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Analog Devices Inc./Maxim Integrated MAX4535CUD+
- Part No.:
- MAX4535CUD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MAX4535CUD+.pdf
- Description:
- IC SW DPST-NOX2 400OHM 14TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,465
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Product details
Overview
MAX4535CUD+ 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, ±40V fault protection with supplies off, and rail-to-rail signal handling - used in industrial data-acquisition systems requiring robust signal routing under overvoltage stress.
For engineers reviewing the MAX4535CUD+ datasheet, MAX4535CUD+ pinout, MAX4535CUD+ application, or MAX4535CUD+ equivalent, this page delivers verified electrical specs, fault-protection behavior, TSSOP-14 package details, and real-world selection guidance for high-voltage multiplexer replacement or design-in.
Technical Context
The MAX4535CUD+ implements dual independent 2-to-1 multiplexers using parallel N- and P-channel FETs per channel, enabling low on-resistance and true rail-to-rail analog signal pass-through. Fault detection uses dedicated comparators that clamp COM outputs to V+ or V− within 20ns when NO inputs exceed rails by ~150mV.
During fault conditions, NO pins become high-impedance regardless of enable or address state; COM outputs are actively clamped via booster FETs sourcing/sinking up to ±10mA. Non-fault-protected pins (A0, EN, COMA, COMB, GND) require voltage limiting to supply rails to avoid ESD diode conduction.
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 power architectures without external regulation. |
| On-Resistance | 400Ω max - ensures minimal signal attenuation and gain error in precision sensor or DAC output routing. |
| Fault Protection | ±40V with supplies off, ±25V with ±15V supplies - protects downstream circuitry during system power loss or transient overvoltage events. |
| Fault Response Time | 20ns typ - limits fault energy injection into sensitive analog front-ends before clamping activates. |
| Rail-to-Rail Signal Range | V− to V+ - enables full utilization of ADC input range or op-amp output swing without level-shifting. |
| Logic Compatibility | TTL/CMOS thresholds at +12V or ±15V supplies - simplifies interface with microcontrollers and FPGA I/O without level translators. |
| Charge Injection | ±62pC max - minimizes voltage glitch on sampled-hold nodes in data-acquisition systems. |
Pinout & Package
MAX4535CUD+ is housed in a 14-pin TSSOP package (4.4mm × 5mm, 0.65mm pitch), RoHS-compliant, with exposed pad for thermal enhancement. Pin 1 is A0; pin 13 is GND; pin 12 is V+; pin 3 is V−; pins 4/5/10/11 are fault-protected NO inputs; pins 7/8 are COM outputs; pin 2 is EN; pins 6/9/14 are NC.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 (Pin 1) | Address bit 0 | Selects between NO1A/NO2A (COMA) or NO1B/NO2B (COMB); TTL/CMOS-compatible logic input. |
| EN (Pin 2) | Enable input | Active-high control: all channels disabled when low; no power sequencing required for safe startup. |
| V− (Pin 3) | Negative supply | Reference for negative rail operation; must be ≥ −44V and ≤ +0.3V relative to GND. |
| NO1A (Pin 4) | Fault-protected channel input A | Withstands ±40V faults when powered off; clamps COMA to V− if driven below V− by >150mV. |
| NO2A (Pin 5) | Fault-protected channel input A | Matches NO1A in on-resistance (≤10Ω difference) and leakage; enables matched signal paths. |
| N.C. (Pin 6) | No connection | Internally unconnected; must remain floating or grounded per PCB layout best practices. |
| COMA (Pin 7) | Analog output A | Not fault-protected; voltage must stay within V− to V+ to prevent ESD diode conduction and damage. |
| COMB (Pin 8) | Analog output B | Independent of COMA; shares same fault-protection architecture but separate internal FET paths. |
| N.C. (Pin 9) | No connection | Internally unconnected; no routing or stitching required. |
| NO2B (Pin 10) | Fault-protected channel input B | Paired with NO1B for COMB path; identical fault response and leakage specs as NO1A/NO2A. |
| NO1B (Pin 11) | Fault-protected channel input B | Enables dual independent 2:1 mux operation; supports redundant signal routing in safety-critical systems. |
| V+ (Pin 12) | Positive supply | Reference for positive rail operation; must be ≤ +44V and ≥ −0.3V relative to GND. |
| GND (Pin 13) | Ground reference | Logic and ESD protection reference; isolated from analog signal paths except through internal diodes. |
| N.C. (Pin 14) | No connection | Internally unconnected; leave unpopulated or tie to GND only if required for mechanical stability. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail signal handling | Supports analog signals from V− to V+ without clipping - critical for full-scale sensor or actuator interfacing. |
| ±40V fault protection with supplies off | Prevents latch-up or permanent damage during system power-down while field inputs remain live. |
| Break-before-make switching | 200ns min tBBM ensures no momentary short between NO inputs - avoids signal corruption in mixed-source routing. |
| Matched on-resistance (≤10Ω) | Minimizes gain mismatch in differential or ratiometric measurement paths across both mux channels. |
| 20ns fault response time | Reduces fault-induced transient energy delivered to downstream amplifiers or ADC drivers. |
| TTL/CMOS logic compatibility | Eliminates need for external level shifters when interfacing with 3.3V/5V microcontrollers or CPLDs. |
Applications
| Industrial Data-Acquisition Systems | Avionics Signal Routing |
|---|---|
|
Use Scenario: Multiplexing multiple high-voltage sensor outputs (e.g., strain gauges, RTDs) into a shared precision ADC under varying ground potentials. IC Role / Device Role / Timing Role: Dual 2-to-1 analog switch providing fault-isolated signal selection with rail-to-rail input range and fast fault shutdown. Use Value: Prevents ADC saturation or damage during sensor cable disconnect transients or lightning-induced surges up to ±40V. |
Use Scenario: Redundant flight-control signal routing where primary and backup analog signals must be selected without cross-talk or fault propagation. IC Role / Device Role / Timing Role: Independent dual mux enabling simultaneous monitoring of two signal paths with automatic fault isolation on either channel. Use Value: Ensures fail-safe operation: a ±25V fault on NO1B disables only COMB path, leaving COMA fully functional. |
| Process Control Loop Monitoring | High-Voltage Test Equipment |
|
Use Scenario: Switching between process variable transmitters (4–20mA loop-powered) and calibration references in PLC I/O modules. IC Role / Device Role / Timing Role: Fault-protected analog switch handling loop-powered signals referenced to non-ground potentials up to ±10V. Use Value: Supports safe hot-swap of field devices: NO inputs tolerate VNO − VCOM up to ±40V, preventing damage during insertion. |
Use Scenario: Automated test fixture selecting between DUT outputs and reference standards under ±30V bias conditions. IC Role / Device Role / Timing Role: High-voltage multiplexer enabling programmable signal path configuration with guaranteed fault containment. Use Value: Eliminates manual re-wiring; ±40V fault tolerance allows testing of failed units without risking test-system integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-1 analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG1419BRUZ | Single 2-to-1, ±15V max supply, 4.7Ω on-resistance, no fault protection | Lacks ±40V fault tolerance and rail-to-rail operation beyond ±15V; requires external clamping for high-voltage environments | Choose ADG1419BRUZ only for low-voltage, space-constrained designs where fault protection is handled externally. |
| TS5A23159DCKR | Dual 2-to-1, +1.65V to +5.5V supply, 0.9Ω on-resistance, no fault protection | Rated only for low-voltage logic-level signals; incompatible with ±15V or +24V industrial supplies | TS5A23159DCKR suits battery-powered portable instruments but cannot replace MAX4535CUD+ in high-voltage industrial systems. |
Compared with ADG1419BRUZ and TS5A23159DCKR, the MAX4535CUD+ uniquely delivers integrated ±40V fault protection, dual-supply flexibility, and rail-to-rail operation - making it irreplaceable in ungrounded, high-stress analog routing where reliability under fault is non-negotiable.
Availability
MAX4535CUD+ is available at Aetrix Electronics and suitable for industrial data-acquisition systems, avionics signal routing, and process control loop monitoring requiring stable component supply across extended temperature ranges (0°C to +70°C).
Supply support for MAX4535CUD+ 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, automotive, and communications applications.
The MAX4535 series belongs to Maxim's fault-protected analog switch product line, designed specifically for robust signal routing in harsh environments where overvoltage transients, ground differentials, and system-level reliability are critical.
FAQ
What is the maximum fault voltage the MAX4535CUD+ can withstand with power supplies disconnected?
The MAX4535CUD+ withstands ±40V on its NO_ pins (NO1A, NO2A, NO1B, NO2B) when all power supplies are disconnected. This is specified in the Absolute Maximum Ratings table and verified under "Fault Protection" test conditions. The device enters high-impedance mode on NO_ pins during such faults, protecting downstream circuitry without requiring external components. This capability is intrinsic to the MAX4535CUD+ silicon design and applies across its full operating temperature range.
Does the MAX4535CUD+ support single-supply operation, and what is the minimum voltage?
Yes, the MAX4535CUD+ supports single-supply operation from +9V to +36V with V− tied to GND. The minimum valid single-supply voltage is +9V - operation below this level is not characterized or guaranteed. At +12V, key parameters including on-resistance (≤950Ω), leakage current (≤±2nA), and switching times (tON ≤ 250ns) meet datasheet specifications. The MAX4535CUD+ maintains TTL/CMOS logic compatibility across this entire range without external level shifting.
Are the COMA and COMB pins fault-protected on the MAX4535CUD+?
No, the COMA and COMB pins on the MAX4535CUD+ are not fault-protected. As stated in the datasheet's "Non-Fault-Protected Pins" section, only the NO_ pins (NO1A, NO2A, NO1B, NO2B) feature integrated overvoltage protection. Applying voltages outside the V− to V+ range to COMA or COMB will forward-bias internal ESD diodes, potentially causing excessive current flow and permanent damage. Designers must ensure COM outputs are always referenced within the supply rails - for example, using resistive termination or op-amp buffering.
What is the on-resistance matching specification between channels of the MAX4535CUD+?
The MAX4535CUD+ guarantees on-resistance matching of ≤10Ω maximum between any two channels (e.g., NO1A–NO2A or NO1B–NO2B) at TA = +25°C and V+ = +15V/V− = −15V. This value, denoted as ∆RON in the Electrical Characteristics table, reflects the worst-case difference between highest and lowest RON across channels under identical bias conditions. Tight matching ensures minimal gain error in differential or ratiometric measurement configurations where channel-to-channel consistency is essential.
Can the MAX4535CUD+ operate with asymmetric dual supplies, and what is the limit?
Yes, the MAX4535CUD+ supports asymmetric dual supplies - for example, +12V and −5V - as long as the absolute voltage on V+ does not exceed +44V, V− does not go below −44V, and the total differential (V+ − V−) remains ≤ +44V. The datasheet explicitly states "supplies need not be symmetrical." Performance parameters like on-resistance and fault trip threshold scale with actual supply values, and operation is fully specified across the ±4.5V to ±20V range per rail. Asymmetry is commonly used to match sensor output ranges or reduce power dissipation.
MAX4535CUD+ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
MAX4535CUD+ FAQ
1.How can I place an order for MAX4535CUD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4535CUD+ 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 MAX4535CUD+ reliable?
The price and inventory of MAX4535CUD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4535CUD+ is usually 5 days.
3.What payment methods are accepted for MAX4535CUD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4535CUD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4535CUD+?
MAX4535CUD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4535CUD+ 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 MAX4535CUD+?
For technical support, including MAX4535CUD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4535CUD+ requirements.
6.How does Aetrix verify that MAX4535CUD+ is sourced from the original manufacturer or authorized distributors?
All MAX4535CUD+ 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 MAX4535CUD+ meets industry standards.
7.What is the process for return or replacement of MAX4535CUD+?
All MAX4535CUD+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4535CUD+, 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 MAX4535CUD+ part is unused and in its original packaging.
Return procedure for MAX4535CUD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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