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Analog Devices Inc./Maxim Integrated MAX366ESA+
- Part No.:
- MAX366ESA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Mixed Technology
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX366ESA+.pdf
- Description:
- TVS DEVICE MIXED 40V 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:313
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Product details
Overview
MAX366ESA+ from Maxim Integrated is a triple-channel, two-terminal analog signal-line protector IC designed for series insertion in sensitive analog signal paths. It provides ±40V overvoltage protection with symmetrical, interchangeable IN/OUT terminals, 100Ω max on-resistance at ±10V supplies, <1nA leakage at +25°C, and automatic fault clamping to ~1.5V below V+ or ~2V above V− - deployed in process control I/O modules and hot-insertion data-acquisition front-ends.
For engineers reviewing the MAX366ESA+ datasheet, MAX366ESA+ pinout, MAX366ESA+ application, or MAX366ESA+ equivalent, this page delivers verified package mapping (8-pin SO), confirmed three-channel protector topology, validated bipolar/unipolar supply operation (±2.25V to ±18V or 4.5V to 36V), real-world fault knee behavior, and direct alternative part comparisons grounded in manufacturer-specified performance boundaries.
Technical Context
The MAX366ESA+ implements a voltage-sensitive MOSFET array architecture with three independent, fully symmetrical protector cells. Each cell integrates two N-channel and one P-channel enhancement-mode FETs, enabling automatic transition between low-resistance conduction (<100Ω) during normal operation and high-impedance limiting (>100kΩ) when input or output voltage approaches within ~1.5V of either supply rail.
It operates without control pins or programming: protection is entirely supply-rail referenced and self-activating. Fault current flows only between signal terminals - zero DC path to V+ or V− - and maintains polarity integrity with no glitches or reversals during fault entry/exit, even during power-up/down transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Protector Count | Three independent, symmetrical two-terminal protectors per device |
| Overvoltage Protection | ±40V maximum fault tolerance relative to opposite supply rail (e.g., +35V with ±5V supplies) |
| On-Resistance (RIN-OUT) | ≤100Ω at ±10V supplies - ensures minimal signal attenuation in high-impedance circuits |
| Signal-Path Leakage | <1nA at +25°C under normal conditions - preserves accuracy in µV-level sensor interfaces |
| Supply Range | Unipolar: 4.5V to 36V; Bipolar: ±2.25V to ±18V - supports industrial and precision analog rails |
| Fault Knee Voltage | ~1.3V below V+ or ~2.0V above V− - defines clamping threshold without external components |
| Power-Off State | Open-circuit signal path (≥100MΩ) - isolates protected circuitry when unpowered |
Pinout & Package
MAX366ESA+ is housed in an 8-pin SO (Small Outline) package, 150-mil body width, with gull-wing leads and standard JEDEC MS-012AC footprint. Pin 1 is marked by beveled corner or dot; device orientation follows standard SO convention.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | Signal Terminal (IN/OUT) | Interchangeable input/output for Protector 1, 2, 3 - no directionality; bidirectional analog path |
| 4 | Positive Supply (V+) | Connects to most positive system rail; biases internal N-channel FET gates |
| 5, 6, 7 | Signal Terminal (IN/OUT) | Interchangeable input/output for Protector 1, 2, 3 - mirrored function to Pins 1–3 |
| 8 | Negative Supply (V−) | Connects to most negative system rail (or GND in single-supply); biases internal P-channel FET gate |
Key Features
| Feature | Design Value |
|---|---|
| Automatic fault response | No enable/control pins required - protection activates solely based on signal-to-supply voltage differential |
| Symmetrical terminal design | Pins 1–3 and 5–7 are functionally identical and swappable - eliminates routing constraints in PCB layout |
| Zero-power isolation | Open-circuit path when V+ = V− = 0V - prevents backfeeding and enables true hot-swap safety |
| Low-leakage fault mode | <1nA leakage during overvoltage events - avoids loading high-Z op-amp inputs or reference nodes |
| Bipolar/single-supply compatibility | Operates identically across ±2.25V to ±18V or 4.5V to 36V - simplifies reuse across mixed-rail systems |
Applications
| Process Control I/O Modules | Hot-Insertion Data-Acquisition Boards |
|---|---|
Use Scenario: Analog sensor signals (e.g., 4–20mA transmitters, RTD bridges) routed through modular backplanes subject to random power sequencing and ESD events during field maintenance. IC Role / Device Role / Timing Role: Series-connected signal-line protector placed between connector and ADC front-end - clamps transients before reaching precision amplifier stages. Use Value: Prevents latch-up and permanent damage in op-amps and voltage references during brownouts or miswiring, while adding <100Ω series resistance and no propagation delay. | Use Scenario: Plug-in measurement cards inserted into powered chassis where signal lines may contact live backplane pins before power stabilization. IC Role / Device Role / Timing Role: Three-channel protector guarding differential analog inputs (e.g., ±10V range) - each channel independently handles IN+/IN− pairs. Use Value: Enables safe hot-plug operation without external supervision logic; maintains signal integrity up to 1MHz with <3dB adjacent-channel crosstalk. |
| Redundant Backup Systems | Sensitive Instrument Front-Ends |
Use Scenario: Dual-path analog monitoring in safety-critical infrastructure (e.g., turbine vibration sensors), where failure of one path must not compromise the other. IC Role / Device Role / Timing Role: Independent protector per signal path - isolates fault propagation between redundant channels during surge events. Use Value: Eliminates need for optocouplers or relays in redundancy switching; preserves DC coupling and sub-µV offset stability across both paths. | Use Scenario: Low-noise instrumentation amplifiers measuring microvolt-level bio-signals or strain gauge outputs in lab-grade equipment. IC Role / Device Role / Timing Role: First-stage protection ahead of programmable-gain amplifier - blocks ±35V faults while contributing <1nA leakage and no added noise. Use Value: Maintains system ENOB by avoiding diode-based clamps that inject leakage and capacitance into high-Z nodes. |
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 |
|---|---|---|---|
| MAX366CSA+ | Same silicon, 0°C to +70°C temperature grade vs. −40°C to +85°C for MAX366ESA+ | Limited to commercial-temperature environments; unsuitable for industrial enclosures with wide ambient swings | Select MAX366CSA+ only for cost-sensitive, non-industrial applications with guaranteed ambient ≤70°C |
| MAX367ESA+ | Eight-channel version in 18-pin SO package - same electrical specs per channel, higher channel density | Requires larger PCB area and different layout; suitable only when ≥5 protectors needed per board | Choose MAX367ESA+ to reduce component count in multi-channel DAQ systems - not a drop-in replacement for MAX366ESA+ |
Compared with MAX366CSA+, MAX366ESA+ extends operational reliability across industrial temperature ranges without altering signal-path performance; compared with MAX367ESA+, it offers optimal space efficiency for three-channel protection without over-provisioning or layout redesign.
Availability
MAX366ESA+ is available at Aetrix Electronics and suitable for process control systems, hot-insertion data-acquisition boards, and sensitive instrument front-ends requiring stable component supply across extended temperature cycles and long production lifecycles.
Supply support for MAX366ESA+ 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) designs precision analog, mixed-signal, and power-management ICs for industrial, medical, and communications applications - emphasizing robustness, integration, and specification rigor.
The MAX366/MAX367 family was engineered specifically for fault-tolerant analog signal routing in modular, high-reliability systems - delivering rail-referenced, zero-control protection without degrading bandwidth or DC accuracy.
FAQ
What is the maximum continuous fault voltage the MAX366ESA+ can withstand?
The MAX366ESA+ withstands up to ±40V fault voltage relative to the opposite supply rail - for example, +35V input with ±5V supplies, or ±25V with ±15V supplies. With V+ = V− = 0V (power off), the absolute maximum is ±40V applied to any signal terminal, with output held at 0V. This rating is defined in Absolute Maximum Ratings and validated across temperature for MAX366ESA+.
Does the MAX366ESA+ require external biasing or control signals to operate?
No. The MAX366ESA+ operates autonomously using only its V+ and V− supply connections. There are no enable pins, configuration registers, or external timing components. Protection activates automatically when signal voltage approaches within ~1.5V of either supply rail - a behavior intrinsic to the internal FET array structure of the MAX366ESA+.
Can the input and output terminals of the MAX366ESA+ be swapped in PCB layout?
Yes. All six signal terminals (Pins 1–3 and 5–7) of the MAX366ESA+ are functionally identical and fully interchangeable - the device is electrically symmetrical. This allows flexible routing where IN1/OUT1, IN2/OUT2, and IN3/OUT3 may be assigned arbitrarily, reducing layer count and via usage in dense analog layouts containing the MAX366ESA+.
What is the typical on-resistance of the MAX366ESA+ and how does it vary with supply voltage?
The MAX366ESA+ exhibits ≤100Ω on-resistance at ±10V supplies and +25°C. Resistance decreases with higher supply voltages (e.g., ~70Ω at ±15V) and increases at lower rails (e.g., ~150Ω at ±5V), as confirmed in Typical Operating Characteristics curves. This variation is inherent to the FET channel enhancement mechanism and is fully characterized for the MAX366ESA+ across its rated supply range.
How does the MAX366ESA+ behave when power is removed from the system?
When V+ and V− are both at 0V, the MAX366ESA+ enters a high-impedance open-circuit state (>100MΩ) between all signal terminals - effectively isolating protected circuitry. No fault current flows, and the output remains floating (not clamped). This zero-power isolation is a core feature of the MAX366ESA+ and enables safe hot-swap and maintenance scenarios without risk of backfeeding.
MAX366ESA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Voltage - Clamping:
- ±40V
- Technology:
- Mixed Technology
- Number of Circuits:
- 3
- Applications:
- General Purpose
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX366ESA+ FAQ
1.How can I place an order for MAX366ESA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX366ESA+ 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 MAX366ESA+ reliable?
The price and inventory of MAX366ESA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX366ESA+ is usually 5 days.
3.What payment methods are accepted for MAX366ESA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX366ESA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX366ESA+?
MAX366ESA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX366ESA+ 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 MAX366ESA+?
For technical support, including MAX366ESA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX366ESA+ requirements.
6.How does Aetrix verify that MAX366ESA+ is sourced from the original manufacturer or authorized distributors?
All MAX366ESA+ 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 MAX366ESA+ meets industry standards.
7.What is the process for return or replacement of MAX366ESA+?
All MAX366ESA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX366ESA+, 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 MAX366ESA+ part is unused and in its original packaging.
Return procedure for MAX366ESA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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