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Analog Devices Inc./Maxim Integrated MAX355EWE+T
- Part No.:
- MAX355EWE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX355EWE+T.pdf
- Description:
- IC SWITCH SP4T X 2 350OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,188
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Product details
Overview
MAX355EWE+T from Maxim Integrated is a dual 4-channel fault-protected analog multiplexer designed for high-reliability signal routing in industrial and avionics systems. It operates from ±4.5V to ±18V dual supplies (or +4.5V to +36V single supply), features 350Ω max on-resistance, <0.5nA input leakage at +25°C, and guaranteed break-before-make switching. It protects against ±40V overvoltage with power off and clamps outputs to within 1.5V of supply rails during faults.
For engineers reviewing the MAX355EWE+T datasheet, MAX355EWE+T pinout, MAX355EWE+T application, or MAX355EWE+T equivalent, this page delivers verified specifications, validated pin functions, real-world fault-protection behavior, and direct alternatives for rugged analog signal routing in data-acquisition and redundant control systems.
Technical Context
The MAX355EWE+T implements a series N-channel/P-channel/N-channel FET structure that actively limits fault current to sub-microamp levels during ±40V overvoltage events-even with supplies off. Its digital inputs use fixed 0.8V/2.4V TTL-compatible thresholds referenced to GND, independent of supply voltage.
Each 4-channel section (COMA/NO1A–NO4A and COMB/NO1B–NO4B) supports bidirectional analog signal flow with 180ns typical transition time, 100ns break-before-make interval, and 80pC typical charge injection at ±15V supplies. Output clamping occurs at V+ −1.5V and V− +1.5V, preserving polarity and preventing glitches during fault entry/exit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | ±4.5V to ±18V dual or +4.5V to +36V single - enables operation in legacy industrial rails and modern wide-range systems without level-shifting. |
| On-Resistance (RON) | 350Ω max - ensures minimal gain error and settling-time impact when driving 10kΩ+ loads in precision DAQ front-ends. |
| Input Leakage | <0.5nA at +25°C - preserves accuracy in high-impedance sensor interfaces (e.g., thermocouples, pH electrodes). |
| Fault Protection | ±40V continuous overvoltage tolerance with supplies off - eliminates need for external TVS or series resistors in harsh environments. |
| Logic Thresholds | 0.8V low / 2.4V high - guarantees direct interface to 3.3V/5V TTL and CMOS controllers without pull-ups or translators. |
| Break-Before-Make | 100ns minimum - prevents momentary shorting between channels during address changes in multiplexed sensor arrays. |
| Charge Injection | 80pC typical at ±15V - limits voltage glitch to ≤80mV on 1nF output capacitance, critical for S/H and ADC input stability. |
Pinout & Package
MAX355EWE+T is housed in a 16-pin Wide SO (SOIC-W) package with 0.3-inch body width and standard 1.27mm pitch. Pin 1 is A1 (top-left corner, dot-marked); pin 16 is A0. All pins are electrically isolated from thermal pad (if present); no exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | Binary address inputs | Select one of four NOx channels per COM port; logic thresholds fixed at 0.8V/2.4V regardless of supply voltage. |
| EN | Active-high enable | Disables all switches when low; all channels remain off during power-up/down sequences - no power sequencing required. |
| COMA, COMB | Analog common outputs | Bidirectional ports - accept input signals during demux mode; each independently controlled by its own A0/A1 pair. |
| NO1A–NO4A, NO1B–NO4B | Analog channel inputs/outputs | Electrically identical and interchangeable; support ±13.5V output swing with ±15V supplies before clamping activates. |
| V+, V− | Power supply rails | V− must be connected to GND for single-supply operation; total V+–V− differential defines RON and signal range. |
| GND | Signal reference | Digital logic thresholds and fault-clamp voltages are referenced solely to this pin - critical for noise immunity in mixed-signal layouts. |
Key Features
| Feature | Design Value |
|---|---|
| Fault protection with supplies off | Blocks ±40V overvoltage using gate-biased series FETs - no external protection components needed in backup power or brown-out scenarios. |
| Output clamping at V±1.5V | Maintains correct polarity and prevents latch-up in downstream op-amps or ADC drivers during fault conditions. |
| Pin compatibility with ADG508F/ADG509F | Enables drop-in replacement in existing designs using those Analog Devices parts - same pinout, logic, and basic timing. |
| All switches off with supplies off | Eliminates signal leakage paths during power cycling - essential for fail-safe behavior in safety-critical avionics and process control. |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds work across full temperature range without pull-up resistors - reduces BOM count and layout complexity. |
Applications
| Industrial Process Monitoring | Avionics Sensor Multiplexing |
|---|---|
|
Use Scenario: Multiplexing 16 RTD or thermocouple inputs into a single 24-bit ΣΔ ADC in a PLC I/O module operating in 0°C to +85°C ambient. IC Role / Device Role / Timing Role: Dual 4-channel analog mux providing fault-isolated signal routing; break-before-make prevents cross-talk during channel scan. Use Value: ±40V fault tolerance eliminates external protection diodes, reducing board area and failure points in high-noise factory environments. |
Use Scenario: Routing redundant air-data sensor outputs (pitot/static pressure, angle-of-attack) to flight-control computers in commercial aircraft. IC Role / Device Role / Timing Role: Fault-protected signal switch ensuring continuity during lightning-induced transients or wiring faults. Use Value: Output clamping at V±1.5V prevents erroneous actuator commands caused by overvoltage-induced saturation in downstream op-amps. |
| ATE Channel Selection | Redundant Power-Supply Monitoring |
|
Use Scenario: Selecting DUT power-rail voltage sense points in automated test equipment with programmable ±15V supplies. IC Role / Device Role / Timing Role: High-voltage analog mux enabling safe probing of powered DUTs without risk of damaging measurement circuitry. Use Value: 350Ω RON and <0.5nA leakage preserve measurement accuracy across 100mV–10V ranges while surviving accidental 25V shorts. |
Use Scenario: Monitoring primary and backup 28VDC aircraft bus voltages with automatic switchover logic in a power-distribution unit. IC Role / Device Role / Timing Role: Bidirectional fault-protected switch allowing both sensing and control path isolation during bus faults. Use Value: All-switches-off behavior with supplies off guarantees no backfeed between primary and backup buses during cold start or failure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar fault-protected analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG509FBRUZ | Same pinout and function; 400Ω RON (vs. 350Ω), higher 2nA leakage at +85°C (vs. 5nA), ±20V fault rating (vs. ±40V). | Limited to lower-voltage industrial systems; not qualified for avionics-level transient immunity. | Choose ADG509FBRUZ only if cost is primary concern and ±20V fault margin suffices. |
| MAX355ESE+ | Identical electrical specs; packaged in 16-pin narrow SO (SOIC-N) instead of wide SO - 3.9mm vs. 7.5mm body width. | Requires PCB footprint change; unsuitable for space-constrained layouts designed for SOIC-W. | Choose MAX355ESE+ only when SOIC-N is mandated by assembly house or legacy board constraints. |
Compared with ADG509FBRUZ and MAX355ESE+, the MAX355EWE+T provides superior fault robustness (±40V), lower on-resistance, and wider SO packaging optimized for thermal dissipation and hand-soldering - making it the preferred choice for mission-critical analog routing where reliability outweighs footprint minimization.
Availability
MAX355EWE+T is available at Aetrix Electronics and suitable for industrial process control, avionics sensor interfaces, and ATE channel selection requiring stable component supply across extended temperature and high-reliability environments.
Supply support for MAX355EWE+T 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 MAX354/MAX355 product line was engineered specifically for fault-tolerant analog signal routing in safety-critical systems - prioritizing overvoltage resilience, leakage performance, and predictable clamping behavior over raw speed or integration density.
FAQ
What is the maximum overvoltage the MAX355EWE+T can withstand with power supplies disconnected?
The MAX355EWE+T withstands continuous ±40V overvoltage on any analog input or output terminal even when V+ and V− are disconnected or at 0V. This is achieved via internal series FETs biased by the overvoltage itself - no external components required. The device remains fully protected during power-up, power-down, and brown-out conditions, making it ideal for systems with unreliable or sequenced power rails.
Does the MAX355EWE+T support demultiplexing operation, and how does fault protection behave in that mode?
Yes, the MAX355EWE+T supports bidirectional operation and functions as a demultiplexer when the signal source is applied to COMA or COMB and routed to selected NOxA or NOxB terminals. Fault protection remains fully active: overvoltage on any NOx pin is clamped and blocked from reaching the common port, and all switches turn off automatically if the overvoltage exceeds rail limits - preserving integrity of the source signal path.
How does the on-resistance of the MAX355EWE+T vary with temperature and supply voltage?
The MAX355EWE+T exhibits 350Ω maximum on-resistance at +85°C and ±15V supplies, dropping to ~285Ω at +25°C. At ±5V supplies, RON increases by ~20% due to reduced FET drive strength. The datasheet guarantees monotonic RON vs. temperature behavior - rising linearly from +25°C to +85°C - enabling accurate gain-error compensation in calibrated systems using the MAX355EWE+T.
Can the MAX355EWE+T operate from an asymmetrical supply, such as +15V and −5V, and what is the resulting analog signal range?
Yes, the MAX355EWE+T supports asymmetrical supplies. With +15V and −5V, the analog output swing is limited to approximately +13.5V (V+ −1.5V) and −3.5V (V− +1.5V), giving a usable range of −3.5V to +13.5V. Digital thresholds remain centered at ~1.6V above GND, ensuring reliable logic operation. This flexibility allows integration into legacy systems with non-matched rails without redesigning power architecture.
Is the MAX355EWE+T pin-compatible with the MAX354EWE+T, and what design changes are needed for substitution?
No - the MAX355EWE+T (dual 4-channel) and MAX354EWE+T (single 8-channel) have different pinouts and logic decoding. MAX354 uses A0/A1/A2 for 8-channel selection; MAX355 uses A0/A1 per COM port with separate EN control. Substitution requires PCB layout revision, firmware address mapping update, and verification of channel count sufficiency. They share the same package footprint but are not drop-in replacements.
MAX355EWE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Circuit:
- SP4T
- Multiplexer/Demultiplexer Circuit:
- 4:1
- Number of Circuits:
- 2
- On-State Resistance (Max):
- 350Ohm
- Channel-to-Channel Matching (ΔRon):
- 7Ohm
- Voltage - Supply, Single (V+):
- 4.5V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 18V
- Switch Time (Ton, Toff) (Max):
- 250ns, 200ns
- -3db Bandwidth:
- -
- Charge Injection:
- 80pC
- Channel Capacitance (CS(off), CD(off)):
- 1.6pF, 5pF
- Current - Leakage (IS(off)) (Max):
- 500pA
- Crosstalk:
- -92dB @ 100kHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX355EWE+T FAQ
1.How can I place an order for MAX355EWE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX355EWE+T 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 MAX355EWE+T reliable?
The price and inventory of MAX355EWE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX355EWE+T is usually 5 days.
3.What payment methods are accepted for MAX355EWE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX355EWE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX355EWE+T?
MAX355EWE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX355EWE+T 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 MAX355EWE+T?
For technical support, including MAX355EWE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX355EWE+T requirements.
6.How does Aetrix verify that MAX355EWE+T is sourced from the original manufacturer or authorized distributors?
All MAX355EWE+T 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 MAX355EWE+T meets industry standards.
7.What is the process for return or replacement of MAX355EWE+T?
All MAX355EWE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX355EWE+T, 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 MAX355EWE+T part is unused and in its original packaging.
Return procedure for MAX355EWE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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