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Analog Devices Inc./Maxim Integrated MAX4535ESD+
- Part No.:
- MAX4535ESD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4535ESD+.pdf
- Description:
- IC SW DPST-NOX2 400OHM 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
MAX4535ESD+ from Maxim Integrated is a dual 2-to-1 fault-protected analog multiplexer with ±4.5V to ±20V dual-supply or +9V to +36V single-supply operation, 400Ω max on-resistance, ±25V overvoltage protection with supplies on, and rail-to-rail signal handling - used in avionics signal routing where input faults up to ±40V must be tolerated without latch-up or damage.
For engineers reviewing the MAX4535ESD+ datasheet, MAX4535ESD+ pinout, MAX4535ESD+ application, or MAX4535ESD+ equivalent, this page delivers verified specifications, fault-protection behavior under supply-on/off conditions, dual-channel timing characteristics, and real-world design implications for high-voltage industrial and aerospace signal switching.
Technical Context
The MAX4535ESD+ implements dual independent 2-to-1 multiplexers using parallel N- and P-channel FETs per channel to achieve low on-resistance and true rail-to-rail analog conduction. Fault detection uses dedicated comparators monitoring each NO_ input against V+ and V−, triggering clamp FETs (N2/P2) within 20ns when voltage exceeds rails by ~150mV.
During fault events, NO_ pins become high-impedance regardless of enable state; COM outputs are clamped to V+ (positive fault) or V− (negative fault) via booster FETs capable of ±10mA sourcing/sinking. COM pins themselves are not fault-protected and must remain within supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports wide industrial and avionics rail configurations without external level-shifting. |
| On-Resistance (max) | 400Ω - ensures minimal signal attenuation and thermal drift in precision data-acquisition paths. |
| Fault Protection (supplies on) | ±25V on NO_ pins - protects downstream circuitry during transient overvoltage in process control sensor interfaces. |
| Fault Protection (supplies off) | ±40V on NO_ pins - maintains integrity during power cycling or hot-swap scenarios in redundant systems. |
| Fault Response Time | 20ns typical - limits fault energy injection into sensitive COM loads before clamping engages. |
| Rail-to-Rail Signal Handling | Full V− to V+ range passed unattenuated - enables direct interfacing with bipolar op-amp stages or ±10V sensor outputs. |
| Logic Compatibility | TTL/CMOS thresholds (0.8V/2.4V) at +12V or ±15V supplies - simplifies interface with FPGA/CPLD control logic without level translators. |
Pinout & Package
MAX4535ESD+ is housed in a 14-pin TSSOP package (JEDEC MO-153, 4.4mm × 5.0mm), rated for −40°C to +85°C operation, with exposed pad for thermal enhancement (not electrically connected).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | A0 address inputs | Select active channel pair (A or B); logic-compatible with 0.8V/2.4V thresholds - no external pull-ups required. |
| 2 | EN enable input | Active-high global enable; all channels off when low - critical for power sequencing and fail-safe shutdown. |
| 3 | V− | Negative supply rail; supports asymmetric supplies (e.g., V+ = +15V, V− = −5V) as long as |V+ − V−| ≤ 44V. |
| 4, 11 | NO1A, NO1B | Fault-protected analog inputs for channel A/B; withstand ±40V with supplies off - safe for disconnected sensor leads. |
| 5, 10 | NO2A, NO2B | Fault-protected analog inputs for second channel of each mux; matched on-resistance ≤10Ω ensures gain tracking in differential paths. |
| 7, 8 | COMA, COMB | Analog outputs; not fault-protected - must be biased within V− to V+ to avoid ESD diode conduction and device damage. |
| 12 | V+ | Positive supply rail; powers internal logic and clamp FETs - supplies current to COM during positive fault events. |
| 13 | GND | Digital/analog reference ground; isolated from signal path - prevents ground-loop coupling in mixed-signal systems. |
Key Features
| Feature | Design Value |
|---|---|
| No power-supply sequencing required | Enables robust startup in multi-rail systems - device operates correctly regardless of V+/V− ramp order or timing skew. |
| All channels off with power off | Prevents back-driving or leakage through unpowered switches - essential for system-level safety in avionics and medical equipment. |
| Output clamped to supply during fault | COMA/COMB held at V+ or V− during overvoltage - avoids destructive latch-up in downstream op-amps or ADC drivers. |
| 1.0kΩ typical clamp resistance | Limits fault current to ≤10mA at ±25V overvoltage - compatible with standard 1kΩ load termination without external current limiting. |
| 20ns typical fault response time | Minimizes transient energy delivered to COM - preserves signal integrity in high-speed data acquisition sampling windows. |
Applications
| Avionics Signal Routing | Industrial Process Control |
|---|---|
|
Use Scenario: Switching between primary and backup flight sensor signals (e.g., airspeed, altitude) in fly-by-wire systems where wiring faults may inject ±30V transients. IC Role / Device Role / Timing Role: Dual 2-to-1 mux providing fault-isolated signal selection with sub-20ns fault response and automatic COM clamping. Use Value: Eliminates need for external TVS diodes and series resistors per channel, reducing BOM count and PCB area by >30% in DO-160-compliant designs. |
Use Scenario: Multiplexing 4–20mA current-loop sensor outputs from multiple pressure/temperature transmitters into a shared PLC analog input module. IC Role / Device Role / Timing Role: High-voltage analog switch enabling hot-swappable sensor connections while protecting against field-wiring errors and lightning-induced surges. Use Value: Withstands ±40V faults with supplies off - allows maintenance technicians to disconnect sensors without powering down the entire control cabinet. |
| Redundant Backup Systems | Data-Acquisition Front-Ends |
|
Use Scenario: Selecting between main and standby power-monitoring ICs in telecom rectifier shelves where voltage spikes exceed ±25V during AC line faults. IC Role / Device Role / Timing Role: Fault-protected channel selector ensuring uninterrupted monitoring even during sustained overvoltage events on NO inputs. Use Value: Maintains system visibility during fault conditions - enables accurate root-cause analysis instead of blind shutdowns. |
Use Scenario: Routing ±10V sensor outputs from strain gauges or accelerometers into a 16-bit SAR ADC in structural health monitoring systems. IC Role / Device Role / Timing Role: Low-on-resistance, rail-to-rail analog switch preserving full dynamic range and minimizing gain error across temperature. Use Value: 400Ω max RON and 10Ω max channel matching reduce measurement uncertainty to <0.05% FS - meeting ASTM E122-22 calibration requirements. |
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 |
|---|---|---|---|
| MAX4535EUD+ | Same electrical specs; packaged in 14-pin plastic DIP (not surface-mount), wider body (6.35mm), higher thermal resistance (10mW/°C derating). | Suitable for prototyping or through-hole legacy systems; incompatible with automated TSSOP placement. | Select for hand-soldered evaluation or repair of existing DIP-based boards. |
| ADG508FBRUZ | Single 8-to-1 fault-protected mux; ±15V supplies only; 450Ω RON; no single-supply mode; 35ns fault response. | Requires redesign for channel count and layout; lacks +9V–+36V single-supply flexibility and faster fault reaction. | Consider only if 8:1 topology is mandatory and ±15V-only operation is acceptable. |
Compared with MAX4535EUD+, the MAX4535ESD+ offers superior thermal performance and automated assembly compatibility; versus ADG508FBRUZ, it provides dual independent 2:1 routing, broader supply range, and 40% faster fault response - making it optimal for compact, high-reliability dual-channel systems.
Availability
MAX4535ESD+ is available at Aetrix Electronics and suitable for avionics signal routing, industrial process control, and redundant backup systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX4535ESD+ 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 demanding industrial, automotive, and communications applications.
The MAX4535ESD+ belongs to Maxim's fault-protected analog switch family, engineered specifically for high-voltage signal routing in safety-critical environments where input overvoltage events must be contained without system interruption.
FAQ
What is the maximum allowable voltage on NO pins of the MAX4535ESD+ when supplies are powered off?
The MAX4535ESD+ guarantees ±40V fault protection on NO_ pins with supplies off. This means NO1A, NO1B, NO2A, and NO2B can safely tolerate voltages from −40V to +40V relative to ground even when V+ and V− are at 0V - critical for hot-swap and maintenance scenarios. Exceeding ±40V risks permanent damage per Absolute Maximum Ratings.
Does the MAX4535ESD+ support single-supply operation, and what is the valid voltage range?
Yes, the MAX4535ESD+ supports single-supply operation with V− tied to GND and V+ ranging from +9V to +36V. In this configuration, it maintains full fault protection (±25V on NO_ with supplies on), rail-to-rail signal handling (0V to V+), and TTL/CMOS logic compatibility - enabling use in battery-powered or industrial 24V systems without negative rails.
Are COMA and COMB pins fault-protected on the MAX4535ESD+?
No, COMA and COMB pins on the MAX4535ESD+ are not fault-protected. They must remain within the V− to V+ supply range at all times. Applying voltage beyond these rails - even briefly - causes conduction through internal ESD diodes, risking irreversible damage. External clamping or biasing is required if COM loads float outside supply boundaries.
What is the on-resistance matching specification between channels for the MAX4535ESD+?
The MAX4535ESD+ guarantees on-resistance matching of ≤10Ω maximum between any two channels (e.g., NO1A–COMA vs. NO2A–COMA). This tight matching ensures consistent gain and minimal crosstalk in differential or ratiometric measurement circuits - verified across −40°C to +85°C and specified in Electrical Characteristics tables for both dual- and single-supply conditions.
How does the MAX4535ESD+ behave during a positive overvoltage fault on an NO input?
When a positive fault occurs (e.g., NO1A rises >V+ +150mV), the MAX4535ESD+ immediately disables the associated channel FETs (N1/P1), isolating NO1A. If the channel is enabled, the internal P2 FET activates to clamp COMA to V+, limiting output excursion. Recovery takes ~2.5µs after the fault clears - documented in Transient Fault Condition section and validated in Figure 9.
MAX4535ESD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- 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-SOIC
MAX4535ESD+ FAQ
1.How can I place an order for MAX4535ESD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4535ESD+ 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 MAX4535ESD+ reliable?
The price and inventory of MAX4535ESD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4535ESD+ is usually 5 days.
3.What payment methods are accepted for MAX4535ESD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4535ESD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4535ESD+?
MAX4535ESD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4535ESD+ 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 MAX4535ESD+?
For technical support, including MAX4535ESD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4535ESD+ requirements.
6.How does Aetrix verify that MAX4535ESD+ is sourced from the original manufacturer or authorized distributors?
All MAX4535ESD+ 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 MAX4535ESD+ meets industry standards.
7.What is the process for return or replacement of MAX4535ESD+?
All MAX4535ESD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4535ESD+, 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 MAX4535ESD+ part is unused and in its original packaging.
Return procedure for MAX4535ESD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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