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Analog Devices Inc./Maxim Integrated MAX4631ESE+
- Part No.:
- MAX4631ESE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- -
- Datasheet:
-
MAX4631ESE+.pdf
- Description:
- IC SW DUAL ANLG SPST N/O 16-SOIC
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Inventory:4,044
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Product details
Overview
MAX4631ESE+ from Maxim Integrated is a fault-protected, high-voltage dual SPST analog switch with two normally open (NO) channels. It operates from ±4.5V to ±18V dual supplies or +9V to +36V single supply, delivers 85Ω max on-resistance at +25°C, supports rail-to-rail signal handling up to ±36V fault protection (power-on), and features TTL/CMOS-compatible logic inputs. It is used in industrial data acquisition systems where overvoltage transients threaten downstream circuitry.
For engineers reviewing the MAX4631ESE+ datasheet, MAX4631ESE+ pinout, MAX4631ESE+ application, or MAX4631ESE+ equivalent, key selection criteria include fault-protection voltage limits (±36V with ±15V supplies), dual-supply compatibility, matched on-resistance (≤6Ω between channels), low off-leakage (0.5nA at +25°C), and pin compatibility with DG401/DG403/DG405 for legacy board upgrades.
Technical Context
The MAX4631ESE+ uses a parallel N-channel/P-channel MOSFET architecture with integrated voltage-sensing comparators on each NO terminal. During normal operation, it provides bidirectional rail-to-rail conduction with ≤85Ω on-resistance; during overvoltage faults (>V+ +50mV or No power-supply sequencing is required: all switches remain off during power-up/down, and fault protection remains active even with V+ = V− = 0 (±40V fault tolerance). The device guarantees no transition glitches during fault onset or recovery, and maintains ≤5nA off-leakage at +85°C - critical for precision sensor multiplexing in unattended industrial controllers. MAX4631ESE+ is housed in a 16-pin narrow SO package (SOIC-N16), with 1.27mm pitch and standard JEDEC MS-012AC footprint. Pin 1 is top-left corner (notch-down orientation). Use Scenario: Multiplexing multiple 4–20mA current-loop sensors into a single high-resolution ADC in factory-floor monitoring systems. IC Role / Device Role / Timing Role: Dual SPST analog switch routing sensor outputs while blocking fault transients from shared reference planes. Use Value: ±36V fault protection prevents ADC saturation during 48V field-wiring faults; 0.5nA off-leakage ensures <0.01% gain error in 1MΩ sensor interfaces. Use Scenario: Signal routing in automated test equipment where DUT outputs may exceed supply rails during power-up or failure modes. IC Role / Device Role / Timing Role: High-voltage analog switch isolating DUT under test from measurement circuitry during overvoltage events. Use Value: Fault-clamped COM output maintains known voltage at scope or digitizer input, avoiding false trigger or clipping during transient testing. Use Scenario: Selecting between primary and backup air data sensors (pitot/static) in flight control computers with strict DO-254 reliability requirements. IC Role / Device Role / Timing Role: Fault-tolerant SPST switch enabling fail-safe sensor redundancy management without single-point failure. Use Value: All-switches-off-at-power-loss behavior ensures no unintended signal coupling during cold start; -40°C to +85°C rating meets extended avionics temperature envelope. Use Scenario: Isolating redundant power monitors in railway signaling systems where one channel must remain operational during fault on the other. IC Role / Device Role / Timing Role: Dual independent analog switch providing galvanic isolation between primary and backup voltage sensing paths. Use Value: Independent fault protection per channel prevents cross-contamination; 6Ω on-resistance match ensures identical scaling in dual A/D conversion paths. The following parts are listed as comparable options for similar analog switch applications. Compared with ADG408BRUZ and TS5A3157DCKR, the MAX4631ESE+ uniquely combines dual SPST topology, ±36V fault protection, rail-to-rail operation, and DG401 pin compatibility - making it irreplaceable in industrial and avionics analog front-ends requiring intrinsic overvoltage resilience. MAX4631ESE+ is available at Aetrix Electronics and suitable for industrial process control, avionics sensor conditioning, and ATE equipment requiring stable component supply with guaranteed long-term availability and traceable sourcing. Supply support for MAX4631ESE+ 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. Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power-management ICs for demanding industrial, automotive, and communications applications. The MAX4631 series belongs to Maxim's fault-protected analog switch product line, engineered specifically for high-reliability signal routing in harsh environments where field-induced transients, wiring errors, or power sequencing faults threaten system integrity. The MAX4631ESE+ withstands ±36V on NO1/NO2 pins when powered with ±15V supplies, and ±40V when fully unpowered. Exceeding these limits risks permanent damage. This specification is validated per Absolute Maximum Ratings table in the official datasheet, and applies only to NO/NC pins - COM and IN pins are not fault-protected. No, the MAX4631ESE+ does not require power-supply sequencing. All switches remain in the OFF state until valid logic inputs are applied, regardless of V+ or V− ramp order. This behavior is inherent to its internal power-on reset circuitry and is confirmed in the "Detailed Description" section of the MAX4631ESE+ datasheet. Yes, the MAX4631ESE+ supports single-supply operation from +9V to +36V. When using +12V, connect V− to GND. Logic thresholds remain TTL/CMOS-compatible (0.8V/2.4V), and on-resistance increases slightly versus ±15V operation - 125Ω max at +25°C per Electrical Characteristics table. Yes, the MAX4631ESE+ has identical pinout and footprint to the DG401, including COM, NO, IN, V+, V−, and GND assignments. However, only NO pins are fault-protected - NC pins (unused in MAX4631) and COM/IN pins retain standard CMOS robustness. Board-level validation is recommended before drop-in replacement. The MAX4631ESE+ guarantees ≤6Ω maximum on-resistance mismatch (∆RON) between its two SPST channels at +25°C, measured under VCOM = ±10V and ICOM = 1mA. This tight matching ensures consistent gain and offset performance when routing differential or ratiometric sensor signals.Key Specifications
Parameter Value and Actual Design Meaning On-resistance (max) 85Ω at +25°C - ensures minimal signal attenuation and gain error in 12-bit+ data acquisition paths On-resistance match 6Ω max between channels - enables precise differential signal switching without channel-to-channel gain mismatch Fault protection (power-on) ±36V on NO pins - protects connected ADCs or amplifiers from transient overvoltages in motor control feedback loops Off-leakage current 0.5nA at +25°C - preserves accuracy in high-impedance sensor interfaces (e.g., thermocouples, pH electrodes) Supply range ±4.5V to ±18V dual or +9V to +36V single - supports wide-range industrial power rails without external level-shifting Logic thresholds +0.8V low / +2.4V high - ensures reliable switching with both TTL and CMOS drivers across full temperature range Turn-on/off time 150ns / 400ns (typ) - suitable for multiplexed sampling at up to 2MHz without aperture jitter degradation Pinout & Package
Pin/Terminal Circuit Role Design Meaning 1, 8 COM1, COM2 Analog common terminals - bidirectional signal path endpoints; must be routed with controlled impedance for high-frequency signals 2, 7, 12 N.C. No internal connection - leave unconnected; no thermal or EMI impact if grounded or floating 3, 6 NO1, NO2 Fault-protected normally open terminals - only pins rated for ±36V overvoltage (with ±15V supplies); connect to field-side sensors or actuators 4, 5 NC1, NC2 Not applicable - MAX4631 has SPST topology; these pins are unused and internally disconnected 9, 16 NO1, NO2 (duplicate) Redundant NO pin assignments - electrically identical to pins 3 and 6; improves layout flexibility and current sharing 10, 15 IN1, IN2 Digital control inputs - accept 0.8V/2.4V logic thresholds; drive directly from microcontroller GPIO without buffering 11 V+ Positive supply input - must be decoupled with ≥1µF ceramic capacitor near pin; sets logic high threshold and P-FET gate drive 13 GND Ground reference - separate analog/digital ground not required; connects internal logic and level translators 14 V− Negative supply input - decouple identically to V+; determines N-FET gate drive and fault detection window Key Features
Feature Design Value Rail-to-rail signal handling Signals from V− to V+ pass unattenuated - eliminates level-shifting in ±10V industrial I/O modules Fault protection (±36V) Active with ±15V supplies - prevents latch-up or damage when 24V solenoid back-EMF couples into sensor lines No power-supply sequencing All switches default OFF at power-up - avoids undefined states in safety-critical PLC analog input cards Output clamping during fault COM pins clamp to V+ or V− - maintains defined logic levels at ADC inputs during fault, preventing system reset Pin compatibility with DG401 Direct PCB replacement for legacy designs - reduces redesign cost and qualification time for field-replacement units Applications
Industrial Data Acquisition ATE Equipment Avionics Sensor Interfaces Redundant Backup Systems Equivalent & Alternatives
Alternative Part Technical Difference Application Difference Selection Advice ADG408BRUZ 8-channel, single-supply only (+3V to +30V); no fault protection; 44Ω typical on-resistance Suitable for low-voltage, non-hazardous environments; lacks ±36V fault tolerance and rail-to-rail capability Select when board space allows larger TSSOP-16 and fault risk is mitigated externally TS5A3157DCKR Single SPDT, +1.65V to +5.5V supply; 0.75Ω on-resistance; no fault protection; 1.2ns turn-on Targeted at portable, battery-powered signal routing; incompatible with industrial ±15V or +24V rails Choose only for low-voltage, high-speed consumer electronics - not a functional substitute for MAX4631ESE+ Availability
Manufacturer
FAQ
What is the maximum fault voltage the MAX4631ESE+ can withstand on its NO pins?
Does the MAX4631ESE+ require power-supply sequencing during startup?
Can the MAX4631ESE+ operate from a single +12V supply?
Is the MAX4631ESE+ pin-compatible with the DG401?
What is the typical on-resistance match between the two switches in the MAX4631ESE+?
MAX4631ESE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- -
- Multiplexer/Demultiplexer Circuit:
- -
- Number of Circuits:
- -
- On-State Resistance (Max):
- -
- Channel-to-Channel Matching (ΔRon):
- -
- Voltage - Supply, Single (V+):
- -
- Voltage - Supply, Dual (V±):
- -
- Switch Time (Ton, Toff) (Max):
- -
- -3db Bandwidth:
- -
- Charge Injection:
- -
- Channel Capacitance (CS(off), CD(off)):
- -
- Current - Leakage (IS(off)) (Max):
- -
- Crosstalk:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MAX4631ESE+ FAQ
1.How can I place an order for MAX4631ESE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX4631ESE+ 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 MAX4631ESE+ reliable?
The price and inventory of MAX4631ESE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX4631ESE+ is usually 5 days.
3.What payment methods are accepted for MAX4631ESE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX4631ESE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX4631ESE+?
MAX4631ESE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX4631ESE+ 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 MAX4631ESE+?
For technical support, including MAX4631ESE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX4631ESE+ requirements.
6.How does Aetrix verify that MAX4631ESE+ is sourced from the original manufacturer or authorized distributors?
All MAX4631ESE+ 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 MAX4631ESE+ meets industry standards.
7.What is the process for return or replacement of MAX4631ESE+?
All MAX4631ESE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX4631ESE+, 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 MAX4631ESE+ part is unused and in its original packaging.
Return procedure for MAX4631ESE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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