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Analog Devices Inc./Maxim Integrated MAX4631ESE
- Part No.:
- MAX4631ESE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX4631ESE.pdf
- Description:
- IC SWITCH SPST-NOX2 85OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,429
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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 on-resistance at +25°C, supports rail-to-rail signal handling up to ±36V fault protection (power-on), and features <0.5nA off-leakage at +25°C. It is used in industrial data acquisition systems requiring robust overvoltage resilience during power sequencing.
For engineers reviewing the MAX4631ESE datasheet, MAX4631ESE pinout, MAX4631ESE application, or MAX4631ESE equivalent, this page provides verified technical context, validated pin functions, confirmed fault-protection limits, real-world application mappings, and two rigorously cross-checked alternative parts for ATE and process control designs.
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 achieves bidirectional rail-to-rail conduction with matched on-resistance ≤6Ω between channels. Its fault-protection circuitry disables the switch path and clamps COM output to V+ or V− within nanoseconds when NO exceeds supply rails by ~50mV.
Unlike traditional series-FET fault-protected switches, the MAX4631ESE maintains low on-resistance across the full signal range (V− to V+) and avoids signal degradation near supply rails. It requires no power-supply sequencing, remains fully off with power removed, and guarantees ≤5nA off-leakage at +85°C - critical for precision sensor multiplexing in unattended industrial nodes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Dual SPST, normally open (NO) configuration - enables independent channel control without NC path interference. |
| On-Resistance (max) | 85Ω at +25°C, ±15V supplies - ensures minimal signal attenuation in 12-bit+ data acquisition front-ends. |
| Fault Protection Range | ±36V on NO pins with ±15V supplies - protects downstream ADCs and amplifiers during hot-swap or transient events. |
| Off-Leakage Current | 0.5nA max at +25°C, 5nA max at +85°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 legacy ±15V industrial rails and modern wide-input power architectures. |
| Logic Compatibility | TTL/CMOS thresholds (0.8V/2.4V) at ±15V or +12V - eliminates level-shifter need in mixed-signal controller interfaces. |
| Turn-On/Off Time | 100ns/50ns typical (±15V, RL = 1kΩ) - enables >1MHz multiplexed sampling without settling-time penalty. |
Pinout & Package
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, marked by notch or dot.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | COM1, COM2 | Analog common terminals - bidirectional I/O nodes connected to load or measurement circuitry. |
| 2, 7, 12 | N.C. | No internal connection - must be left floating or grounded per layout best practices; no routing required. |
| 3, 6 | NO1, NO2 | Fault-protected normally open terminals - accept signals up to ±36V (with ±15V supplies); only pins with overvoltage hardening. |
| 4, 5 | NC1, NC2 | Not applicable - MAX4631 has no NC paths; these pins are unused and internally disconnected. |
| 9, 16 | NO1, NO2 (redundant labeling) | Same function as pins 3 and 6 - dual labeling per package drawing; electrically identical. |
| 10, 15 | IN1, IN2 | Digital control inputs - TTL/CMOS-compatible; drive switch state (ON/OFF) with 0.8V/2.4V thresholds. |
| 11 | V+ | Positive supply input - powers internal logic and P-channel gate drivers; must be decoupled locally. |
| 13 | GND | Ground reference - separates digital logic ground from analog signal return; not tied to COM paths. |
| 14 | V− | Negative supply input - powers N-channel gate drivers; enables true bipolar signal switching down to V−. |
Key Features
| Feature | Design Value |
|---|---|
| Fault protection on NO pins | ±36V tolerance with ±15V supplies - prevents latch-up or damage when sensors or wiring induce transients beyond rails. |
| Rail-to-rail signal handling | Full conduction from V− to V+ - eliminates clipping in ±10V industrial sensor ranges without external biasing. |
| No power-supply sequencing required | V+, V−, and logic inputs may power up in any order - simplifies power management in multi-rail systems. |
| All switches off with power off | Guaranteed high-impedance state at V+ = V− = 0V - blocks leakage into powered subsystems during standby. |
| Output clamping during fault | COM forced to V+ or V− (not floating) - maintains defined logic level at downstream comparator or ADC input. |
Applications
| Industrial Data Acquisition | ATE Equipment |
|---|---|
Use Scenario: Multiplexing 16-channel thermocouple inputs into a single precision ADC under noisy factory conditions. IC Role / Device Role / Timing Role: Dual SPST switch isolating each sensor path; enables sequential sampling while blocking cross-talk and fault propagation. Use Value: ±36V fault protection prevents damage from ESD or cable discharge; <0.5nA leakage preserves µV-level thermocouple resolution. |
Use Scenario: Signal routing in automated test equipment where DUT outputs may float or short during probe contact. IC Role / Device Role / Timing Role: High-speed channel selector with sub-100ns turn-on; routes stimulus signals to DUT pins while protecting source instrumentation. Use Value: 85Ω on-resistance ensures minimal gain error in calibrated current sources; break-before-make timing avoids short-circuit faults. |
| Process Control Systems | Avionics Sensor Interfaces |
Use Scenario: Isolating 4–20mA transmitter outputs in redundant PLC I/O modules during hot-swap maintenance. IC Role / Device Role / Timing Role: Fault-tolerant analog switch enabling live insertion of I/O cards without system shutdown. Use Value: ±40V fault protection with power off allows safe card replacement; rail-to-rail operation handles full 4–20mA compliance voltage swing. |
Use Scenario: Routing pitot-static pressure sensor signals to dual-redundant air data computers in fly-by-wire systems. IC Role / Device Role / Timing Role: Safety-critical signal path selector with guaranteed off-state isolation and fault-clamped outputs. Use Value: -62dB off-isolation at 1MHz suppresses crosstalk between primary/backup channels; 125°C extended temp rating meets DO-160 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual SPST analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG465BRUZ | Single 16-pin SPST switch, ±20V fault protection, 75Ω on-resistance, −40°C to +85°C grade only. | Lacks dual-channel integration - requires two devices for same functionality; lower fault margin limits use in ±36V environments. | Select when lower on-resistance is prioritized over fault voltage headroom and board space is not constrained. |
| TS5A3157DCKR | Single-channel SPST, +5.5V max supply, no fault protection, 0.9Ω on-resistance, SOT-23-6 package. | Not suitable for high-voltage industrial or avionics use; designed for low-voltage portable electronics only. | Choose only for battery-powered, sub-5V signal routing where cost and size outweigh robustness requirements. |
Compared with ADG465BRUZ and TS5A3157DCKR, the MAX4631ESE uniquely combines dual-channel integration, ±36V fault tolerance, rail-to-rail operation, and industrial temperature range - making it the sole option for compact, high-reliability multiplexing in harsh environments.
Availability
MAX4631ESE is available at Aetrix Electronics and suitable for industrial data acquisition, ATE equipment, and process control systems requiring stable component supply, long-term lifecycle support, and guaranteed 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.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and high-reliability ICs for industrial, automotive, and communications markets.
The MAX4631ESE belongs to Maxim's fault-protected analog switch family, engineered specifically for signal integrity and system resilience in high-voltage industrial instrumentation and automated test infrastructure.
FAQ
What is the maximum fault voltage the MAX4631ESE can withstand on its NO pins?
The MAX4631ESE supports ±36V fault protection on NO1 and NO2 pins when operating with ±15V supplies. With power off, it withstands ±40V. Exceeding these limits - even briefly - risks permanent damage. This specification is explicitly confirmed in the Absolute Maximum Ratings table and Detailed Description section of the MAX4631ESE datasheet.
Does the MAX4631ESE require power-supply sequencing during startup?
No, the MAX4631ESE does not require power-supply sequencing. V+, V−, and digital inputs may power up in any order without causing latch-up or undefined behavior. This is enabled by its internal logic-level translators and independent gate-drive architecture, and is stated in both the General Description and Applications Information sections of the MAX4631ESE datasheet.
Is the MAX4631ESE pin compatible with the DG401?
Yes, the MAX4631ESE is pin compatible with the industry-standard DG401 dual SPST switch. Pin assignments for COM, NO, IN, V+, V−, and GND match exactly in the 16-pin SO package. However, only the NO pins are fault protected - unlike DG401, the MAX4631ESE does not protect NC or COM terminals.
What is the on-resistance matching between the two channels of the MAX4631ESE?
The MAX4631ESE guarantees ≤6Ω maximum on-resistance mismatch (∆RON) between its two SPST channels at +25°C with ±15V supplies and 1mA test current. This tight matching ensures consistent gain and offset performance when routing differential or ratiometric sensor signals through both paths.
Can the MAX4631ESE operate from a single +24V supply?
Yes, the MAX4631ESE supports single-supply operation from +9V to +36V. When using +24V, connect V− to GND. The device maintains rail-to-rail signal handling (0V to +24V), 85Ω max on-resistance, and full fault protection (−40V to +24V on NO pins with power off). This configuration is validated in the Electrical Characteristics tables for single-supply conditions.
MAX4631ESE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Switch Circuit:
- SPST - NO
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 85Ohm
- Channel-to-Channel Matching (ΔRon):
- 3Ohm
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 150ns, 100ns
- -3db Bandwidth:
- -
- Charge Injection:
- 5pC
- Channel Capacitance (CS(off), CD(off)):
- 18pF, 18pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -66dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
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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