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Analog Devices Inc./Maxim Integrated MAX22291EASA/V+T
- Part No.:
- MAX22291EASA/V+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX22291EASA/V+T.pdf
- Description:
- REINFORCED, FAST, LOW-POWER 2-CH
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
MAX22291EASA/V+T from Analog Devices is a reinforced, two-channel digital isolator with opposite-direction data flow (IN1→OUT2, IN2→OUT1), rated for 3kVRMS withstand voltage and 200Mbps max data rate. It operates across 1.71V–5.5V dual supplies, delivers 7ns typical propagation delay at 3.3V, and supports AEC-Q100 Grade 1 automotive applications including BMS and inverter gate driver interfaces.
For engineers reviewing the MAX22291EASA/V+T datasheet, MAX22291EASA/V+T pinout, MAX22291EASA/V+T application, or MAX22291EASA/V+T equivalent, this page provides verified technical context, real-world isolation performance metrics, confirmed pin-level circuit roles, and validated alternatives for automotive and industrial isolated communication designs.
Technical Context
The MAX22291EASA/V+T implements bidirectional channel architecture-Side A inputs drive Side B outputs and vice versa-enabling full-duplex isolation of transceiver lines like RS-485 or CAN without external direction control. Its proprietary capacitive isolation barrier achieves 50kV/μs CMTI and sustains 445VRMS working voltage (VIOWM) under continuous stress.
It features independent undervoltage lockout per side (1.5V–1.66V threshold), default-low output behavior (E/F variant), and internal refresh logic to maintain output state during static input conditions. The device is qualified to AEC-Q100 Rev G Grade 1 (−40°C to +125°C ambient) and certified to UL1577 and CSA Bulletin 5A for 3kVRMS reinforced insulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3kVRMS for 60s (VISO); enables compliance with reinforced insulation requirements in automotive BMS and motor drives |
| Working Voltage | 445VRMS continuous (VIOWM); supports long-term operation in high-noise 400V DC-link environments |
| Max Data Rate | 200Mbps (C/F variant); sufficient for isolated SPI clocking up to 100MHz or high-speed CAN FD physical layer signaling |
| Propagation Delay | 7ns typical at VDD = 3.3V; reduces system latency in closed-loop motor control timing paths |
| CMTI | 50kV/μs typical; rejects fast common-mode transients from IGBT switching in inverters without data corruption |
| Supply Range | 1.71V–5.5V per side (VDDA/VDDB); allows direct interfacing with 1.8V microcontrollers and 3.3V/5V peripherals as level translator |
| Power @ 1Mbps | 0.78mW/channel at 1.8V; cuts total isolation power by >50% vs. legacy optocouplers in battery-constrained EV modules |
Pinout & Package
MAX22291EASA/V+T is housed in an 8-pin narrow SOIC package (S8MS+24 outline) with 4mm creepage and clearance, RoHS-compliant, and rated for surface-mount reflow per JEDEC J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VDDA | Side A power supply input | Bypass with 0.1µF ceramic capacitor to GNDA; sets logic-high level on input side (1.71V–5.5V) |
| 2 - OUT1 | Side A output (driven by IN2) | Push-pull output; no external pull-up needed; default-low state during undervoltage or open input |
| 3 - IN2 | Side A input (drives OUT1) | Accepts 1.71V–5.5V logic; 410mV hysteresis (MAX2229_B/E) prevents noise-induced toggling |
| 4 - GNDA | Side A ground reference | Must be isolated from GNDB; forms primary-side return path for VDDA and IN/OUT signals |
| 5 - GNDB | Side B ground reference | Must be isolated from GNDA; forms secondary-side return path for VDDB and IN/OUT signals |
| 6 - OUT2 | Side B output (driven by IN1) | Push-pull output; compatible with TTL/CMOS loads; sinks 4mA min at VOL ≤ 0.4V |
| 7 - IN1 | Side B input (drives OUT2) | Accepts 1.71V–5.5V logic; referenced to GNDB; enables full-duplex signal routing across isolation barrier |
| 8 - VDDB | Side B power supply input | Bypass with 0.1µF ceramic capacitor to GNDB; sets logic-high level on output side (1.71V–5.5V) |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Galvanic Isolation | 3kVRMS withstand (60s), 445VRMS working voltage, and ±10kV surge immunity meet IEC 60747-5-5 for automotive safety-critical systems |
| Opposite-Direction Channel Pair | IN1→OUT2 + IN2→OUT1 topology eliminates need for external direction control logic in RS-485/RS-232 transceiver isolation |
| Low-Power Operation | 0.78mW/channel @ 1Mbps/1.8V reduces thermal load in sealed battery enclosures and extends module lifetime |
| AEC-Q100 Qualified | Grade 1 qualification (−40°C to +125°C) with 100% production test at both temperatures ensures reliability in HEV powertrain electronics |
| High-Speed Timing Performance | 7ns propagation delay + 7.5ps RMS clock jitter enables precise timing alignment in isolated PWM feedback loops and encoder interfaces |
Applications
| Automotive Battery Management System (BMS) | Industrial Isolated RS-485 Transceiver |
|---|---|
Use Scenario: Isolating cell monitor IC communication between high-voltage battery stack (400–800V) and low-voltage MCU domain. IC Role / Device Role / Timing Role: Bidirectional digital isolator transferring UART commands and telemetry across 3kVRMS barrier while maintaining <10ns inter-channel skew. Use Value: Enables safe, high-CMTI communication without optocoupler latency or aging drift; supports ASIL-B functional safety decomposition. |
Use Scenario: Isolating differential data lines (A/B) and control signals (DE/RE) of an RS-485 transceiver in factory automation PLCs. IC Role / Device Role / Timing Role: Dual-channel isolator with opposite-direction flow handling Tx (MCU→transceiver) and Rx (transceiver→MCU) paths independently. Use Value: Eliminates external direction-control logic and reduces PCB area vs. discrete isolator + gate solution; maintains 200Mbps margin for future protocol upgrades. |
| EV Onboard Charger (OBC) Control | Solar Inverter Gate Driver Interface |
Use Scenario: Isolating digital control signals (PWM enable, fault flags) between OBC's 3.3V MCU and 12V auxiliary power stage. IC Role / Device Role / Timing Role: Level-translating isolator operating at 1.8V/3.3V supplies with sub-10ns propagation delay for tight timing margins. Use Value: Reduces system power by 60% vs. legacy isolators; meets CISPR-25 Class 5 EMI requirements due to low EMI emissions from capacitive coupling. |
Use Scenario: Isolating gate drive signals from DSP controller to SiC MOSFET half-bridge in 1000V DC-link solar inverters. IC Role / Device Role / Timing Role: High-CMTI isolator rejecting >50kV/μs common-mode transients induced by fast SiC switching edges. Use Value: Prevents false triggering of gate drivers during dV/dt events; maintains 445VRMS working voltage rating for 25-year field life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8621ED-IS | 2-channel, opposite-direction, 2.5kVRMS VISO, 150Mbps max, 1.8–5.5V supplies, default-low outputs | Lacks AEC-Q100 qualification; VIOWM = 375VRMS (vs. 445VRMS); lower CMTI (40kV/μs) | Valid for industrial RS-485 isolation where automotive qualification and higher working voltage are not required |
| ISO6721FDWR | 2-channel, opposite-direction, 5kVRMS VISO, 50Mbps max, 1.71–5.5V supplies, default-low outputs | Lower max data rate (50Mbps vs. 200Mbps); higher propagation delay (11ns typ); not AEC-Q100 qualified | Suitable for cost-sensitive, lower-speed BMS monitoring where 200Mbps headroom is unnecessary |
Compared with Si8621ED-IS and ISO6721FDWR, MAX22291EASA/V+T uniquely combines AEC-Q100 Grade 1 qualification, 200Mbps speed, 445VRMS working voltage, and 50kV/μs CMTI-making it the only option qualified for high-speed, safety-critical automotive inverter and charger control.
Availability
MAX22291EASA/V+T is available at Aetrix Electronics and suitable for automotive battery management systems, industrial RS-485 networks, and solar inverter gate driver interfaces requiring stable component supply, long-lifecycle support, and AEC-Q100 traceability.
Supply support for MAX22291EASA/V+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 (now part of Analog Devices, Inc., following merger with Maxim Integrated) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies.
The MAX22290/MAX22291 family was designed specifically for reinforced isolation in automotive and industrial systems demanding high speed, low power, and robust transient immunity-targeting BMS, OBC, and motor drive applications.
FAQ
What is the isolation voltage rating of the MAX22291EASA/V+T?
The MAX22291EASA/V+T has a reinforced isolation rating of 3000VRMS for 60 seconds (VISO), a maximum working voltage of 445VRMS (VIOWM), and a peak surge withstand capability of ±10kV (1.2/50μs waveform). These values are certified per UL1577 and CSA Bulletin 5A, and pending VDE 0884-11 approval. The device also meets IEC 60747-5-5 requirements for reinforced insulation.
Does the MAX22291EASA/V+T support level translation between different logic voltages?
Yes, the MAX22291EASA/V+T supports true bidirectional level translation: VDDA (1.71V–5.5V) sets the input logic thresholds on Side A, while VDDB (1.71V–5.5V) sets output drive levels on Side B. This allows direct interface between a 1.8V microcontroller and a 3.3V or 5V peripheral without external level shifters-verified across all operating temperatures and data rates up to 200Mbps.
What does the "/V" suffix indicate in MAX22291EASA/V+T?
The "/V" suffix in MAX22291EASA/V+T denotes AEC-Q100 qualification per Rev G Grade 1 standards, covering operation from −40°C to +125°C ambient temperature. All electrical parameters-including propagation delay, CMTI, and supply current-are 100% production tested at both +25°C and +125°C, and the device carries full automotive traceability documentation and lot-level qualification reports.
How does the MAX22291EASA/V+T handle undervoltage conditions on either supply rail?
The MAX22291EASA/V+T incorporates independent undervoltage lockout (UVLO) circuits on both VDDA and VDDB rails, with thresholds of 1.5V–1.66V and 45mV hysteresis. If either supply drops below UVLO, both outputs immediately enter their default-low state-ensuring fail-safe behavior in automotive power sequencing scenarios without requiring external reset supervision.
Is the MAX22291EASA/V+T pin-compatible with other devices in the MAX22290/MAX22291 family?
No-MAX22291EASA/V+T is not pin-compatible with MAX22290 variants due to reversed channel direction (IN1→OUT2/IN2→OUT1 vs. IN1→OUT1/IN2→OUT2). However, it shares identical 8-pin narrow SOIC packaging, pin numbering, and supply/ground layout with MAX22291CASA/V+T and MAX22291FASA/V+T, differing only in data rate (200Mbps) and output default state (low).
MAX22291EASA/V+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN, RS232, RS422, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 2
- Inputs - Side 1/Side 2:
- 1/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 30.7ns, 32.1ns
- Pulse Width Distortion (Max):
- 4ns
- Rise / Fall Time (Typ):
- 0.8ns, 1ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX22291EASA/V+T FAQ
1.How can I place an order for MAX22291EASA/V+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22291EASA/V+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 MAX22291EASA/V+T reliable?
The price and inventory of MAX22291EASA/V+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22291EASA/V+T is usually 5 days.
3.What payment methods are accepted for MAX22291EASA/V+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22291EASA/V+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22291EASA/V+T?
MAX22291EASA/V+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22291EASA/V+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 MAX22291EASA/V+T?
For technical support, including MAX22291EASA/V+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22291EASA/V+T requirements.
6.How does Aetrix verify that MAX22291EASA/V+T is sourced from the original manufacturer or authorized distributors?
All MAX22291EASA/V+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 MAX22291EASA/V+T meets industry standards.
7.What is the process for return or replacement of MAX22291EASA/V+T?
All MAX22291EASA/V+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX22291EASA/V+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 MAX22291EASA/V+T part is unused and in its original packaging.
Return procedure for MAX22291EASA/V+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22291EASA/V+T Tags
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ISO1212DBQR
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ISO6721BDR
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SI8710AC-B-ISR
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ISO7720FDR
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ISO7721DR
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ISO6741FQDWRQ1
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ISO7741FDWR
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