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Analog Devices Inc./Maxim Integrated MAX4520EUT+T
- Part No.:
- MAX4520EUT+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- SOT-23-6
- Datasheet:
-
MAX4520EUT+T.pdf
- Description:
- IC SWITCH SPST-NOX1 160OHM SOT6
- Quantity:
- Payment:
- Shipping:
Inventory:14,968
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Product details
Overview
The MAX4520EUT+T from Maxim Integrated is a fault-protected, normally open (NO), single-pole/single-throw (SPST) analog switch designed for high-reliability signal routing in industrial and avionics systems. It supports ±4.5V to ±20V dual supplies or +9V to +36V single supply, delivers rail-to-rail signal handling, features 160Ω max on-resistance at ±15V, and provides ±36V fault protection with power applied and ±40V with power off - used in redundant backup systems where overvoltage resilience is critical.
For engineers reviewing the MAX4520EUT+T datasheet, MAX4520EUT+T pinout, MAX4520EUT+T application, or MAX4520EUT+T equivalent, key selection criteria include fault-protection voltage thresholds, leakage current under temperature extremes, on-resistance vs. signal swing, COM terminal current sourcing/sinking capability during fault, and compatibility with TTL/CMOS logic across supply configurations.
Technical Context
The MAX4520EUT+T employs dual parallel FET architecture (N1 and P1) enabling low on-resistance and true rail-to-rail conduction - unlike traditional triple-FET fault-protected switches. Its internal high- and low-fault comparators monitor NO voltage against V+ and V−, disabling N1/P1 and activating booster FETs (P2/N2) when faults exceed ±36V.
During positive or negative overvoltage, the NO terminal becomes high-impedance while COM is actively clamped to V+ or V− via P2/N2, delivering up to ±13mA to the load without glitch. The device operates with no power-supply sequencing requirement and maintains fault protection even with V+ = V− = 0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance | 160Ω max at ±15V - ensures minimal signal attenuation and distortion in precision analog paths |
| Fault protection range | ±36V with power applied, ±40V with power off - enables safe operation in unregulated or transient-prone environments |
| Off-leakage current | 0.5nA at +25°C, 10nA at +85°C - preserves signal integrity in high-impedance sensor or data-acquisition circuits |
| Logic input thresholds | +0.8V low / +2.4V high - guarantees interoperability with both TTL and CMOS drivers using ±15V or +12V supplies |
| Supply range | ±4.5V to ±20V dual or +9V to +36V single - supports wide-range industrial power architectures without external regulation |
| Charge injection | 1.5pC typical - minimizes voltage glitch on capacitive loads during switching transitions |
| Turn-on/turn-off time | 60ns / 175ns at ±15V - enables reliable switching in medium-speed multiplexing and ATE applications |
Pinout & Package
MAX4520EUT+T is housed in a 6-pin SOT23-6 package with exposed pad (not electrically connected). Pin 1 is V+, Pin 2 is V−, Pin 3 is IN (digital control), Pin 4 is GND, Pin 5 is COM (common terminal), and Pin 6 is NO (normally open analog terminal). No internal connection exists at Pin 6 for MAX4510 variants, but MAX4520 uses it as the active signal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Provides gate drive and logic bias; sets high-threshold level; must be ≥ +4.5V in dual-supply mode |
| V− | Negative supply input | Enables bipolar signal handling; connects to GND for single-supply operation (+9V to +36V) |
| IN | Digital control input | TTL/CMOS-compatible; logic high turns switch ON (connects NO to COM); no pull-up/pull-down required |
| GND | Ground reference | Signal return for logic circuitry only; not tied to analog path - isolates digital noise from sensitive analog signals |
| COM | Analog common terminal | Unprotected output node; carries switched signal; sources/sinks up to ±13mA during fault conditions |
| NO | Fault-protected analog input | Normally open path; withstands ±36V faults with power on; becomes virtual open circuit during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Passes signals from V− to V+ without clipping - essential for full-scale ADC/DAC interfacing |
| Fault-protected NO terminal | Withstands ±36V overvoltage with power applied and ±40V with power removed - eliminates need for external TVS diodes |
| Active clamp output during fault | COM driven to V+ or V− by dedicated booster FETs - ensures deterministic output state and prevents floating nodes |
| No power-supply sequencing required | V+ and V− may be powered in any order - simplifies system-level power management and reduces startup complexity |
| Low power consumption | <2mW typical - enables use in thermally constrained or battery-backed industrial modules |
Applications
| Industrial Process Monitoring | Avionics Sensor Multiplexing |
|---|---|
Use Scenario: Routing multiple RTD or thermocouple inputs to a shared precision ADC in a PLC cabinet exposed to 24VDC transients and ESD events. IC Role / Device Role / Timing Role: Fault-protected SPST switch isolating individual sensor channels; activated per scan cycle to prevent cross-talk and fault propagation. Use Value: Eliminates external protection components while maintaining ±36V fault tolerance and sub-nA leakage - preserving measurement accuracy across temperature ranges. |
Use Scenario: Selecting between primary and backup air-data sensors (pitot/static) in flight control computers where voltage transients from lightning-induced coupling occur. IC Role / Device Role / Timing Role: Redundant-path analog switch enabling fail-safe channel switchover; NO terminal handles ±40V faults with power loss during emergency shutdown. Use Value: Maintains signal continuity during fault onset and recovery with <3.5µs positive-fault recovery - meeting DO-160 Section 22 transient immunity requirements. |
| ATE Channel Protection | Redundant Power-Supply Monitoring |
Use Scenario: Protecting DUT interface pins in automated test equipment during high-voltage parametric testing where accidental overvoltage can damage instrumentation. IC Role / Device Role / Timing Role: Front-end guard switch placed between test head cabling and precision source-measure unit (SMU) inputs. Use Value: Limits fault current to <30mA and clamps COM to safe rails - preventing SMU damage while enabling immediate retest after transient clearance. |
Use Scenario: Monitoring voltage outputs of dual-redundant DC-DC converters feeding safety-critical subsystems, requiring uninterrupted sensing despite converter faults. IC Role / Device Role / Timing Role: Normally open switch enabling monitoring only when upstream converter is verified healthy; NO terminal tolerates reverse polarity or overvoltage events. Use Value: Provides galvanic isolation between converter outputs and monitoring circuitry while sustaining ±36V differential fault margin - ensuring continuous health assessment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fault-protected analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG5412BRUZ | Quad SPST, ±40V fault protection, 12Ω on-resistance, requires external charge pump for rail-to-rail performance | Higher integration density but lacks integrated booster FETs - cannot source/sink 13mA during fault without external circuitry | Select when multi-channel consolidation is prioritized over single-channel fault-current delivery capability |
| TMUX6212RUCR | Single SPST, ±36V fault protection, 3.5Ω on-resistance, 100pF off-capacitance, no active clamp output | Superior bandwidth and lower RON, but COM floats during fault - requires external clamping for deterministic behavior | Select for high-frequency signal routing where fault duration is short and external clamping is acceptable |
Compared with ADG5412BRUZ and TMUX6212RUCR, the MAX4520EUT+T uniquely combines single-channel simplicity, integrated ±13mA fault-current delivery, and guaranteed rail-to-rail operation without auxiliary circuitry - making it optimal for safety-critical, low-component-count designs.
Availability
MAX4520EUT+T is available at Aetrix Electronics and suitable for industrial process-control systems, avionics sensor interfaces, and ATE equipment requiring stable component supply, long-term lifecycle support, and guaranteed fault-protection performance across temperature extremes.
Supply support for MAX4520EUT+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
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 automotive markets.
The MAX4510/MAX4520 product line was engineered specifically for fault-tolerant analog signal routing in harsh environments - emphasizing robust overvoltage resilience, rail-to-rail fidelity, and zero-power fault protection without external components.
FAQ
What is the maximum fault voltage the MAX4520EUT+T can withstand with power removed?
The MAX4520EUT+T withstands ±40V faults on its NO terminal when all supplies (V+, V−, GND) are disconnected. This is enabled by internal high-impedance fault-detection circuitry that isolates the NO node without requiring bias. The specification is validated per Absolute Maximum Ratings table and applies regardless of COM or IN state. MAX4520EUT+T remains undamaged and fully functional after such events if current limits are observed.
Does the MAX4520EUT+T require external components to achieve rail-to-rail operation?
No, the MAX4520EUT+T achieves true rail-to-rail signal conduction intrinsically via its parallel N-channel and P-channel FET architecture - no external charge pumps, level shifters, or bias networks are needed. Signals from V− to V+ pass through the ON switch with ≤160Ω resistance and no clipping. This is confirmed in the Typical Operating Characteristics plots showing RON flat across full VCOM range at ±15V and +12V supplies. MAX4520EUT+T delivers this performance natively.
Can the MAX4520EUT+T operate from a +24V single supply?
Yes, the MAX4520EUT+T supports +9V to +36V single-supply operation by connecting V− to GND. At +24V, on-resistance remains ≤160Ω, fault protection holds at ±36V, and logic thresholds stay within TTL/CMOS compatibility (VIL ≤ 0.8V, VIH ≥ 2.4V). Supply current is <250µA typical. All electrical characteristics in the Single +12V Supply section scale predictably to +24V, as confirmed by Figure 1 and Figure 4 in the datasheet. MAX4520EUT+T is fully specified across this range.
What happens to the COM terminal during a +36V fault on the NO pin?
During a +36V fault on the NO pin, the MAX4520EUT+T disables the main N1/P1 FETs and activates the P2 booster FET, driving COM to V+ (e.g., +15V) and sourcing up to +13mA to the load. This clamping action occurs within nanoseconds and prevents COM from exceeding the positive rail - eliminating glitches and ensuring deterministic output. The behavior is identical for −36V faults (COM sinks to V− via N2). MAX4520EUT+T guarantees this response in both dual- and single-supply modes.
Is the GND pin internally connected to the analog signal path in the MAX4520EUT+T?
No, the GND pin in the MAX4520EUT+T serves only the digital logic and level translators - it has no internal connection to the analog signal path (NO–COM). The analog path consists solely of isolated N1 and P1 FETs whose gates are driven by V+/V− referenced logic. This separation prevents ground-loop coupling and preserves signal integrity. ESD diodes connect GND to V+ and V−, but conduction only occurs if GND exceeds supply rails by >300mV. MAX4520EUT+T maintains analog/digital domain isolation by design.
MAX4520EUT+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 1
- On-State Resistance (Max):
- 160Ohm
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 500ns, 175ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1.5pC
- Channel Capacitance (CS(off), CD(off)):
- 10pF, 5pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-6
MAX4520EUT+T FAQ
1.How can I place an order for MAX4520EUT+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4520EUT+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 MAX4520EUT+T reliable?
The price and inventory of MAX4520EUT+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4520EUT+T is usually 5 days.
3.What payment methods are accepted for MAX4520EUT+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4520EUT+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4520EUT+T?
MAX4520EUT+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4520EUT+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 MAX4520EUT+T?
For technical support, including MAX4520EUT+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4520EUT+T requirements.
6.How does Aetrix verify that MAX4520EUT+T is sourced from the original manufacturer or authorized distributors?
All MAX4520EUT+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 MAX4520EUT+T meets industry standards.
7.What is the process for return or replacement of MAX4520EUT+T?
All MAX4520EUT+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX4520EUT+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 MAX4520EUT+T part is unused and in its original packaging.
Return procedure for MAX4520EUT+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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