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Analog Devices Inc./Maxim Integrated MAX22666CAWE+T
- Part No.:
- MAX22666CAWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22666CAWE+T.pdf
- Description:
- 6 CHANNEL REINFORCED ISOLATOR
- Quantity:
- Payment:
- Shipping:
Inventory:2,272
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Product details
Overview
MAX22666CAWE+T from Analog Devices is a six-channel, unidirectional, reinforced digital isolator in a 16-pin wide SOIC package with 8mm creepage and clearance. It delivers 200Mbps maximum data rate, 7ns typical propagation delay at 3.3V, 50kV/μs CMTI, and withstands 5kVRMS for 60s isolation voltage - enabling robust signal isolation in high-noise automotive BMS and inverter gate driver interfaces.
For engineers reviewing the MAX22666CAWE+T datasheet, MAX22666CAWE+T pinout, MAX22666CAWE+T application, or MAX22666CAWE+T equivalent, key selection criteria include its 1.71V–5.5V dual-supply flexibility, default-high output behavior, reinforced insulation certification (UL1577, cUL, VDE pending), and 6-channel unidirectional architecture optimized for isolated digital I/O and SPI slave-side signal routing.
Technical Context
The MAX22666CAWE+T implements Analog Devices' proprietary capacitive isolation technology with reinforced barrier construction, supporting independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB). Its six channels are all unidirectional - transmitting exclusively from Side A to Side B - eliminating bidirectional contention and simplifying timing analysis in deterministic control loops.
It features integrated undervoltage lockout (UVLO) with 1.6V threshold and 45mV hysteresis per supply rail, automatic output defaulting to high state during UVLO or input float, and a refresh circuit ensuring output stability during indefinite DC input conditions - critical for safety-critical automotive and industrial monitoring systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 5kVRMS for 60s (VISO); enables compliance with reinforced insulation requirements in IEC 61800-5-1 and ISO 26262 ASIL-B systems |
| Max Data Rate | 200Mbps - supports high-speed isolated SPI, digital encoder feedback, and real-time sensor streaming without oversampling penalty |
| Propagation Delay | 7ns typ at VDD = 3.3V - reduces system latency in closed-loop motor control and fast-response protection circuits |
| CMTI | 50kV/μs typ - maintains signal integrity during fast-switching transients in SiC/GaN inverter gate drive domains |
| Supply Range | 1.71V–5.5V per side - allows direct interfacing with 1.8V microcontrollers and 3.3V/5V peripherals without level shifters |
| Output Default | Default-high - ensures fail-safe logic-high assertion of enable signals or fault flags during power sequencing or input loss |
| Power @ 1Mbps | 0.71mW/channel at 1.8V - cuts total isolation power by >40% vs legacy optocouplers, easing thermal design in dense PCB layouts |
Pinout & Package
Package: 16-pin Wide SOIC (WSOIC), 8mm creepage/clearance, RoHS-compliant (W16MS+13 outline).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 VDDA | Side A power supply input | Bypass with 0.1µF capacitor; sets logic-high level for IN1–IN6 inputs and enables internal UVLO monitoring |
| 2–4 IN1–IN3 | Unidirectional input channels (A→B) | Dedicated A-side inputs with 0.7×VDDA VIH threshold; no internal pull resistors required |
| 5–7 IN4–IN6 | Unidirectional input channels (A→B) | Same electrical specs as IN1–IN3; all six inputs share identical DC and dynamic characteristics |
| 8 GNDA | Side A ground reference | Must be connected to local A-side ground plane; forms isolation barrier boundary with GNDB |
| 9 GNDB | Side B ground reference | Isolated return path for OUT1–OUT6; separates noisy power domain from sensitive controller domain |
| 10–12 OUT4–OUT6 | Unidirectional output channels (A→B) | Push-pull outputs driving B-side logic; default-high during UVLO or open input |
| 13–15 OUT1–OUT3 | Unidirectional output channels (A→B) | Identical drive strength and timing to OUT4–OUT6; full 6-channel output symmetry |
| 16 VDDB | Side B power supply input | Bypass with 0.1µF capacitor; defines logic-high level for OUT1–OUT6 and enables B-side UVLO detection |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 5kVRMS withstand (60s), 848VRMS working voltage (VIOWM), and ±12.8kV surge immunity - meets IEC 60747-5-5 and UL1577 for functional safety systems |
| Low-Power Operation | 0.71mW/channel at 1Mbps/1.8V - enables battery-backed isolated monitoring and ultra-low-quiescent industrial sensors |
| High-Speed Timing | 7ns propagation delay (typ), 2.0ns channel-to-channel skew - supports sub-10ns timing margins in 100MHz+ clock domains |
| Robust EMI Immunity | 50kV/μs CMTI (typ) and ±8kV IEC 61000-4-2 contact ESD - sustains operation in high-dv/dt motor drives and switch-mode power supplies |
| Flexible Level Translation | Independent 1.71V–5.5V supplies on both sides - eliminates external level shifters when interfacing 1.8V FPGAs to 5V PLC I/O modules |
Applications
| Automotive Battery Management System (BMS) | Industrial Isolated SPI Interface |
|---|---|
Use Scenario: Isolating cell voltage monitor ICs (e.g., MAX1785x) from MCU host across high-voltage battery pack boundaries. IC Role / Device Role / Timing Role: Unidirectional 6-channel isolator transmitting analog monitor data and status bits from A-side sensor domain to B-side MCU domain. Use Value: Enables safe 400V–800V battery pack monitoring with reinforced 5kVRMS isolation, while maintaining <10ns timing alignment across all six data/status lines. | Use Scenario: Isolating SPI bus between industrial PLC master and isolated slave peripheral (e.g., isolated ADC or DAC). IC Role / Device Role / Timing Role: Provides four unidirectional channels for MOSI, SCLK, CS, and address/data lines, plus two for status/IRQ signals - all A→B direction. Use Value: Supports 200Mbps SPI clock rates with 7ns propagation delay, eliminating timing bottlenecks in high-resolution data acquisition systems. |
| Inverter Gate Driver Interface | Medical Isolated Digital I/O |
Use Scenario: Transmitting PWM enable/fault signals from controller to isolated gate driver ICs in SiC-based motor inverters. IC Role / Device Role / Timing Role: Delivers six synchronized, low-jitter (11.1ps RMS clock jitter), default-high enable/fault signals across isolation barrier. Use Value: Guarantees <10ns pulse-width integrity under 50kV/μs common-mode transients - preventing false turn-on/turn-off of power devices. | Use Scenario: Isolating digital control and alarm signals between patient-connected front-end and hospital-grade power supply/microcontroller domain. IC Role / Device Role / Timing Role: Six unidirectional channels carrying LED indicators, button inputs, and safety interlock states with reinforced 5kVRMS barrier. Use Value: Meets IEC 60601-1 creepage/clearance (8mm) and reinforced insulation requirements while consuming <4.3mW total at 1.8V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar six-channel unidirectional digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SI8660BB-B-IS | 25Mbps max data rate; 20ns propagation delay; 35kV/μs CMTI; 3.3V-only supply range | Suitable for cost-sensitive, lower-speed industrial I/O where timing margin >20ns is acceptable | Select when 200Mbps speed and sub-10ns delay are not required, and 3.3V-only operation suffices |
| ADUM6601ARIZ-RL | Integrated isolated DC-DC converter; 25Mbps; 100kV/μs CMTI; 16-lead SOIC with different pinout | Eliminates need for external isolated power supply but adds complexity and cost for simple signal-only isolation | Choose only if isolated side power delivery is needed; otherwise MAX22666CAWE+T offers superior speed, lower power, and simpler layout |
Compared with SI8660BB-B-IS and ADUM6601ARIZ-RL, the MAX22666CAWE+T provides 8× higher data rate, 3× lower propagation delay, and 2.9× lower power at 1Mbps/1.8V - making it optimal for next-generation EV BMS, high-fidelity motor control, and compact medical I/O where speed, timing precision, and efficiency are critical.
Availability
MAX22666CAWE+T is available at Aetrix Electronics and suitable for automotive battery management systems, industrial SPI interfaces, inverter gate driver control, and medical isolated digital I/O requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX22666CAWE+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX22666CAWE+T belongs to Analog Devices' MAX2266x reinforced digital isolator family, engineered specifically for high-reliability, high-speed, low-power isolation in automotive electrification and industrial automation systems demanding ASIL-B compliance and extended temperature operation.
FAQ
What is the maximum data rate supported by the MAX22666CAWE+T?
The MAX22666CAWE+T supports a maximum data rate of 200Mbps under conditions of 2.25V ≤ VDD ≤ 5.5V. This rating is validated across the full operating temperature range (-40°C to +125°C) and applies to all six unidirectional channels. At lower supply voltages (1.71V–2.25V), the maximum data rate is 150Mbps. The device maintains signal integrity at these speeds due to its 50kV/μs CMTI and low 7ns typical propagation delay.
Does the MAX22666CAWE+T support independent supply voltages on each side?
Yes, the MAX22666CAWE+T supports fully independent supply voltages: VDDA (Side A) and VDDB (Side B) can each be set from 1.71V to 5.5V. This enables true level translation - for example, interfacing a 1.8V FPGA on Side A to a 5V microcontroller on Side B. Each supply is monitored independently for undervoltage lockout, and outputs default to high state if either supply drops below 1.6V.
What is the isolation voltage rating of the MAX22666CAWE+T and which safety standards does it meet?
The MAX22666CAWE+T has a reinforced isolation rating of 5kVRMS for 60 seconds (VISO), 848VRMS working voltage (VIOWM), and ±12.8kV surge capability. It is certified to UL1577 (File E351759), cUL (CSA Bulletin 5A), and is pending VDE 0884-11 certification. These ratings satisfy reinforced insulation requirements for functional safety in automotive (ISO 26262) and industrial (IEC 61800-5-1) applications.
How does the MAX22666CAWE+T handle undervoltage conditions on its supply rails?
The MAX22666CAWE+T incorporates independent undervoltage lockout (UVLO) circuitry on both VDDA and VDDB rails, with a 1.6V threshold and 45mV hysteresis. When either supply falls below UVLO threshold, all six outputs immediately transition to their default-high state - regardless of input state - ensuring fail-safe behavior during power-up, brownout, or supply sag events in automotive and industrial environments.
What is the pin configuration and channel directionality of the MAX22666CAWE+T?
The MAX22666CAWE+T is a 16-pin wide SOIC device with all six channels configured unidirectionally from Side A (pins 1–8) to Side B (pins 9–16). Inputs IN1–IN6 reside on Side A (pins 2–7), outputs OUT1–OUT6 on Side B (pins 10–15), with VDDA/GNDA on Side A and VDDB/GNDB on Side B. This A→B-only architecture eliminates bidirectional contention and simplifies PCB routing for isolated digital I/O expansion.
MAX22666CAWE+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:
- CAN, RS232, RS422, RS485, SPI
- Isolated Power:
- Yes
- Number of Channels:
- 6
- Inputs - Side 1/Side 2:
- 6/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.5ns, 9.9ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 0.8ns, 1ns
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX22666CAWE+T FAQ
1.How can I place an order for MAX22666CAWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22666CAWE+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 MAX22666CAWE+T reliable?
The price and inventory of MAX22666CAWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22666CAWE+T is usually 5 days.
3.What payment methods are accepted for MAX22666CAWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22666CAWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22666CAWE+T?
MAX22666CAWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22666CAWE+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 MAX22666CAWE+T?
For technical support, including MAX22666CAWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22666CAWE+T requirements.
6.How does Aetrix verify that MAX22666CAWE+T is sourced from the original manufacturer or authorized distributors?
All MAX22666CAWE+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 MAX22666CAWE+T meets industry standards.
7.What is the process for return or replacement of MAX22666CAWE+T?
All MAX22666CAWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX22666CAWE+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 MAX22666CAWE+T part is unused and in its original packaging.
Return procedure for MAX22666CAWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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