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Analog Devices Inc./Maxim Integrated MAX12935CAWE+T
- Part No.:
- MAX12935CAWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX12935CAWE+T.pdf
- Description:
- 2-CHANNEL, 5KVRMS DIGITAL ISOLAT
- Quantity:
- Payment:
- Shipping:
Inventory:4,747
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Product details
Overview
MAX12935CAWE+T from Analog Devices is a dual-channel, bidirectional digital galvanic isolator in a 16-pin wide-body SOIC package, rated for 5kVRMS isolation (60s), supporting up to 200Mbps data rate with 1.71V–5.5V dual-supply operation and 50kV/µs CMTI. It isolates TX/RX lines in isolated transceivers such as RS-485 or CAN interfaces while enabling level translation between disparate voltage domains.
For engineers reviewing the MAX12935CAWE+T datasheet, MAX12935CAWE+T pinout, MAX12935CAWE+T application, or MAX12935CAWE+T equivalent, key selection criteria include channel directionality (opposite-direction), default-low output state (suffix 'C'), 200Mbps capability (suffix 'A'), and compliance with UL1577/cUL CSA 5A safety standards for industrial and medical isolation.
Technical Context
The MAX12935CAWE+T implements two independent unidirectional isolation channels operating in opposite directions - IN1→OUT2 on side B and IN2→OUT1 on side A - enabling full-duplex signal isolation without external direction control logic. Its proprietary capacitive isolation barrier supports continuous 848VRMS working voltage and ±10kV surge immunity (1.2/50µs).
It features integrated undervoltage lockout (UVLO) on both VDDA and VDDB supplies (1.5V–1.66V threshold), forcing outputs to default-low state during supply faults, and includes refresh circuitry to maintain output accuracy during indefinite DC input conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s (UL1577 certified); enables reinforced insulation in safety-critical industrial and medical systems |
| Max Data Rate | 200Mbps (C/F variant); supports high-speed serial protocols including isolated UART, SPI clock lines, and fast RS-485 |
| Supply Range | VDDA & VDDB = 1.71V–5.5V independently; allows level translation between 1.8V microcontrollers and 3.3V/5V peripherals |
| CMTI | 50kV/µs typical; ensures robust noise immunity in noisy motor drives and power converters |
| Propagation Delay | 4.1–9.2ns (tPLH at 3.3V); guarantees tight timing margins in real-time communication links |
| Default Output State | Low (suffix 'C'); prevents floating bus states during power-up or input disconnection in RS-485 transceiver control |
| Operating Temp | -40°C to +125°C ambient; qualified for under-hood automotive and industrial PLC environments |
Pinout & Package
MAX12935CAWE+T is housed in a 16-pin wide-body SOIC (W16MS-11) with 8mm creepage/clearance, CTI ≥600 (Group I), and RoHS-compliant packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7 | GNDA | Ground reference for side A; must be connected to local low-noise analog/digital ground |
| 2, 6, 8, 10, 11, 15 | N.C. | No internal connection; left unconnected per design; no routing or stitching required |
| 3 | VDDA | Side A power supply (1.71–5.5V); requires 0.1µF ceramic bypass to GNDA |
| 4 | IN1 | Input for channel 1 on side A; drives OUT2 on side B (opposite-direction path) |
| 5 | IN2 | Input for channel 2 on side A; drives OUT1 on side B (opposite-direction path) |
| 9, 16 | GNDB | Ground reference for side B; isolated from GNDA; connects to transceiver ground domain |
| 12 | OUT2 | Output of channel 2 on side B; driven by IN1 on side A; used for RX isolation |
| 13 | IN1 | Input for channel 1 on side B; drives OUT1 on side A; used for TX isolation |
| 14 | VDDB | Side B power supply (1.71–5.5V); requires 0.1µF ceramic bypass to GNDB |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional Channel Architecture | IN1→OUT2 and IN2→OUT1 paths enable native full-duplex isolation without external direction logic or multiplexing |
| Default-Low Output Behavior | Ensures fail-safe low state on all outputs during UVLO or open-input conditions, critical for RS-485 driver enable control |
| 200Mbps High-Speed Operation | Supports isolated SPI clock distribution and fast UART links without timing bottlenecks or added jitter |
| 50kV/µs Common-Mode Transient Immunity | Prevents data corruption in high-dv/dt environments like motor inverters and switch-mode power supplies |
| Independent Dual-Supply Level Translation | VDDA and VDDB can differ (e.g., 1.8V MCU ↔ 5V transceiver), eliminating external level shifters |
Applications
| Industrial Fieldbus Isolation | Isolated CAN Transceiver Interface |
|---|---|
Use Scenario: Isolating RS-485 PHY layer in programmable logic controllers (PLCs) communicating over Modbus RTU in factory automation. IC Role / Device Role / Timing Role: Bidirectional isolator separating controller-side logic (side A) from bus-side transceiver (side B), handling TX and RX signals across isolation barrier. Use Value: Prevents ground loop currents and high-voltage transients from damaging the controller while maintaining 200Mbps timing integrity for deterministic cycle times. | Use Scenario: Galvanically isolating CAN FD nodes in battery management systems (BMS) where cell monitoring ICs communicate with central MCU over noisy high-voltage battery packs. IC Role / Device Role / Timing Role: Provides separate TX and RX isolation paths with sub-10ns propagation delay skew to preserve CAN bit timing and sampling point accuracy. Use Value: Enables reliable 5Mbps CAN FD communication across 5kVRMS barrier while meeting automotive-grade -40°C to +125°C operation and UL/cUL safety certification. |
| Medical Patient Monitoring Interface | Isolated Digital I/O for Motor Drives |
Use Scenario: Isolating ECG/EEG sensor front-end digital outputs from host processing unit in Class II medical devices requiring reinforced insulation per IEC 60601-1. IC Role / Device Role / Timing Role: Transfers digitized biopotential data across isolation barrier with <90ps peak eye jitter at 200Mbps, preserving signal fidelity. Use Value: Meets 848VRMS continuous working voltage requirement and 10kV surge immunity for patient-connected equipment, reducing risk of leakage current hazards. | Use Scenario: Isolating PWM gate-drive signals and feedback signals (e.g., current sense ADC outputs) in industrial servo drives with IGBT modules switching at >20kHz. IC Role / Device Role / Timing Role: Delivers precise, low-skew (<2ns channel-to-channel) timing for isolated gate drivers and captures fast current-sense pulses without distortion. Use Value: Maintains system stability under 50kV/µs common-mode transients generated by IGBT switching, preventing false triggering or missed fault detection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8621ED-B-IS | 2-channel, opposite-direction, 150Mbps max, default-high output, 3.75kVRMS isolation | Limited to 150Mbps and lower isolation rating; not suitable for 200Mbps or 5kVRMS safety-critical designs | Select when cost sensitivity outweighs speed/safety requirements and default-high behavior aligns with system reset logic |
| ISO6721DR | 2-channel, same-direction only, 50Mbps max, 5kVRMS, default-low, SOIC-16 | Unidirectional architecture requires external logic for full-duplex; insufficient for RS-485 TX/RX isolation without redesign | Choose only for simple digital I/O isolation where bidirectional signaling is not needed |
Compared with SI8621ED-B-IS and ISO6721DR, the MAX12935CAWE+T uniquely delivers 200Mbps bidirectional isolation with 5kVRMS rating and default-low outputs in a drop-in SOIC-16 footprint-enabling higher-speed, safer, and simpler full-duplex interface designs without layout or logic changes.
Availability
MAX12935CAWE+T is available at Aetrix Electronics and suitable for industrial fieldbus, medical monitoring, and automotive BMS applications requiring stable component supply, long-term lifecycle support, and certified safety isolation.
Supply support for MAX12935CAWE+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 precision instrumentation, industrial automation, and communications markets.
The MAX12935CAWE+T belongs to the MAX1293x family of high-speed digital isolators, designed specifically for demanding full-duplex isolation in industrial, medical, and energy systems where speed, safety, and reliability are non-negotiable.
FAQ
What is the maximum data rate supported by the MAX12935CAWE+T?
The MAX12935CAWE+T supports a maximum data rate of 200Mbps, verified for C/F variants across the full 1.71V–5.5V supply range. At 1.8V supply, the guaranteed minimum is 150Mbps. This enables use in high-speed isolated serial interfaces including SPI clock lines and fast UART links without timing degradation.
Does the MAX12935CAWE+T require specific power supply sequencing?
No, the MAX12935CAWE+T does not require strict power supply sequencing. VDDA and VDDB operate independently and may be powered in any order or at different voltages within 1.71V–5.5V. Undervoltage lockout ensures safe default-low outputs regardless of sequencing, simplifying system power architecture.
How does the MAX12935CAWE+T handle undervoltage conditions on either side?
When undervoltage is detected on VDDA or VDDB (below 1.5V–1.66V threshold), the MAX12935CAWE+T forces all outputs to their default-low state-regardless of input state-to prevent undefined logic levels. This behavior is documented in Table 3 of the datasheet and applies identically to both sides of the isolation barrier.
What is the meaning of the 'C' and 'A' suffixes in MAX12935CAWE+T?
In MAX12935CAWE+T, 'C' denotes default-low output configuration, and 'A' indicates 200Mbps data rate capability (C/F variant). The 'W' specifies wide-body SOIC package, 'E' indicates tape-and-reel packaging, and '+T' confirms RoHS-compliant, lead-free finish-fully consistent with Analog Devices' ordering nomenclature.
Can the MAX12935CAWE+T be used for level translation between different logic families?
Yes, the MAX12935CAWE+T supports true bidirectional level translation: VDDA (1.71V–5.5V) sets side A logic levels, and VDDB (1.71V–5.5V) sets side B levels. For example, it can translate 1.8V LVCMOS signals on side A to 3.3V or 5V CMOS on side B-eliminating external level shifters in isolated interface designs.
MAX12935CAWE+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):
- 33.6ns, 32.5ns
- 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
MAX12935CAWE+T FAQ
1.How can I place an order for MAX12935CAWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX12935CAWE+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 MAX12935CAWE+T reliable?
The price and inventory of MAX12935CAWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX12935CAWE+T is usually 5 days.
3.What payment methods are accepted for MAX12935CAWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX12935CAWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX12935CAWE+T?
MAX12935CAWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX12935CAWE+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 MAX12935CAWE+T?
For technical support, including MAX12935CAWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX12935CAWE+T requirements.
6.How does Aetrix verify that MAX12935CAWE+T is sourced from the original manufacturer or authorized distributors?
All MAX12935CAWE+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 MAX12935CAWE+T meets industry standards.
7.What is the process for return or replacement of MAX12935CAWE+T?
All MAX12935CAWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX12935CAWE+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 MAX12935CAWE+T part is unused and in its original packaging.
Return procedure for MAX12935CAWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX12935CAWE+T Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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