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Analog Devices Inc./Maxim Integrated MAX14430CASE+
- Part No.:
- MAX14430CASE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14430CASE+.pdf
- Description:
- 4-CHANNEL, LOW POWER, 3.75KV DIG
- Quantity:
- Payment:
- Shipping:
Inventory:437
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Product details
Overview
MAX14430CASE+ 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 max data rate, and default-high outputs. It operates across 1.71V–5.5V dual supplies per side and supports isolated RS-485, SPI, and industrial fieldbus interfaces requiring robust noise immunity and low power at 1.8V.
For engineers reviewing the MAX14430CASE+ datasheet, MAX14430CASE+ pinout, MAX14430CASE+ application, or MAX14430CASE+ equivalent, this device is selected for high-CMTI (>50kV/μs), fail-safe operation, and level-shifting capability between disparate voltage domains in safety-critical industrial and medical systems.
Technical Context
The MAX14430CASE+ implements capacitive isolation using Maxim's proprietary process, enabling signal transfer across galvanically separated domains while maintaining VIOWM = 445VRMS continuous working voltage and VISO = 3.75kVRMS withstand rating. Its architecture supports independent A-side and B-side supply rails (1.71V–5.5V), enabling bidirectional level translation without external circuitry.
It features active-high output enable (EN_) on both sides, default-high output state during input open-circuit or power loss, and integrated fail-safe delay (tFS = 50µs) to ensure deterministic output behavior under fault conditions - critical for IEC 61000-4-5 surge-immune designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating (VISO) | 3.75kVRMS for 60s - qualifies for reinforced insulation in narrow SOIC package per UL1577 and CSA 5A. |
| Max Data Rate | 200Mbps - enables high-speed serial links such as isolated SPI clock/data paths or fast digital I/O. |
| CMTI | 50kV/μs typical - ensures reliable operation in noisy motor drives or power converters with rapid common-mode transients. |
| Supply Range | 1.71V–5.5V per side - allows direct interfacing with 1.8V, 2.5V, 3.3V, and 5V logic without level shifters. |
| Propagation Delay | 4.1–9.2ns (tPLH, VDD ≥ 4.5V) - supports tight timing budgets in real-time control loops. |
| Fail-Safe Delay | 50µs - guarantees defined output state within 50µs of input power loss or open-circuit, meeting functional safety requirements. |
| Operating Temp | –40°C to +125°C - suitable for under-hood automotive, industrial PLC, and battery management environments. |
Pinout & Package
Package: 16-pin narrow-body SOIC (S16MS+12), 4mm creepage/clearance, CTI > 600 (Group I).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | A-side supply | Power for input-side logic and isolator transmitter; accepts 1.71V–5.5V. |
| GNDA | A-side ground | Reference for all A-side signals; galvanically isolated from GNDB. |
| IN1–IN4 | A-side digital inputs | Accept CMOS/TTL-compatible signals; VIH = 0.7×VDDA, VIL = 0.8V (min). |
| ENA | A-side output enable | Active-high; disables A-side outputs when low (high-impedance state). |
| VDDB | B-side supply | Independent power for output-side logic; 1.71V–5.5V, isolated from VDDA. |
| GNDB | B-side ground | Reference for B-side outputs; fully isolated from GNDA. |
| OUT1–OUT4 | B-side digital outputs | Default-high outputs; VOH ≥ VDDB – 0.4V @ 4mA sink, VOL ≤ 0.4V @ 4mA source. |
| ENB | B-side output enable | Active-high; controls tristate behavior of B-side outputs. |
Key Features
| Feature | Design Value |
|---|---|
| High CMTI | 50kV/μs typical - prevents false triggering in high-dv/dt environments like inverters and SMPS. |
| Low Power at 1.8V | 0.49–1.54mA per side at 50MHz (VDDA = 1.8V) - extends battery life in portable isolated sensors. |
| Fail-Safe Output | Outputs go high within 50µs of input loss - eliminates undefined states in safety-critical control paths. |
| Surge Immunity | ±10kV (1.2/50μs) between GNDA/GNDB - meets IEC 61000-4-5 Level 4 for industrial equipment. |
| Level Translation | 1.71V–5.5V supplies on both sides - enables seamless interface between mixed-voltage subsystems (e.g., 1.8V MCU ↔ 3.3V ADC). |
Applications
| Isolated SPI Interface | Industrial Fieldbus |
|---|---|
Use Scenario: Isolating SPI communication between a microcontroller and isolated ADC/DAC in a motor drive control board. IC Role / Device Role / Timing Role: Four-channel unidirectional isolator separating MOSI/MISO/SCLK/CS signals with matched propagation delays (<2ns skew) to preserve timing integrity. Use Value: Enables safe, high-speed sampling at up to 200Mbps while blocking ground loops and common-mode noise from power stage switching. | Use Scenario: Signal isolation in PROFIBUS-DP or Modbus RTU nodes deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Galvanic barrier for RS-485 transceiver control lines and status signals, supporting 25–200Mbps data rates with fail-safe defaults. Use Value: Prevents bus faults from propagating across zones, maintains communication integrity during ESD/surge events per IEC 61000-4-2/4-5. |
| Isolated RS-485/RS-422 | Battery Management Systems |
Use Scenario: Isolating DE/RE control and data lines of an RS-485 transceiver in a solar inverter master controller. IC Role / Device Role / Timing Role: Unidirectional isolator for direction control (DE/RE) and bidirectional data path (RX/TX) with <10ns propagation delay variation. Use Value: Eliminates ground potential differences between inverter stacks, avoids data corruption during high dv/dt transients. | Use Scenario: Isolating cell monitoring IC communication (e.g., LTC6813) from main system MCU in a 400V EV battery pack. IC Role / Device Role / Timing Role: High-reliability isolator for UART or SPI links carrying voltage/temperature telemetry across 3.75kVRMS barrier. Use Value: Meets reinforced insulation requirements for ASIL-B systems while enabling real-time cell balancing commands with sub-10ns jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8641ED-IS | 4-channel, 200Mbps, 5kVRMS SOIC-16, default-low outputs, higher supply current (1.2mA/channel @ 1Mbps/3.3V) | Requires external pull-ups for default-high behavior; lacks integrated fail-safe delay | Select when higher isolation rating (5kVRMS) is mandatory and default-low logic is acceptable. |
| ADUM140D0BRZ | 4-channel, 150Mbps, 3.75kVRMS SOIC-16, default-high, lower CMTI (35kV/μs), higher propagation delay (20ns typ) | Not suitable for 200Mbps SPI or fast fieldbus; less robust in high-noise motor control | Choose for cost-sensitive, lower-speed applications where 150Mbps suffices and CMTI >40kV/μs is not required. |
Compared with SI8641ED-IS and ADUM140D0BRZ, the MAX14430CASE+ delivers superior timing precision (sub-10ns delay), built-in fail-safe behavior, and lowest power at 1.8V - making it optimal for next-generation battery-powered and high-reliability industrial isolators.
Availability
MAX14430CASE+ is available at Aetrix Electronics and suitable for isolated SPI interfaces, industrial fieldbus nodes, and battery management systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX14430CASE+ 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 for high-speed, low-power galvanic isolation in harsh industrial and medical environments - emphasizing CMTI resilience, fail-safe reliability, and multi-voltage interoperability.
FAQ
What is the maximum isolation voltage rating for MAX14430CASE+?
The MAX14430CASE+ has a 3.75kVRMS isolation rating for 60 seconds in its narrow SOIC package, certified to UL1577 and CSA Bulletin 5A. This corresponds to VIOWM = 445VRMS continuous working voltage and VIOSM = ±10kV surge (1.2/50μs), making it suitable for reinforced insulation in industrial safety applications.
Does MAX14430CASE+ support different supply voltages on each side?
Yes, MAX14430CASE+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB). This enables true level translation - for example, interfacing a 1.8V FPGA I/O bank with a 3.3V isolated RS-485 transceiver - without external level shifters or shared ground references.
What is the default output state of MAX14430CASE+?
The MAX14430CASE+ has a default-high output configuration: when any input (IN1–IN4) is unpowered or open-circuit, the corresponding output (OUT1–OUT4) assumes a logic-high state. This behavior is intrinsic to the device design and does not require external pull-up resistors.
How does MAX14430CASE+ handle power loss on the input side?
Upon loss of power or open-circuit condition on the input side, MAX14430CASE+ activates its internal fail-safe mechanism, driving all outputs high within 50µs. This deterministic response ensures downstream circuits receive a known state - critical for preventing undefined behavior in safety-critical control loops.
Is MAX14430CASE+ compatible with 200Mbps SPI clock signals?
Yes, MAX14430CASE+ supports up to 200Mbps data rates with propagation delay as low as 4.1ns (tPLH) and pulse width distortion under 2ns - fully sufficient for SPI clock frequencies up to 100MHz (200Mbps NRZ). Its low jitter (90ps peak eye diagram) preserves signal integrity in high-speed full-duplex SPI links.
MAX14430CASE+ 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:
- CAN, RS422, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.2ns, 9.4ns
- 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
MAX14430CASE+ FAQ
1.How can I place an order for MAX14430CASE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14430CASE+ 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 MAX14430CASE+ reliable?
The price and inventory of MAX14430CASE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14430CASE+ is usually 5 days.
3.What payment methods are accepted for MAX14430CASE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14430CASE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14430CASE+?
MAX14430CASE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14430CASE+ 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 MAX14430CASE+?
For technical support, including MAX14430CASE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14430CASE+ requirements.
6.How does Aetrix verify that MAX14430CASE+ is sourced from the original manufacturer or authorized distributors?
All MAX14430CASE+ 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 MAX14430CASE+ meets industry standards.
7.What is the process for return or replacement of MAX14430CASE+?
All MAX14430CASE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX14430CASE+, 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 MAX14430CASE+ part is unused and in its original packaging.
Return procedure for MAX14430CASE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14430CASE+ Tags
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ISO1212DBQR
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SI8710AC-B-ISR
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