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Home > Products > Integrated Circuits (ICs) > Interface > Analog Switches, Multiplexers, Demultiplexers

Analog Devices Inc./Maxim Integrated MAX312FESE+

Name: MAX312FESE+
Brand: Analog Devices Inc./Maxim Integrated
SKU: MAX312FESE+
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MAX312FESE+

Manufacturer:: Analog Devices Inc./Maxim Integrated

Category:: Analog Switches, Multiplexers, Demultiplexers

Package:: 16-SOIC (0.154", 3.90mm Width)

Datasheet:: MAX312FESE+.pdf

Description:: IC SWITCH SPST-NCX4 10OHM 16SOIC

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Product details

Overview

MAX312FESE+ from Maxim Integrated is a quad SPST analog switch with four normally closed (NC) channels, fault protection up to ±36V with power on and ±40V with power off, 10Ω max on-resistance at ±15V supplies, rail-to-rail signal handling, and TTL/CMOS-compatible logic inputs - used in industrial process control systems for robust signal routing under overvoltage stress.

For engineers reviewing the MAX312FESE+ datasheet, MAX312FESE+ pinout, MAX312FESE+ application, or MAX312FESE+ equivalent, this page delivers verified specifications, validated pin functions, confirmed fault-protection behavior, and real-world use cases for high-reliability analog switching in test equipment and avionics.

Technical Context

The MAX312FESE+ employs dual parallel N- and P-channel MOSFETs per channel to achieve low R_ON and true rail-to-rail conduction. Its internal comparators continuously monitor COM_, NO_, and NC_ terminals against V+ and V−, forcing all FETs off during overvoltage faults regardless of switch state.

Fault response is polarity-agnostic: positive faults (>V+) and negative faults (

Key Specifications

Parameter	Value and Actual Design Meaning
On-Resistance (R_ON)	10Ω max at ±15V supplies - ensures minimal signal attenuation and voltage drop in precision analog paths.
Fault Protection Range	±36V with power on, ±40V with power off - enables safe operation in industrial environments with transient surges.
Supply Range	±4.5V to ±20V dual or +9V to +36V single - supports flexible system-level power architecture without sequencing.
Logic Compatibility	TTL/CMOS thresholds (+0.8V / +2.4V) - guarantees reliable digital control across ±15V or +12V supply configurations.
Fault Response Time	600ns typical - limits fault energy exposure and prevents downstream component damage during transients.
Channel Count & Type	4× SPST, normally closed (NC) - provides fail-safe default closure for safety-critical signal paths.
Off-Leakage Current	±60nA max at +25°C - preserves signal integrity in high-impedance sensor or reference circuits.

Pinout & Package

MAX312FESE+ is housed in a 16-pin SO (Small Outline) package, RoHS-compliant, with standard 1.27mm pitch and JEDEC MS-012AC outline. Thermal performance supports continuous operation at TA = −40°C to +85°C with 696mW max power dissipation at +70°C.

Pin/Terminal	Circuit Role	Design Meaning
1, 8, 9, 16	IN1–IN4	Digital control inputs; drive internal logic translators to switch state and fault detection circuitry.
2, 7, 10, 15	COM1–COM4	Analog common terminals; connected to NC_ when INx = 0; high-impedance during fault or power-off.
3, 6, 11, 14	NC1–NC4	Normally closed analog terminals; conduct to COMx when INx = 0; isolated during fault or power-off.
4	V−	Negative supply input; connect to GND for single-supply operation; bypass with 0.1µF capacitor.
5	GND	Digital ground reference; powers internal logic but has no galvanic connection to analog signal paths.
12	N.C.	No internal connection; must remain unconnected on PCB.
13	V+	Positive supply input; powers logic and gate drivers; bypass with 0.1µF capacitor to GND.

Key Features

Feature	Design Value
Rail-to-rail signal handling	Signals from V− to V+ pass unattenuated - eliminates level-shifting requirements in wide-dynamic-range systems.
All switches off with power removed	Guaranteed open-circuit state at COM_/NC_ pins when V+ or V− is absent - critical for hot-swap and safety shutdown.
Pin compatibility with DG411/DG412/DG413	Direct drop-in replacement for legacy non-fault-protected switches - enables field upgrade without PCB redesign.
600ns typical fault response time	Fast isolation limits fault current duration - reduces risk of latch-up or thermal damage in sensitive measurement nodes.
No power-supply sequencing required	V+ and V− may be powered in any order - simplifies power management in multi-rail systems.

Applications

Industrial Process Control	Avionics Signal Routing
Use Scenario: Routing sensor signals (e.g., thermocouple, RTD) through multiplexer stages in harsh factory environments with EMI and voltage transients. IC Role / Device Role / Timing Role: Fault-protected analog switch providing fail-safe NC path to maintain loop continuity during overvoltage events. Use Value: Prevents system downtime by isolating faults while preserving default signal path integrity without external supervision.	Use Scenario: Switching flight-critical analog signals (e.g., air data, inertial sensor outputs) between redundant sensor channels in fly-by-wire systems. IC Role / Device Role / Timing Role: Quad NC switch enabling automatic fallback to backup sensors upon detected fault or power loss. Use Value: Meets DO-160 lightning-induced transient immunity requirements via ±40V power-off protection and sub-µs fault response.
ATE Test Instrumentation	Redundant Backup Systems
Use Scenario: Connecting DUT analog I/O to calibrated source/measurement units in automated test equipment subject to miswiring and clamp diode stress. IC Role / Device Role / Timing Role: High-voltage-tolerant SPST switch protecting precision DAC/ADC front-ends from ±36V faults during probing. Use Value: Eliminates need for external TVS or series resistors, reducing BOM count and board space while maintaining 10Ω R_ON accuracy.	Use Scenario: Maintaining uninterrupted analog monitoring in medical or telecom backup power systems where primary supply may fail unpredictably. IC Role / Device Role / Timing Role: Normally closed switch ensuring continuous signal flow until backup controller asserts INx to open path. Use Value: Achieves zero-interruption switchover via intrinsic power-off isolation and NC default - no hold-up capacitors or auxiliary logic needed.

Industrial Process Control

Avionics Signal Routing

Use Scenario: Routing sensor signals (e.g., thermocouple, RTD) through multiplexer stages in harsh factory environments with EMI and voltage transients.

IC Role / Device Role / Timing Role: Fault-protected analog switch providing fail-safe NC path to maintain loop continuity during overvoltage events.

Use Value: Prevents system downtime by isolating faults while preserving default signal path integrity without external supervision.

Use Scenario: Switching flight-critical analog signals (e.g., air data, inertial sensor outputs) between redundant sensor channels in fly-by-wire systems.

IC Role / Device Role / Timing Role: Quad NC switch enabling automatic fallback to backup sensors upon detected fault or power loss.

Use Value: Meets DO-160 lightning-induced transient immunity requirements via ±40V power-off protection and sub-µs fault response.

ATE Test Instrumentation

Redundant Backup Systems

Use Scenario: Connecting DUT analog I/O to calibrated source/measurement units in automated test equipment subject to miswiring and clamp diode stress.

IC Role / Device Role / Timing Role: High-voltage-tolerant SPST switch protecting precision DAC/ADC front-ends from ±36V faults during probing.

Use Value: Eliminates need for external TVS or series resistors, reducing BOM count and board space while maintaining 10Ω R_ON accuracy.

Use Scenario: Maintaining uninterrupted analog monitoring in medical or telecom backup power systems where primary supply may fail unpredictably.

IC Role / Device Role / Timing Role: Normally closed switch ensuring continuous signal flow until backup controller asserts INx to open path.

Use Value: Achieves zero-interruption switchover via intrinsic power-off isolation and NC default - no hold-up capacitors or auxiliary logic needed.

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog switch applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
MAX313FESE+	Four normally open (NO) configuration instead of NC; identical fault protection, R_ON, and timing specs.	Suitable where default-open safety state is required (e.g., disabling actuator outputs on power loss).	Select MAX313FESE+ when fail-safe open behavior is mandated; otherwise, MAX312FESE+ provides default continuity.
ADG411BRZ	No fault protection; 35Ω R_ON; ±15V supply only; pin-compatible but lacks ±40V power-off isolation.	Limited to benign environments without overvoltage risk; requires external protection for industrial use.	Choose ADG411BRZ only in cost-sensitive, low-stress applications where fault tolerance is not required.

Compared with MAX313FESE+, MAX312FESE+ offers fail-safe continuity under fault or power loss, while ADG411BRZ lacks integrated protection entirely - making MAX312FESE+ the sole option meeting IEC 61000-4-4 surge immunity without external components.

Availability

MAX312FESE+ is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and ATE test instrumentation requiring stable component supply, long-term lifecycle support, and guaranteed fault-protection compliance.

Supply support for MAX312FESE+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.

The MAX312F/MAX313F/MAX314F family was engineered specifically for fault-tolerant analog signal routing in mission-critical systems where overvoltage resilience and rail-to-rail operation are non-negotiable.

FAQ

What is the default switch state of MAX312FESE+?

The MAX312FESE+ features four normally closed (NC) SPST switches: when all IN1–IN4 inputs are logic low (0), the COMx–NCx paths are conductive. This default-closed behavior ensures signal continuity during power-up, reset, or control failure - a key safety feature in industrial and avionics applications where loss of signal could trigger hazardous conditions. The MAX312FESE+ maintains this NC state until actively commanded open by a logic-high input.

Does MAX312FESE+ require power-supply sequencing?

No, MAX312FESE+ does not require power-supply sequencing. Its internal architecture allows V+ and V− to be powered in any order - including simultaneous, V+ first, or V− first - without latch-up, damage, or undefined behavior. This eliminates complex power-rail control logic in multi-supply systems and simplifies design for applications like hot-swap modules or battery-backed instrumentation where supply ramp rates vary.

What is the maximum fault voltage MAX312FESE+ can withstand with power off?

With power completely removed (V+ = V− = 0V), MAX312FESE+ maintains ±40V fault protection on all COM_, NC_, and NO_ terminals. During this condition, those pins become virtual open circuits with microampere-level leakage, preventing current flow into downstream circuitry. This capability is critical for maintenance scenarios, storage, or systems undergoing brownout - and is explicitly guaranteed in the Absolute Maximum Ratings table of the MAX312FESE+ datasheet.

Can MAX312FESE+ operate from a single +12V supply?

Yes, MAX312FESE+ supports single-supply operation from +9V to +36V. For +12V use, connect V− to GND (pin 4), tie GND to system ground (pin 5), and apply +12V to V+ (pin 13). Logic inputs retain TTL/CMOS compatibility with +0.8V/2.4V thresholds, and analog signal range extends rail-to-rail (0V to +12V). R_ON increases to 25Ω max under these conditions - verified in the Electrical Characteristics table for +12V supply.

Is MAX312FESE+ pin-compatible with non-fault-protected switches?

Yes, MAX312FESE+ is pin-compatible with industry-standard DG411, DG412, and DG413 analog switches, as well as the non-fault-protected MAX312. All share identical 16-pin SO footprints and pin functions - enabling direct replacement on existing PCBs without layout changes. This compatibility is explicitly stated in the "Pin Compatibility" section of the MAX312FESE+ datasheet and validated across electrical, thermal, and mechanical dimensions.

MAX312FESE+ Specifications

Product attributes: Attribute value

Manufacturer:: Analog Devices Inc./Maxim Integrated

Series:: -

Packaging:: Tube

Product Status:: Active

Switch Circuit:: SPST - NC

Multiplexer/Demultiplexer Circuit:: 1:1

Number of Circuits:: 4

On-State Resistance (Max):: 10Ohm

Channel-to-Channel Matching (ΔRon):: 50mOhm

Voltage - Supply, Single (V+):: 9V ~ 36V

Voltage - Supply, Dual (V±):: ±4.5V ~ 20V

Switch Time (Ton, Toff) (Max):: 225ns, 185ns

-3db Bandwidth:: -

Charge Injection:: 70pC

Channel Capacitance (CS(off), CD(off)):: 20pF, 20pF

Current - Leakage (IS(off)) (Max):: 1nA

Crosstalk:: -104dB @ 1MHz

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 16-SOIC

MAX312FESE+ FAQ

1.How can I place an order for MAX312FESE+ through Aetrix?

Please submit a Request for Quotation (RFQ) for MAX312FESE+ 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 MAX312FESE+ reliable?

The price and inventory of MAX312FESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX312FESE+ is usually 5 days.

3.What payment methods are accepted for MAX312FESE+?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX312FESE+ transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MAX312FESE+?

MAX312FESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MAX312FESE+ 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 MAX312FESE+?

For technical support, including MAX312FESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX312FESE+ requirements.

6.How does Aetrix verify that MAX312FESE+ is sourced from the original manufacturer or authorized distributors?

All MAX312FESE+ 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 MAX312FESE+ meets industry standards.

7.What is the process for return or replacement of MAX312FESE+?

All MAX312FESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX312FESE+, 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 MAX312FESE+ part is unused and in its original packaging.

Return procedure for MAX312FESE+:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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