacitors. |
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, 25Mbps, 3.75kVRMS isolation, 1.7–5.5V supply, different pinout (no dedicated INB1/OUTA1 pairing) | Lacks native asymmetric channel mapping - requires external logic or firmware workarounds for B→A control signals | Select when legacy Si86xx footprint compatibility is required and channel direction flexibility is secondary |
| ISO6741QDWR | 4-channel, 50Mbps, 5kVRMS, 1.71–5.5V, but only 2A→B + 2B→A configuration - no 3+1 variant | Higher speed but fixed symmetric topology - unsuitable for SPI master where MOSI/MISO/Clock/CS require distinct directionality | Select when bidirectional bandwidth >25Mbps is critical and protocol symmetry permits |
Compared with Si8641ED-B-IS and ISO6741QDWR, the MAX14935EAWE+ uniquely provides a production-qualified 3A→B + 1B→A channel split in a single 16-pin SOIC, enabling optimal pin-efficiency and timing determinism for isolated SPI and fieldbus control without layout compromises or external components.
Availability
MAX14935EAWE+ is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and medical instrumentation requiring stable component supply, long-term lifecycle assurance, and certified safety isolation performance.
Supply support for MAX14935EAWE+ 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 medical applications.
The MAX14934–MAX14936 family was engineered specifically for high-reliability galvanic isolation in harsh environments, emphasizing certified safety ratings, wide temperature operation, and flexible channel directionality for fieldbus and power-system interfaces.
FAQ
What is the maximum data rate supported by the MAX14935EAWE+?
The MAX14935EAWE+ supports a maximum data rate of 25Mbps, validated across its full operating temperature range (-40°C to +125°C) and supply voltage range (1.71V–5.5V). This is confirmed in the Dynamic Electrical Characteristics table for MAX1493_B/E variants, where DRMAX = 25Mbps is explicitly specified and tested with 40ns minimum pulse width and <3ns channel-to-channel skew.
Does the MAX14935EAWE+ support level translation between different voltage domains?
Yes, the MAX14935EAWE+ supports true bidirectional level translation: VDDA can operate from 1.71V to 5.5V independently of VDDB, which also ranges from 1.71V to 5.5V. Input thresholds scale with respective supplies (VIH = 0.7×VDDx), and outputs swing rail-to-rail, enabling seamless interfacing between 1.8V microcontrollers and 5V sensors or transceivers without external level shifters.
What safety certifications does the MAX14935EAWE+ hold?
The MAX14935EAWE+ is certified to UL1577 (5kVRMS, File E351759), cUL per CSA Bulletin 5A, VDE 0884-11 Basic Insulation (File 5015017-4880-0001), and meets IEC 61000-4-5 ±10kV surge. It is rated for 848VRMS working voltage (VIOWM) and 1200VP repetitive peak (VIORM), satisfying reinforced insulation requirements for industrial and medical applications per IEC 61010-1 and IEC 60601-1.
How does the channel configuration of the MAX14935EAWE+ differ from other members of the MAX14934–MAX14936 family?
The MAX14935EAWE+ implements a 3A→B + 1B→A channel configuration: INA1–INA3 drive OUTB1–OUTB3, while INB1 drives OUTA1. This differs from MAX14934 (4A→B) and MAX14936 (2A→B + 2B→A). The MAX14935EAWE+ pinout reflects this - it lacks INA4 and OUTB4 (present on MAX14934) and omits OUTA2 and INB2 (present on MAX14936), making it optimal for asymmetric protocols like isolated SPI.
What is the propagation delay skew specification for the MAX14935EAWE+?
The MAX14935EAWE+ exhibits ≤3ns channel-to-channel propagation delay skew (tSCSLH/tSCSHL) for signals traveling in the same direction (e.g., INA1→OUTB1 vs. INA2→OUTB2), measured at 4.5–5.5V supply and +25°C. This low skew ensures deterministic timing alignment across multiple isolated data lines - critical for parallel bus isolation or multi-channel ADC synchronization.
MAX14935EAWE+ 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:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 27.5ns, 28.8ns
- Pulse Width Distortion (Max):
- 2.6ns
- 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
MAX14935EAWE+ FAQ
1.How can I place an order for MAX14935EAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14935EAWE+ 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 MAX14935EAWE+ reliable?
The price and inventory of MAX14935EAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14935EAWE+ is usually 5 days.
3.What payment methods are accepted for MAX14935EAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14935EAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14935EAWE+?
MAX14935EAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14935EAWE+ 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 MAX14935EAWE+?
For technical support, including MAX14935EAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14935EAWE+ requirements.
6.How does Aetrix verify that MAX14935EAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX14935EAWE+ 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 MAX14935EAWE+ meets industry standards.
7.What is the process for return or replacement of MAX14935EAWE+?
All MAX14935EAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14935EAWE+, 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 MAX14935EAWE+ part is unused and in its original packaging.
Return procedure for MAX14935EAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14935EAWE+ Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
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SI8710AC-B-ISR
Skyworks Solutions Inc.
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ISO7720FDR
Texas Instruments
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ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
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SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
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ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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