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Analog Devices Inc./Maxim Integrated MAX14432FASE+
- Part No.:
- MAX14432FASE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14432FASE+.pdf
- Description:
- DGTL ISO 3750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:178
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Product details
Overview
MAX14432FASE+ from Analog Devices is a 4-channel, unidirectional, high-speed digital galvanic isolator in a 16-pin narrow SOIC package with 3.75kVRMS isolation rating (60s), 200Mbps data rate, and default-low output logic. It supports independent 1.71V–5.5V supplies on both sides for level translation and operates across –40°C to +125°C ambient, targeting isolated RS-485, SPI, and industrial fieldbus interfaces.
For engineers reviewing the MAX14432FASE+ datasheet, MAX14432FASE+ pinout, MAX14432FASE+ application, or MAX14432FASE+ equivalent, this page delivers verified electrical specs, isolation safety ratings, channel configuration details, thermal derating curves, and real-world design context for high-reliability industrial and medical systems requiring robust noise immunity and low-power operation at 200Mbps.
Technical Context
The MAX14432FASE+ implements Maxim's proprietary silicon-dioxide-based isolation barrier with integrated CMOS transceivers on both sides, enabling bidirectional power domain separation while maintaining precise timing integrity. Its architecture supports active-low enable control per side and guarantees fail-safe output behavior (default-low) during input loss or power-down.
It features high common-mode transient immunity (50kV/µs typical), low propagation delay skew (<2ns channel-to-channel), and tight pulse-width distortion (<2ns), making it suitable for time-critical digital interfaces such as isolated clock distribution and high-speed serial buses where deterministic latency is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating (VISO) | 3.75kVRMS for 60 seconds - certifies single-protection insulation per UL1577 and CSA 5A in narrow SOIC package |
| Max Data Rate | 200Mbps - enables high-throughput isolated communication in SPI, RS-485, and digital I/O applications |
| Supply Voltage Range | 1.71V to 5.5V per side - allows flexible level translation between mixed-voltage subsystems (e.g., 1.8V MCU ↔ 3.3V peripheral) |
| Propagation Delay (tPLH/tPHL) | 4.1–20.3ns (VDD = 1.71–5.5V) - ensures sub-21ns worst-case latency critical for real-time control loops |
| CMTI | 50kV/µs typical - rejects fast common-mode transients in noisy industrial environments without signal corruption |
| Fail-Safe Delay | 50µs - defines maximum time for output to enter default-low state after input/power failure, supporting safe system shutdown |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, battery management, and industrial automation deployments |
Pinout & Package
Package: 16-pin narrow-body SOIC (package code S16MS+12), 4mm creepage/clearance, CTI ≥600 (Group I).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 (IN1–IN4) | Side A digital inputs | Accept 1.71V–5.5V logic signals; internally pulled down (IPD = 1.5–10µA) for default-low behavior |
| 5, 6, 7, 8 (OUT1–OUT4) | Side B digital outputs | Drive CMOS loads up to ±4mA; default-low when INx is open/unpowered or VDDA is absent |
| 9 (GNDA) | Side A ground reference | Return path for VDDA and all Side A logic; galvanically isolated from GNDB |
| 10 (VDDA) | Side A supply | 1.71V–5.5V input; powers input receivers and internal isolation circuitry on Side A |
| 11 (ENA) | Side A enable input | Active-low; disables all Side A inputs when pulled low, forcing outputs to default state |
| 12 (VDDB) | Side B supply | 1.71V–5.5V input; powers output drivers and isolation barrier receiver on Side B |
| 13 (GNDB) | Side B ground reference | Return path for VDDB and all Side B logic; galvanically isolated from GNDA |
| 14, 15, 16 (ENB, OUTB, NC) | Side B enable, output, no-connect | ENB controls Side B outputs; OUTB is not used in MAX14432FASE+ (unidirectional A→B only); Pin 16 is no-connect |
Key Features
| Feature | Design Value |
|---|---|
| 200Mbps data rate with <2ns channel skew | Enables deterministic timing in high-speed isolated SPI and sensor interface designs without added jitter compensation |
| 3.75kVRMS isolation (narrow SOIC) | Meets reinforced insulation requirements for industrial safety standards (UL/cUL) in compact 16-pin footprint |
| Fail-safe default-low output | Guarantees known logic state during brown-out, hot-plug, or cable disconnect-critical for safety-critical I/O |
| 50kV/µs CMTI | Rejects fast-switching noise from motor drives or power converters without bit errors or metastability |
| Independent dual-supply operation | Allows seamless interfacing between 1.8V microcontrollers and 5V fieldbus transceivers without external level shifters |
| –40°C to +125°C operation | Validated for extended temperature deployment in battery packs, motor controllers, and outdoor industrial gateways |
Applications
| Isolated SPI Interface | Industrial RS-485 Fieldbus |
|---|---|
|
Use Scenario: Isolating SPI bus between a host MCU and isolated ADC/DAC or sensor hub in a PLC backplane. IC Role / Device Role / Timing Role: Unidirectional A→B isolator transmitting clock, MOSI, and chip-select signals while blocking ground loops and EFT noise. Use Value: Maintains 200Mbps timing fidelity and 50kV/µs noise rejection to prevent SPI frame corruption in electrically noisy factory environments. |
Use Scenario: Galvanic isolation of RS-485 transceiver control lines (DE/RE) and data lines in distributed I/O modules. IC Role / Device Role / Timing Role: Provides fail-safe default-low outputs to ensure RS-485 driver remains disabled during power-up or fault conditions. Use Value: Eliminates bus contention and false triggering caused by floating control lines, improving system reliability in multi-drop networks. |
| Battery Management Systems | Medical Patient Monitoring |
|
Use Scenario: Isolating cell voltage monitoring ICs from the main BMS controller across high-voltage battery stacks (e.g., 800V EV packs). IC Role / Device Role / Timing Role: Transfers precision analog front-end status and alert signals across isolation barrier with minimal latency and zero DC path. Use Value: Achieves 3.75kVRMS withstand capability and 125°C operation required for direct integration near high-voltage cells. |
Use Scenario: Isolating ECG/EEG front-end digital control and data paths in Class II medical devices to meet IEC 60601-1 patient leakage limits. IC Role / Device Role / Timing Role: Provides certified reinforced insulation for digital signal transfer between patient-connected analog section and host processor. Use Value: Meets UL1577 and CSA 5A safety approvals with Group I CTI material, ensuring compliance without additional creepage extenders. |
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, unidirectional, 150Mbps max, 3.75kVRMS SOIC-16, default-high output | Lacks fail-safe default-low behavior; requires external pull-down for safe-off state | Select when default-high logic aligns with system control architecture and lower data rate suffices |
| ADUM2401ARWZ-RL | 4-channel, unidirectional, 1Mbps max, 2.5kVRMS SOIC-16, default-high output | Orders-of-magnitude lower speed and isolation rating; older iCoupler process | Consider only for legacy cost-sensitive designs where 1Mbps and basic isolation meet requirements |
Compared with Si8641ED-B-IS and ADUM2401ARWZ-RL, the MAX14432FASE+ uniquely combines 200Mbps speed, 3.75kVRMS reinforced isolation, and guaranteed default-low fail-safe behavior in a production-qualified narrow SOIC package-making it optimal for next-generation industrial and medical systems demanding both performance and functional safety.
Availability
MAX14432FASE+ is available at Aetrix Electronics and suitable for isolated SPI interfaces, industrial RS-485 nodes, and battery management systems requiring stable component supply, long-term lifecycle support, and certified safety compliance.
Supply support for MAX14432FASE+ 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 MAX14430–MAX14432 family was designed specifically for high-speed, low-power galvanic isolation in space-constrained industrial and medical systems-emphasizing safety certification, wide supply range, and deterministic timing over legacy optocoupler alternatives.
FAQ
What is the isolation voltage rating of the MAX14432FASE+ and how is it certified?
The MAX14432FASE+ has a 3.75kVRMS isolation rating for 60 seconds in its narrow SOIC package, certified to UL1577 and CSA Bulletin 5A (cUL). It meets reinforced insulation requirements per IEC 60747-5-5, with VIOWM = 445VRMS and VIOSM = 10kV surge (1.2/50µs). This rating is validated through production testing at 120% of VISO for 1 second and partial discharge testing at 1182VP.
Does the MAX14432FASE+ support bidirectional data flow?
No, the MAX14432FASE+ is a unidirectional isolator configured for Side A → Side B signal transmission only. Its pinout (IN1–IN4 on Side A, OUT1–OUT4 on Side B) and internal architecture do not support reverse-direction data flow. For bidirectional isolation, a separate device or complementary channel pairing would be required.
What does "default-low output" mean for the MAX14432FASE+ and why is it important?
"Default-low output" means that when any input (IN1–IN4) is unpowered, open-circuited, or held at invalid logic levels, the corresponding OUT1–OUT4 pins actively drive low. This fail-safe behavior prevents floating outputs that could cause undefined states in downstream logic-critical for safety-critical applications like RS-485 driver enable control or BMS fault signaling in the MAX14432FASE+.
Can the MAX14432FASE+ operate with different supply voltages on each side?
Yes, the MAX14432FASE+ supports independent supplies: VDDA (1.71V–5.5V) on Side A and VDDB (1.71V–5.5V) on Side B. This enables true level translation-for example, interfacing a 1.8V FPGA I/O bank with a 5V RS-485 transceiver-without external voltage translators, preserving signal integrity and reducing BOM count in the MAX14432FASE+ design.
How does the MAX14432FASE+ handle common-mode transients, and what is its CMTI specification?
The MAX14432FASE+ achieves 50kV/µs typical common-mode transient immunity (CMTI), measured per IEC 60747-5-5 with 1000V common-mode step applied between GNDA and GNDB. This high CMTI ensures reliable operation in electrically noisy environments-such as motor drives or switch-mode power supplies-where rapid ground potential shifts would corrupt signals in lower-CMTI isolators.
MAX14432FASE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 2/2
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.4ns, 9.2ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 1.6ns, 1.4ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX14432FASE+ FAQ
1.How can I place an order for MAX14432FASE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14432FASE+ 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 MAX14432FASE+ reliable?
The price and inventory of MAX14432FASE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14432FASE+ is usually 5 days.
3.What payment methods are accepted for MAX14432FASE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14432FASE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14432FASE+?
MAX14432FASE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14432FASE+ 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 MAX14432FASE+?
For technical support, including MAX14432FASE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14432FASE+ requirements.
6.How does Aetrix verify that MAX14432FASE+ is sourced from the original manufacturer or authorized distributors?
All MAX14432FASE+ 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 MAX14432FASE+ meets industry standards.
7.What is the process for return or replacement of MAX14432FASE+?
All MAX14432FASE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14432FASE+, 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 MAX14432FASE+ part is unused and in its original packaging.
Return procedure for MAX14432FASE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14432FASE+ Tags
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