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Analog Devices Inc./Maxim Integrated MAX14934BAWE+
- Part No.:
- MAX14934BAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX14934BAWE+.pdf
- Description:
- DIGITAL ISOLATOR 25MBPS 4CH
- Quantity:
- Payment:
- Shipping:
Inventory:356
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Product details
Overview
MAX14934BAWE+ from Maxim Integrated is a four-channel, unidirectional 5kVRMS digital isolator with 1Mbps data rate, default-low output configuration, and 16-pin wide SOIC package. It provides galvanic isolation between circuits operating at different power domains (1.71V–5.5V on each side), supports industrial automation fieldbus interfaces, and operates across –40°C to +125°C ambient temperature.
For engineers reviewing the MAX14934BAWE+ datasheet, MAX14934BAWE+ pinout, MAX14934BAWE+ application, or MAX14934BAWE+ equivalent, this page delivers verified electrical specs, channel direction mapping, safety certifications (UL, VDE, IEC), thermal derating curves, and real-world isolation use cases in battery management and medical systems.
Technical Context
The MAX14934BAWE+ implements a fixed 4-channel unidirectional architecture: all four channels transmit from Side A (INA1–INA4) to Side B (OUTB1–OUTB4). It features independent 1.71V–5.5V supplies per side, enabling level translation, and includes active-high enable pins (ENA/ENB) for output control with internal 2µA pullups.
Its isolation barrier meets 5kVRMS withstand (60s), 848VRMS working voltage (VIOWM), and ±10kV surge immunity per IEC 61000-4-5. Common-mode transient immunity is rated at 25kV/µs, and propagation delay skew is ≤26.9ns (part-to-part) and ≤6.7ns (channel-to-channel, same direction).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s (VISO); enables single-protection safety compliance in industrial and medical systems |
| Data Rate | 1Mbps maximum - suitable for low-speed SPI, RS-232, and digital I/O isolation without signal integrity compromise |
| Supply Voltage Range | 1.71V to 5.5V per side - supports direct interfacing with 1.8V, 2.5V, 3.3V, and 5V microcontrollers and FPGAs |
| Propagation Delay | 38.2–58.4ns (varies with supply voltage) - ensures deterministic timing in real-time control loops |
| CMTI | 25kV/µs - maintains signal integrity in high-noise motor drives and power converters |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive, factory-floor, and battery-pack environments |
| Package | 16-pin wide-body SOIC (10.3mm × 7.5mm) - compatible with standard PCB assembly and offers 8mm creepage/clearance |
Pinout & Package
Package: 16-pin wide-body SOIC (W16M+8), outline 21-0042, land pattern 90-0107, RoHS-compliant.
| 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 side - essential for maintaining isolation integrity |
| 3–6 | INA1–INA4 | Unidirectional inputs on Side A - drive corresponding OUTB1–OUTB4 outputs |
| 11–14 | OUTB1–OUTB4 | Unidirectional outputs on Side B - default-low state when input unpowered |
| 7, 10 | ENA / ENB | Active-high enable controls - internal 2µA pullup to respective VDD; disables outputs when low |
| 7 (pin 7) | I.C. | Internally connected - must be left floating or tied to GNDA/VDDA (no external connection required) |
Key Features
| Feature | Design Value |
|---|---|
| 5kVRMS Isolation Barrier | UL1577, VDE 0884-11 Basic Insulation, and IEC 61000-4-5 ±10kV surge certified - eliminates need for external protection in harsh EMI environments |
| Side-A to Side-B Unidirectional Flow | Fixed 4-channel A→B direction (INA1–INA4 → OUTB1–OUTB4) - simplifies SPI slave isolation and sensor-to-processor data paths |
| Default-Low Output State | Outputs go low when inputs are unpowered - prevents undefined states during power sequencing or brownout conditions |
| Low-Power Operation at 1Mbps | Typical 1.2–2.7mA per side at 3.3V/500kHz - reduces thermal load in space-constrained modules |
| Wide Supply Range Compatibility | 1.71V–5.5V operation on both sides - enables direct interface between legacy 5V peripherals and modern 1.8V controllers |
Applications
| Industrial Fieldbus Isolation | SPI Interface Isolation |
|---|---|
Use Scenario: Isolating Modbus RTU signals between PLC master and remote I/O modules in noisy factory environments. IC Role / Device Role / Timing Role: Four-channel unidirectional isolator separating controller-side logic (INA1–INA4) from field-side transceivers (OUTB1–OUTB4). Use Value: Prevents ground loop currents and common-mode noise from disrupting serial communication at up to 1Mbps. | Use Scenario: Isolating SPI bus between MCU and isolated ADC or DAC in battery management systems. IC Role / Device Role / Timing Role: Transfers MOSI, MISO, SCLK, and CS signals across isolation barrier with matched propagation delays (≤6.7ns skew). Use Value: Maintains SPI timing margins while enabling safe high-voltage domain separation in multi-cell packs. |
| Medical Sensor Interface | RS-232 Signal Isolation |
Use Scenario: Isolating patient-connected biosensor analog front-end signals from hospital-grade monitoring equipment. IC Role / Device Role / Timing Role: Provides reinforced insulation barrier (5kVRMS, 848VRMS working voltage) between patient-side and system-side digital control lines. Use Value: Meets IEC 60601-1 MOOP requirements and prevents leakage current hazards in Class II medical devices. | Use Scenario: Isolating RS-232 UART lines between industrial PC and programmable logic controller. IC Role / Device Role / Timing Role: Translates TTL-level UART signals across isolation boundary while supporting ±15V RS-232 driver/receiver stages. Use Value: Eliminates ground potential differences that cause data corruption and port damage in long-cable installations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM1400ARWZ | 4-channel, 5kVRMS, 1Mbps, SOIC-16, default-high outputs | Requires external pull-downs if default-low behavior is needed; lower CMTI (25kV/µs same, but ADI specifies 10kV/µs min) | Select when existing design uses default-high logic or requires Analog Devices' iCoupler process compatibility |
| SI8640BB-B-IS | 4-channel, 5kVRMS, 1Mbps, SOIC-16, default-low outputs, higher supply current (3.5mA typical @3.3V/1Mbps) | Higher power consumption limits use in thermally constrained battery-powered designs | Select when Silicon Labs' AEC-Q200 qualification or extended -40°C to +125°C performance validation is required |
Compared with ADUM1400ARWZ and SI8640BB-B-IS, the MAX14934BAWE+ delivers identical 1Mbps performance and default-low behavior but achieves lower supply current (1.2–2.7mA) and integrates stronger surge immunity (±10kV) - making it optimal for energy-sensitive industrial and medical isolation where predictable power-up state is critical.
Availability
MAX14934BAWE+ is available at Aetrix Electronics and suitable for industrial fieldbus communications, isolated SPI interfaces, and medical sensor subsystems requiring stable component supply, long-term lifecycle support, and full regulatory certification traceability.
Supply support for MAX14934BAWE+ 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 precision analog, mixed-signal, and high-reliability ICs for industrial, medical, and automotive applications.
The MAX14934–MAX14936 family targets high-isolation, multichannel digital signal transfer in harsh environments - specifically engineered for fieldbus, battery management, and safety-critical medical systems demanding 5kVRMS reinforcement and extended temperature operation.
FAQ
What is the isolation voltage rating of the MAX14934BAWE+?
The MAX14934BAWE+ is rated for 5kVRMS isolation voltage (VISO) for 60 seconds per UL1577, with continuous working voltage of 848VRMS (VIOWM) and peak surge capability of ±10kV per IEC 61000-4-5. Its VDE 0884-11 certification confirms basic insulation integrity, and partial discharge testing validates barrier reliability at 2250VP.
Does the MAX14934BAWE+ support bidirectional communication?
No, the MAX14934BAWE+ is strictly unidirectional: all four channels transmit from Side A inputs (INA1–INA4) to Side B outputs (OUTB1–OUTB4). For bidirectional applications like I²C, Maxim recommends the MAX14937 - the MAX14934BAWE+ does not support reverse signal flow or shared-data-line protocols.
What is the default output state of the MAX14934BAWE+?
The MAX14934BAWE+ has a default-low output configuration: when any INAx input is unpowered or floating, the corresponding OUTBx output drives low. This behavior is inherent to the "B" suffix variant and eliminates the need for external pull-down resistors in fail-safe digital I/O designs.
Can the MAX14934BAWE+ operate with mismatched supply voltages on each side?
Yes, the MAX14934BAWE+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB), enabling true level translation. For example, it can interface a 1.8V FPGA I/O bank (Side A) with a 5V RS-232 transceiver (Side B) without external level shifters - all while maintaining full 5kVRMS isolation.
What safety certifications does the MAX14934BAWE+ hold?
The MAX14934BAWE+ holds UL1577 (File E351759), cUL (CSA Bulletin 5A), VDE 0884-11 Basic Insulation, and IEC 61000-4-5 surge certification. It meets IEC 60950-1 and IEC 61010-1 working voltage requirements (848VRMS) and is validated for medical MOOP per IEC 60601-1 - all documented in Maxim's official safety report 095-72100581-200.
MAX14934BAWE+ 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:
- RS232, RS422, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- 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
MAX14934BAWE+ FAQ
1.How can I place an order for MAX14934BAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14934BAWE+ 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 MAX14934BAWE+ reliable?
The price and inventory of MAX14934BAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14934BAWE+ is usually 5 days.
3.What payment methods are accepted for MAX14934BAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14934BAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14934BAWE+?
MAX14934BAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14934BAWE+ 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 MAX14934BAWE+?
For technical support, including MAX14934BAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14934BAWE+ requirements.
6.How does Aetrix verify that MAX14934BAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX14934BAWE+ 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 MAX14934BAWE+ meets industry standards.
7.What is the process for return or replacement of MAX14934BAWE+?
All MAX14934BAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14934BAWE+, 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 MAX14934BAWE+ part is unused and in its original packaging.
Return procedure for MAX14934BAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14934BAWE+ Tags
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SI8710AC-B-ISR
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