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Analog Devices Inc./Maxim Integrated MAX12935BAWE+T
- Part No.:
- MAX12935BAWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX12935BAWE+T.pdf
- Description:
- DGTL ISO 5000VRMS 2CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,653
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Product details
Overview
MAX12935BAWE+T from Analog Devices is a dual-channel, bidirectional digital galvanic isolator in a 16-pin wide-body SOIC package. It provides 5kVRMS isolation for 60s, supports up to 200Mbps data rate at 1.71V–5.5V supplies per side, and features opposite-direction channel configuration (IN1→OUT2, IN2→OUT1) optimized for isolated UART/RS-485 transceiver interfaces in industrial fieldbus systems.
For engineers reviewing the MAX12935BAWE+T datasheet, MAX12935BAWE+T pinout, MAX12935BAWE+T application, or MAX12935BAWE+T equivalent, key selection criteria include its 200Mbps capability with 50kV/µs CMTI, default-low output state (suffix 'B'), 1.8V–5.5V dual-supply flexibility, and UL/cUL-certified 5kVRMS isolation-critical for safety-compliant industrial and medical isolation designs.
Technical Context
The MAX12935BAWE+T implements two independent unidirectional isolation channels operating in opposite directions: Channel A accepts IN1 on Side A and drives OUT1 on Side B; Channel B accepts IN2 on Side B and drives OUT2 on Side A. This architecture enables full-duplex signal isolation across separate power domains without external direction control logic.
It uses Maxim's proprietary capacitive isolation technology with integrated refresh circuitry to maintain output accuracy during static input conditions, and features undervoltage lockout (1.5V–1.66V threshold) on both VDDA and VDDB to force outputs into their default-low state during supply faults-ensuring fail-safe behavior in critical communication links.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 200Mbps maximum-enables high-speed isolated serial interfaces such as RS-485 at full industrial baud rates. |
| Isolation Rating | 5kVRMS for 60s (UL1577/cUL)-certified for reinforced insulation in safety-critical applications. |
| CMTI | 50kV/µs typical-rejects fast common-mode transients in noisy motor drive or power supply environments. |
| Supply Range | VDDA & VDDB: 1.71V to 5.5V independently-supports level translation between 1.8V microcontrollers and 3.3V/5V transceivers. |
| Output Default | Default-low (suffix 'B')-outputs go low during power-up, undervoltage, or open-input conditions for fail-safe UART RX/TX assertion. |
| Propagation Delay | 4.1ns–20.3ns (VDD-dependent)-ensures tight timing budgets in real-time control loops and high-frequency data acquisition. |
| Operating Temp | -40°C to +125°C ambient-qualified for under-hood automotive, factory-floor PLC, and battery management systems. |
Pinout & Package
Package: 16-pin wide-body SOIC (W16MS-11), creepage/clearance ≥8mm, CTI >600 (Group I), rated for -40°C to +125°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | GNDA | Ground reference for Side A-must be connected to local A-side ground plane with low-inductance path. |
| 2, 6, 8, 10, 11, 15 | N.C. | No internal connection-leave floating; no PCB trace or thermal pad required. |
| 3 | VDDA | Side A power supply (1.71V–5.5V)-requires 0.1µF ceramic bypass to GNDA near pin. |
| 4 | IN1 | Logic input for Channel 1 (Side A)-drives OUT2 on Side B; compatible with 1.71V–5.5V logic levels. |
| 5 | IN2 | Logic input for Channel 2 (Side B)-drives OUT1 on Side A; enables bidirectional data flow. |
| 9, 16 | GNDB | Ground reference for Side B-electrically isolated from GNDA; defines B-side logic return. |
| 12 | OUT2 | Channel 2 output (Side B)-drives TTL/CMOS loads; defaults low during undervoltage. |
| 13 | IN1 | Logic input for Channel 1 (Side B)-accepts signal from Side A's OUT1; completes full-duplex path. |
| 14 | VDDB | Side B power supply (1.71V–5.5V)-requires 0.1µF ceramic bypass to GNDB near pin. |
| 16 | OUT1 | Channel 1 output (Side A)-drives Side A logic; complements IN2 to form isolated TX/RX pair. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional channel pairing | IN1→OUT2 and IN2→OUT1 routing eliminates need for external direction control in UART/RS-485 isolation. |
| Fail-safe default-low outputs | Ensures transceiver RX/TX lines assert logically low during power sequencing or fault-prevents spurious bus activity. |
| 50kV/µs CMTI | Rejects fast ground bounce from adjacent IGBTs or switching regulators without data corruption. |
| 1.71V–5.5V dual-supply range | Enables direct interface between 1.8V FPGAs and 5V industrial transceivers without external level shifters. |
| Refresh circuitry | Maintains correct output state indefinitely-even when inputs remain static-eliminating watchdog timer requirements. |
Applications
| Industrial Fieldbus Isolation | Isolated RS-485 Transceiver Interface |
|---|---|
Use Scenario: Isolating Modbus RTU nodes in factory automation networks exposed to ground potential differences and EMI. IC Role / Device Role / Timing Role: Bidirectional galvanic isolator separating controller-side logic (Side A) from bus-side transceiver (Side B), enabling full-duplex communication across 5kVRMS barrier. Use Value: Prevents ground loop currents from disrupting communication while maintaining 200Mbps timing integrity and 50kV/µs transient immunity. | Use Scenario: Protecting microcontroller UART lines from high-voltage surges in building automation RS-485 networks. IC Role / Device Role / Timing Role: Dual-channel isolator implementing TX (MCU→transceiver) and RX (transceiver→MCU) paths with matched propagation delay skew ≤2ns. Use Value: Eliminates need for discrete optocouplers or transformer-based solutions-reducing BOM count and PCB area while improving jitter performance (90ps peak eye jitter at 200Mbps). |
| Battery Management System (BMS) Communication | Medical Isolated Data Acquisition |
Use Scenario: Isolating cell-monitoring IC SPI or UART signals from main controller in EV battery packs with 400V+ stack voltages. IC Role / Device Role / Timing Role: High-CMTI isolator bridging low-voltage MCU domain (Side A) and high-side monitoring domain (Side B), supporting daisy-chained communication. Use Value: Withstands ±10kV surge (1.2/50µs) between domains and maintains <2ns channel-to-channel skew for synchronized sampling across modules. | Use Scenario: Isolating patient-connected sensor front-ends from host processing units in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Safety-certified (UL/cUL 5kVRMS) isolator enabling isolated serial telemetry from analog front-end ASICs to FPGA controllers. Use Value: Meets IEC 60601-1 creepage/clearance requirements (8mm) and provides >10¹²Ω insulation resistance at 125°C for long-term reliability in sterilized environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADUM121N1BRZ-RL7 | Single 2-channel isolator, 150Mbps max, default-high outputs, 3.75kVRMS rating | Lacks 200Mbps support and 5kVRMS certification; suitable only for non-safety-critical 3.3V-only systems | Select if lower cost and 150Mbps suffice; verify default state matches system reset behavior. |
| SI8621ED-B-IS | 2-channel isolator, 150Mbps, default-low, 5kVRMS, but only 1.71V–5.5V on one side (VDD1), 2.5V–5.5V on other (VDD2) | Asymmetric supply range limits 1.8V MCU interfacing on both sides; no 200Mbps option available | Choose when legacy Si86xx footprint compatibility is required and 150Mbps meets timing budget. |
Compared with ADUM121N1BRZ-RL7 and SI8621ED-B-IS, the MAX12935BAWE+T uniquely delivers 200Mbps operation with full 1.71V–5.5V dual-supply flexibility and UL/cUL 5kVRMS certification-making it the only option qualified for high-speed, safety-critical industrial and medical isolation where timing margin and regulatory compliance are non-negotiable.
Availability
MAX12935BAWE+T is available at Aetrix Electronics and suitable for industrial fieldbus nodes, isolated RS-485 transceivers, and battery management systems requiring stable component supply, long-term lifecycle assurance, and certified 5kVRMS isolation.
Supply support for MAX12935BAWE+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 MAX12934/MAX12935 family was designed specifically for high-speed, low-power galvanic isolation in noise-immune industrial communication interfaces-emphasizing CMTI robustness, dual-supply level shifting, and safety certification.
FAQ
What is the maximum data rate supported by the MAX12935BAWE+T?
The MAX12935BAWE+T supports a maximum data rate of 200Mbps when operating with supply voltages between 2.25V and 5.5V. At 1.71V–1.89V supplies, the guaranteed maximum rate is 150Mbps. This performance is validated across the full -40°C to +125°C temperature range and enables use in high-speed isolated serial protocols including RS-485 and CAN FD physical layer interfaces.
Does the MAX12935BAWE+T require external pull-up or pull-down resistors on its inputs or outputs?
No, the MAX12935BAWE+T does not require external pull-up or pull-down resistors. Its inputs have internal weak pull-up (for MAX1293_B/C variants) or pull-down (for MAX1293_E/F variants) current sources (±1.5µA to ±10µA), and its outputs feature push-pull drivers capable of directly driving TTL and CMOS logic without external biasing-reducing component count and board space.
How does the undervoltage lockout (UVLO) function in the MAX12935BAWE+T affect system behavior during power-up?
The MAX12935BAWE+T monitors both VDDA and VDDB independently. If either supply falls below 1.5V–1.66V (with 45mV hysteresis), all outputs immediately transition to their default-low state-regardless of input conditions. This ensures predictable, fail-safe behavior during brownouts or asymmetric power sequencing, preventing undefined states on isolated UART or RS-485 bus lines.
Can the MAX12935BAWE+T be used for level translation between different logic families?
Yes, the MAX12935BAWE+T supports true bidirectional level translation: VDDA (1.71V–5.5V) sets logic thresholds on Side A, and VDDB (1.71V–5.5V) sets them on Side B. This allows direct interfacing between 1.8V microcontrollers and 5V transceivers, or 3.3V FPGAs and 2.5V ASICs-without external voltage translators-while maintaining galvanic isolation and signal integrity up to 200Mbps.
What safety certifications does the MAX12935BAWE+T hold, and what do they cover?
The MAX12935BAWE+T is certified to UL1577 and CSA Bulletin 5A (cUL) for 5000VRMS isolation voltage for 60 seconds, qualifying it for reinforced insulation per IEC 61010-1 and IEC 60601-1. It also meets IEC 60747-5-5 for VIOWM (848VRMS continuous), VIOTM (8400VP transient), and VIOSM (10kV surge), with minimum creepage/clearance of 8mm and CTI >600-covering industrial, medical, and energy metering applications.
MAX12935BAWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 32.5ns, 33.6ns
- Pulse Width Distortion (Max):
- 4ns
- 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
MAX12935BAWE+T FAQ
1.How can I place an order for MAX12935BAWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX12935BAWE+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 MAX12935BAWE+T reliable?
The price and inventory of MAX12935BAWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX12935BAWE+T is usually 5 days.
3.What payment methods are accepted for MAX12935BAWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX12935BAWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX12935BAWE+T?
MAX12935BAWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX12935BAWE+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 MAX12935BAWE+T?
For technical support, including MAX12935BAWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX12935BAWE+T requirements.
6.How does Aetrix verify that MAX12935BAWE+T is sourced from the original manufacturer or authorized distributors?
All MAX12935BAWE+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 MAX12935BAWE+T meets industry standards.
7.What is the process for return or replacement of MAX12935BAWE+T?
All MAX12935BAWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX12935BAWE+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 MAX12935BAWE+T part is unused and in its original packaging.
Return procedure for MAX12935BAWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX12935BAWE+T Tags
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