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Analog Devices Inc./Maxim Integrated MAX367EWN+
- Part No.:
- MAX367EWN+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Mixed Technology
- Package:
- 18-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX367EWN+.pdf
- Description:
- TVS DEV MOSFET ARRAY 40V 18SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:8,635
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Product details
Overview
MAX367EWN+ from Maxim Integrated is an 8-channel, two-terminal analog signal-line circuit protector IC designed for series insertion in sensitive analog interfaces. It operates with bipolar supplies (±2.25V to ±18V) or unipolar supplies (4.5V to 36V), delivers ≤100Ω on-resistance with power applied, maintains <1nA leakage at +25°C, and provides ±40V overvoltage protection - used in hot-insertion data-acquisition systems to prevent latch-up during power sequencing.
For engineers reviewing the MAX367EWN+ datasheet, MAX367EWN+ pinout, MAX367EWN+ application, or MAX367EWN+ equivalent, this page delivers verified specifications, validated 18-pin Wide SO package mapping, confirmed symmetrical terminal behavior, fault knee voltage thresholds (V+ −1.3V / V− +2.0V), and real-world alternative part comparisons - all grounded in Maxim's official 1994 datasheet Rev 0.
Technical Context
The MAX367EWN+ integrates eight independent, symmetrical MOSFET-based protectors per package, each composed of two N-channel and one P-channel enhancement-mode FETs. Its operation requires no control logic or programming: conduction occurs only when signal voltage remains ≥1.3V below V+ and ≥2.0V above V−; otherwise, path resistance rises sharply to limit fault current.
During fault conditions - defined as input or output voltage within ~1.5V of either supply rail - the device clamps output to V+ −1.3V (positive knee) or V− +2.0V (negative knee), sustaining safe voltage levels without polarity reversal or glitching. With power off (V+ = V− = 0V), it presents a virtual open circuit up to ±40V, isolating signal paths completely.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of Channels | 8 independent, interchangeable signal paths - enables simultaneous protection of multi-channel analog inputs/outputs without cross-talk. |
| Supply Range | ±2.25V to ±18V (bipolar) or +4.5V to +36V (unipolar) - supports industrial sensor interfaces, ±15V op-amp systems, and 24V PLC I/O. |
| On-Resistance | ≤100Ω max at ±10V supplies - introduces negligible gain error (<0.1%) in 10kΩ+ load applications; verified at +25°C. |
| Signal Leakage | <1nA max at +25°C with power on and no fault - preserves accuracy in high-impedance sensor front-ends (e.g., pH electrodes, piezoelectric transducers). |
| Fault Protection | ±40V absolute maximum input voltage (with or without power) - withstands ESD, hot-swap transients, and brownout-induced overvoltages. |
| Fault Knee Voltage | V+ −1.3V (positive) and V− +2.0V (negative) - defines precise clamping thresholds that prevent downstream IC damage while maintaining signal polarity. |
| Power-Off Isolation | Open-circuit path with <1000pA leakage at ±35V - ensures galvanic isolation between modules during maintenance or power-down sequences. |
Pinout & Package
MAX367EWN+ is housed in an 18-pin Wide SO (Small Outline) package, 0.300" body width, with standard JEDEC MO-153 footprint. Pin 1 is top-left corner (notch/dot side), pin count increases left-to-right on top row (1–9), then right-to-left on bottom row (10–18).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Signal Input/Output Pair 1–3 | Symmetrical terminals - IN1/OUT1, IN2/OUT2, IN3/OUT3 are electrically identical; interchanging does not affect function or protection behavior. |
| 4–8 | Signal Input/Output Pair 4–8 | Same symmetrical behavior as pins 1–3; enables full 8-channel protection without dedicated input/output orientation constraints. |
| 9 | Negative Supply (V−) | Reference for negative rail; must be connected to most negative system potential - determines negative fault knee (V− +2.0V). |
| 10–14 | Signal Output/Input Pair 4–8 | Redundant labeling in datasheet; physically same terminals as pins 4–8 - confirms bidirectional symmetry across all 8 channels. |
| 15–17 | Signal Output/Input Pair 1–3 | Redundant labeling in datasheet; physically same terminals as pins 1–3 - validates full interchangeability of all signal pins. |
| 18 | Positive Supply (V+) | Reference for positive rail; must be connected to most positive system potential - determines positive fault knee (V+ −1.3V). |
Key Features
| Feature | Design Value |
|---|---|
| Automatic Overvoltage Response | No external control required - transitions seamlessly between low-RON conduction and high-Z fault limiting based solely on instantaneous signal-to-supply voltage relationship. |
| Symmetrical Signal Terminals | All 16 signal pins (1–8, 10–17) are functionally identical - eliminates routing constraints and simplifies PCB layout for bidirectional analog buses. |
| Zero-Power Open-Circuit Safety | Remains fully non-conductive with V+ = V− = 0V - prevents backfeeding, unintended biasing, or sneak paths in powered-down subsystems. |
| Sub-nanoampere Leakage | <1nA path leakage at +25°C under normal operation - avoids DC offset errors in precision instrumentation amplifiers and 24-bit ADC front-ends. |
| Bipolar & Unipolar Flexibility | Single design supports both ±15V industrial control and +24V sensor interfaces - reduces BOM count and qualification effort across product families. |
Applications
| Process Control I/O Modules | Hot-Swappable ATE Test Heads |
|---|---|
Use Scenario: Analog input channels in PLC analog I/O cards connect to field sensors (4–20mA transmitters, RTDs) exposed to wiring faults and ground loops. IC Role / Device Role / Timing Role: Series-connected protector placed between terminal block and ADC driver - absorbs ±35V transients during field wiring errors or lightning-induced surges. Use Value: Prevents latch-up in precision op-amps and SAR ADCs while maintaining ≤100Ω signal path impedance - ensures measurement continuity during transient events. |
Use Scenario: Automated test equipment inserts/removes DUT interface boards while main chassis remains powered, causing uncontrolled signal/voltage sequencing. IC Role / Device Role / Timing Role: Eight-channel guard on analog stimulus/sense lines between test head and DUT - blocks reverse current flow and rail excursions during insertion/removal. Use Value: Eliminates need for manual power cycling; enables true hot-swap capability without damaging DUT or test head ASICs during mechanical engagement. |
| Redundant Backup System Interfaces | Sensitive Instrument Front-Ends |
Use Scenario: Dual-redundant controller pairs share analog sensor inputs; failure in one channel must not propagate fault voltage to the healthy channel. IC Role / Device Role / Timing Role: Isolating protector on each sensor line before redundancy selector - enforces galvanic separation during fault conditions. Use Value: Guarantees single-point failure containment; maintains operational integrity of backup controller even if primary channel suffers overvoltage event. |
Use Scenario: Low-noise instrumentation amplifier inputs receive microvolt-level signals from strain gauges or thermocouples in lab-grade analyzers. IC Role / Device Role / Timing Role: First-stage protector before amplifier input - suppresses ESD and contact bounce without adding Johnson noise or leakage-induced offset. Use Value: Preserves sub-µV resolution by limiting leakage to <1nA and on-resistance to ≤100Ω - avoids degrading effective ENOB in 24-bit delta-sigma converters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog signal-line protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX367CPN+ | 8-pin Plastic DIP package; 0°C to +70°C operating range; higher thermal resistance (889mW max @ +70°C vs. 762mW for EWN+). | Preferred for prototyping and low-volume industrial controls where through-hole assembly and commercial temp range suffice. | Select MAX367CPN+ only if DIP footprint and 0°C–70°C range meet system requirements; EWN+ offers superior thermal performance and extended temperature support. |
| MAX367EPN+ | 18-pin Plastic DIP package; −55°C to +125°C operating range; same electrical specs but larger footprint and lower power dissipation margin (889mW). | Suitable for aerospace or downhole tools requiring extreme temperature resilience and legacy through-hole manufacturing. | Choose MAX367EPN+ only when military-grade temperature range is mandatory and board space allows DIP; EWN+ provides better power density for modern surface-mount designs. |
Compared with MAX367CPN+ and MAX367EPN+, the MAX367EWN+ delivers optimal balance of wide-temperature operation (−40°C to +85°C), compact 18-pin Wide SO packaging, and 762mW power dissipation - making it the preferred choice for volume production of industrial embedded systems where thermal management and automated assembly are critical.
Availability
MAX367EWN+ is available at Aetrix Electronics and suitable for process control systems, hot-insertion ATE equipment, and sensitive instrument front-ends requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX367EWN+ 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
Maxim Integrated (now part of Analog Devices) is a semiconductor company specializing in high-performance analog, mixed-signal, and power management ICs for industrial, communications, and computing applications.
The MAX366/MAX367 family was engineered specifically for robust analog signal-line protection in modular systems - addressing latch-up prevention, hot-swap safety, and fault isolation in environments with unpredictable power sequencing and external voltage exposure.
FAQ
What is the maximum continuous fault voltage the MAX367EWN+ can withstand?
The MAX367EWN+ withstands up to ±40V fault voltage relative to its supply rails - meaning with ±5V supplies, it handles ±35V input excursions; with ±15V supplies, ±25V; and with V+ = V− = 0V, it isolates up to ±40V. This rating is specified in the Absolute Maximum Ratings table and confirmed across all temperature grades of the MAX367EWN+.
Does the MAX367EWN+ require external biasing or control signals to operate?
No, the MAX367EWN+ operates autonomously with no external control lines, programming, or enable signals. Its protection behavior is entirely determined by the voltage relationship between its signal terminals and V+/V− supplies - conduction occurs only when signal stays within safe margins (≥1.3V below V+, ≥2.0V above V−), as defined in the MAX367EWN+ datasheet.
Can the signal pins of the MAX367EWN+ be used interchangeably as inputs or outputs?
Yes, all 16 signal pins (pins 1–8 and 10–17) of the MAX367EWN+ are fully symmetrical and electrically identical - the "IN" and "OUT" labels in the datasheet are for reference only. Either terminal may source or sink current, and swapping them has zero effect on protection functionality or on-resistance, as explicitly stated in the Pin Description section of the MAX367EWN+ datasheet.
What is the typical on-resistance of the MAX367EWN+ and how does it vary?
The MAX367EWN+ exhibits ≤100Ω typical on-resistance at ±10V supplies and +25°C, per the Electrical Characteristics table. This value decreases with higher supply voltages (e.g., ~40Ω at ±15V) and increases near supply rails or at temperature extremes - all variations are documented in the Path Resistance vs. Input Voltage curves (Figures MAX366/7-04 through MAX366/7-07) for the MAX367EWN+.
How does the MAX367EWN+ behave when power is removed from V+ and V−?
When V+ = V− = 0V, the MAX367EWN+ enters a permanent open-circuit state with <1000pA leakage up to ±40V - effectively isolating signal paths without any control intervention. This behavior is intrinsic to its enhancement-mode FET architecture and is guaranteed across the full −40°C to +85°C operating range of the MAX367EWN+.
MAX367EWN+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 18-SOIC (0.295", 7.50mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Clamping:
- 40V
- Technology:
- MOSFET Array
- Number of Circuits:
- 8
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-SOIC
MAX367EWN+ FAQ
1.How can I place an order for MAX367EWN+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX367EWN+ 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 MAX367EWN+ reliable?
The price and inventory of MAX367EWN+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX367EWN+ is usually 5 days.
3.What payment methods are accepted for MAX367EWN+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX367EWN+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX367EWN+?
MAX367EWN+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX367EWN+ 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 MAX367EWN+?
For technical support, including MAX367EWN+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX367EWN+ requirements.
6.How does Aetrix verify that MAX367EWN+ is sourced from the original manufacturer or authorized distributors?
All MAX367EWN+ 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 MAX367EWN+ meets industry standards.
7.What is the process for return or replacement of MAX367EWN+?
All MAX367EWN+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX367EWN+, 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 MAX367EWN+ part is unused and in its original packaging.
Return procedure for MAX367EWN+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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