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Analog Devices Inc./Maxim Integrated MAX4535EUD
- Part No.:
- MAX4535EUD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4535EUD.pdf
- Description:
- IC SW DPST-NOX2 400OHM 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,961
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Product details
Overview
The MAX4535EUD from Maxim Integrated is a dual 2-to-1 fault-protected analog multiplexer IC designed for high-voltage signal routing in harsh environments. It operates from ±4.5V to ±20V dual supplies or +9V to +36V single supply, delivers ≤400Ω on-resistance, ±40V fault protection with supplies off, and 20ns typical fault response time. It is used in avionics data acquisition systems where rail-to-rail signal integrity and overvoltage resilience are critical.
For engineers reviewing the MAX4535EUD datasheet, MAX4535EUD pinout, MAX4535EUD application, or MAX4535EUD equivalent, key selection criteria include its dual-channel 2:1 switching architecture, fault-clamped COM outputs, TTL/CMOS-compatible logic inputs at +12V or ±15V, and guaranteed -40°C to +85°C operation in TSSOP packaging.
Technical Context
The MAX4535EUD implements two independent 2-to-1 analog switches using parallel N- and P-channel FETs per channel, enabling rail-to-rail signal handling and low on-resistance matching (≤10Ω). Each NOx input is fault-protected with internal comparators that detect >±150mV rail excursion and disable the switch while clamping COM to V+ or V− via booster FETs.
Fault recovery is asymmetric: positive faults recover in 2.5µs, negative faults in 1.3µs. The device requires no power-supply sequencing, remains fully off with supplies removed, and supports break-before-make timing (100ns typ) to prevent signal shorting during channel transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - enables compatibility with industrial ±15V and avionics +28V systems |
| On-Resistance (max) | 400Ω - ensures minimal signal attenuation and voltage drop across switched paths |
| Fault Protection (supplies off) | ±40V on NO pins - protects against catastrophic input faults during system power-down or maintenance |
| Fault Response Time (typ) | 20ns - limits transient energy injection into downstream circuitry during overvoltage events |
| Logic Compatibility | TTL/CMOS thresholds (0.8V low / 2.4V high) - allows direct interfacing with microcontrollers and FPGAs without level-shifting |
| Operating Temperature | -40°C to +85°C - qualified for extended industrial and avionics environmental stress profiles |
| Channel Configuration | Dual 2-to-1 - provides independent A/B signal selection per channel for redundant or differential routing |
Pinout & Package
MAX4535EUD is housed in a 14-pin TSSOP package (JEDEC MO-153, 5.0mm × 4.4mm × 1.2mm), lead-free and RoHS-compliant, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | A0 address input | Selects between NO1A/NO2A (Pin 1) or NO1B/NO2B (Pin 14); TTL/CMOS compatible |
| 2 | EN enable input | Active-high control: drives both channels ON/OFF simultaneously; 0.8V/2.4V thresholds |
| 3 | V− | Negative supply rail; supports bipolar operation down to −4.5V; must be decoupled locally |
| 4, 5 | NO1A, NO2A | Fault-protected analog inputs for Channel A; withstand ±40V with supplies off |
| 7, 8 | COMA, COMB | Analog outputs; clamped to V+ or V− during fault; not fault-protected - must stay within rails |
| 10, 11 | NO1B, NO2B | Fault-protected analog inputs for Channel B; identical specs to NO1A/NO2A |
| 12 | V+ | Positive supply rail; supports up to +36V single or +20V dual; requires local decoupling |
| 13 | GND | Digital/analog reference ground; ESD diodes connect to V+/V−; no analog signal path tie |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Passes signals from V− to V+ without clipping - essential for full-scale sensor or DAC output routing |
| Output clamping during fault | COMA/COMB actively clamped to V+ or V− when NOx exceeds rails - prevents downstream component damage |
| No supply sequencing required | V+, V−, and logic can be powered in any order - simplifies power management in multi-rail systems |
| All channels off with supplies off | NOx pins become virtual open-circuit; COM outputs float safely - eliminates leakage paths during standby |
| Matched on-resistance (≤10Ω) | Minimizes gain error in precision instrumentation or calibration paths where channel consistency is critical |
Applications
| Avionics Sensor Multiplexing | Industrial Redundant I/O |
|---|---|
|
Use Scenario: Routing multiple engine temperature and pressure sensor outputs to a single ADC in flight control units. IC Role / Device Role / Timing Role: Dual 2-to-1 analog switch selecting between primary and backup sensor pairs per channel. Use Value: Fault clamping prevents ±40V transients from lightning-induced coupling from damaging the ADC front-end during flight. |
Use Scenario: Switching between main and backup PLC analog input modules in oil refinery control cabinets. IC Role / Device Role / Timing Role: Isolating and selecting active signal paths while maintaining galvanic separation between redundant channels. Use Value: Break-before-make timing avoids momentary shorts during switchover; -40°C to +85°C rating ensures reliability in unconditioned enclosures. |
| High-Voltage Data Acquisition | Test Equipment Signal Routing |
|
Use Scenario: Conditioning and routing ±10V industrial process signals (4–20mA loop receivers, strain gauges) into DAQ systems. IC Role / Device Role / Timing Role: High-voltage analog multiplexer enabling flexible channel assignment without external protection circuitry. Use Value: 400Ω on-resistance and matched channels preserve signal fidelity; ±25V fault protection with ±15V supplies covers worst-case field wiring faults. |
Use Scenario: Automated test equipment (ATE) switching between DUT signal sources and measurement instruments under program control. IC Role / Device Role / Timing Role: Precision analog switch providing fast, repeatable channel selection with sub-20ns fault detection. Use Value: 20ns fault response time prevents transient propagation during probe contact bounce or relay chatter in high-speed test sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-1 fault-protected multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG508FBRUZ | Single 8-to-1 configuration; ±15V max supply; 450Ω RON; ±40V fault protection only with supplies on | Higher channel count but lacks dual independent 2:1 topology; no rail-to-rail signal pass-through | Choose when consolidating >2 inputs per path is needed, but verify fault behavior during power-off states. |
| TMUX6219RTER | Single 2-to-1; +4.5V to +36V single supply only; 3.5Ω RON; ±60V fault protection; no dual-channel variant | Lower on-resistance and higher fault voltage, but no native dual-channel package or dual-supply support | Prefer for ultra-low-loss single-path designs with strict single-supply constraints; requires two devices for dual functionality. |
Compared with ADG508FBRUZ and TMUX6219RTER, the MAX4535EUD uniquely delivers dual independent 2:1 switching, true rail-to-rail signal handling, and guaranteed ±40V fault tolerance with supplies off - making it optimal for space-constrained, safety-critical dual-redundant routing.
Availability
MAX4535EUD is available at Aetrix Electronics and suitable for avionics sensor multiplexing, industrial redundant I/O, and high-voltage data-acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4535EUD 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 demanding industrial, automotive, and communications applications.
The MAX4535EUD belongs to Maxim's fault-protected analog switch family, engineered specifically for signal routing in environments subject to electrical overstress, such as aerospace, process control, and test equipment.
FAQ
What is the maximum fault voltage the MAX4535EUD can withstand with power supplies disconnected?
The MAX4535EUD guarantees ±40V fault protection on all NOx pins (NO1A, NO2A, NO1B, NO2B) when V+ and V− are at 0V. This allows safe connection to live field wiring during system maintenance or brownout conditions without risk of latch-up or permanent damage. The device enters high-impedance state on NOx pins and isolates the COM outputs completely. MAX4535EUD maintains this protection across its full -40°C to +85°C operating range.
Does the MAX4535EUD support rail-to-rail input signals when powered from ±15V supplies?
Yes, the MAX4535EUD supports true rail-to-rail analog signal handling from V− to V+ under ±15V operation. Signals ranging from -15V to +15V pass through the switch with minimal distortion or clipping, enabled by its parallel N/P-FET architecture. This capability is confirmed in the Typical Operating Characteristics plots (Figure toc01/toc03) and is intrinsic to the device's design - not dependent on external biasing. MAX4535EUD maintains this performance across temperature and supply voltage variations.
How does the MAX4535EUD behave during a positive overvoltage fault on NO1A?
When NO1A exceeds V+ by ~150mV, the internal positive fault comparator triggers, turning off both N1 and P1 FETs in that channel. If the switch is ON, P2 activates to clamp COMA to V+. If OFF, both NO1A and COMA go high-impedance. Recovery takes ~2.5µs after the fault clears. This behavior is identical for all NOx pins and is validated in Figure toc09 and the Fault Protection section of the MAX4535EUD datasheet.
Can the MAX4535EUD operate from a +24V single supply?
Yes, the MAX4535EUD supports +9V to +36V single-supply operation with V− tied to GND. At +24V, it delivers ≤400Ω on-resistance, maintains TTL/CMOS logic compatibility (0.8V/2.4V thresholds), and retains ±25V fault protection on NOx pins. Electrical characteristics including leakage, switching speed, and charge injection remain within spec - confirmed in the Single +12V Supply tables (pages 4–5) and extended to +24V via supply voltage curves (toc07/toc08).
Why are COMA and COMB not fault-protected in the MAX4535EUD?
COMA and COMB lack internal fault-protection circuitry because they serve as output nodes - clamping occurs *at* these pins during faults (to V+ or V−), not *on* them. Applying overvoltage directly to COM violates Absolute Maximum Ratings (VCOM_ must stay between V− and V+), risking ESD diode conduction and permanent damage. This design choice prioritizes fast, controlled clamping over bidirectional protection. MAX4535EUD datasheet Section "Non-Fault-Protected Pins" explicitly warns against exceeding rail limits on COM pins.
MAX4535EUD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- DPST - NO
- Multiplexer/Demultiplexer Circuit:
- 2:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 400Ohm
- Channel-to-Channel Matching (ΔRon):
- 2Ohm
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 275ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 5pF, 4pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -53dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX4535EUD FAQ
1.How can I place an order for MAX4535EUD through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4535EUD 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 MAX4535EUD reliable?
The price and inventory of MAX4535EUD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4535EUD is usually 5 days.
3.What payment methods are accepted for MAX4535EUD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4535EUD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4535EUD?
MAX4535EUD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4535EUD 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 MAX4535EUD?
For technical support, including MAX4535EUD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4535EUD requirements.
6.How does Aetrix verify that MAX4535EUD is sourced from the original manufacturer or authorized distributors?
All MAX4535EUD 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 MAX4535EUD meets industry standards.
7.What is the process for return or replacement of MAX4535EUD?
All MAX4535EUD units undergo pre-shipment inspection (PSI). If there is an issue with MAX4535EUD, 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 MAX4535EUD part is unused and in its original packaging.
Return procedure for MAX4535EUD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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