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Analog Devices Inc./Maxim Integrated MAX355EWE+
- Part No.:
- MAX355EWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX355EWE+.pdf
- Description:
- IC SWITCH SP4T X 2 350OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:212
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Product details
Overview
MAX355EWE+ 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), delivers 350Ω max on-resistance, <0.5nA input leakage at +25°C, and guarantees 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+ datasheet, MAX355EWE+ pinout, MAX355EWE+ application, or MAX355EWE+ equivalent, key selection criteria include fault protection level (±40V with supplies off), dual 4-channel topology, wide supply range compatibility, guaranteed break-before-make timing (≥100ns), and TTL/CMOS logic compatibility without pull-ups.
Technical Context
The MAX355EWE+ implements a series N-channel/P-channel/N-channel FET structure that actively limits fault current to sub-microamp levels during overvoltage events, whether power is applied or absent. Its analog signal path remains isolated until enabled, and output clamping occurs at ~1.5V below V+ and ~1.5V above V− during overvoltage conditions.
Digital control uses fixed 0.8V/2.4V logic thresholds referenced to GND-ensuring robust TTL and CMOS compatibility across temperature and supply variations. Switching is controlled by two address lines (A0, A1) and an enable (EN), supporting independent selection of COMA/COMB outputs with no power-up sequencing required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Dual 4-channel analog multiplexer: two independent COM/NO banks (COMA/NO1A–NO4A and COMB/NO1B–NO4B) |
| Supply Range | ±4.5V to ±18V dual supply or +4.5V to +36V single supply - supports industrial rail flexibility and asymmetrical operation |
| On-Resistance | 350Ω max - enables low-gain error in precision signal chains with ≤10kΩ source impedance |
| Input Leakage | <0.5nA at +25°C - preserves high-impedance sensor node integrity in data-acquisition front-ends |
| 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 - ensures direct interface with standard TTL/CMOS without pull-up resistors or level shifters |
| Break-Before-Make | Guaranteed ≥100ns interval - prevents momentary shorting between analog inputs during channel switching |
Pinout & Package
MAX355EWE+ 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, index mark adjacent), and pin 16 is A0 (bottom-right corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | Binary address inputs | Select one of four NOx channels per COM bank; decoded internally with no external logic required |
| EN | Active-high enable | Disables all switches when low; ensures zero-power analog isolation and prevents unintended conduction |
| COMA, COMB | Analog common outputs | Independent bidirectional signal paths - support both multiplexing (NO→COM) and demultiplexing (COM→NO) |
| NO1A–NO4A, NO1B–NO4B | Analog channel inputs/outputs | Bidirectional, electrically identical terminals - allow flexible signal routing without polarity constraints |
| V+, V− | Power supply rails | V− may be tied to GND for single-supply operation; total voltage difference determines RON and signal swing |
| GND | Signal reference ground | Logic threshold reference and internal isolation plane - separates digital and analog sections by >100dB |
Key Features
| Feature | Design Value |
|---|---|
| Fault protection with supplies off | Withstands ±40V continuous overvoltage even when V+/V− = 0V - eliminates startup fault vulnerability in power-cycled systems |
| Output clamping during fault | Clamps COM outputs to within 1.5V of V+ and V− rails - prevents downstream component damage without external zeners |
| No power-up sequencing | Operates correctly regardless of V+, V−, or logic signal ramp order - simplifies system-level power management |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds referenced to GND - interfaces directly with microcontrollers, FPGAs, and logic families without bias networks |
| Demultiplexer capability | Full fault protection retained when used as demux (signal applied to COM, routed to NOs) - extends utility beyond basic muxing |
Applications
| Industrial Process Control | Avionics Signal Management |
|---|---|
Use Scenario: Routing multiple sensor signals (RTD, thermocouple, pressure transducer) into a shared ADC in PLC or DCS cabinets exposed to ESD and load dump transients. IC Role / Device Role / Timing Role: Fault-protected analog switch providing channel selection and overvoltage isolation before signal conditioning and digitization. Use Value: Eliminates need for discrete protection components per channel, reduces BOM count by ≥40%, and maintains signal integrity under ±30V field wiring faults. | Use Scenario: Selecting redundant flight control sensor inputs (accelerometers, gyros) in fly-by-wire systems where single-point failure must not propagate. IC Role / Device Role / Timing Role: Dual-bank multiplexer enabling independent monitoring of primary and backup sensor sets with guaranteed break-before-make switching. Use Value: Prevents cross-talk between redundant channels during switching; ±40V fault tolerance meets DO-160 Section 22 induced transient requirements. |
| ATE Equipment | Data Acquisition Front-End |
Use Scenario: Channel switching in automated test systems connecting DUT analog I/O to precision sources and meters under varying supply configurations. IC Role / Device Role / Timing Role: High-voltage-tolerant analog switch enabling reconfigurable test fixture wiring without manual patching or relay wear-out. Use Value: Supports ±18V operation and 350Ω RON stability across temperature - ensures measurement repeatability over 10,000+ thermal cycles. | Use Scenario: Multiplexing low-leakage sensor outputs (photodiode, pH electrode) into a low-noise instrumentation amplifier stage in portable environmental monitors. IC Role / Device Role / Timing Role: Ultra-low-leakage (<0.5nA) analog switch preserving signal fidelity in high-impedance, low-current measurement paths. Use Value: Input leakage specification validated at +25°C and +85°C - enables accurate DC-coupled measurements without calibration drift compensation. |
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 |
|---|---|---|---|
| ADG509FTRZ | Pin-compatible but lacks ±40V fault protection with supplies off; max fault tolerance is ±20V only with power applied | Not suitable for systems requiring hot-swap or unpowered field wiring resilience | Choose ADG509FTRZ only if fault exposure is limited to powered operation and lower voltage margins are acceptable |
| MAX355CWE+ | Same architecture and pinout, but rated for 0°C to +70°C commercial temperature range instead of -40°C to +85°C | Excludes use in extended-temperature industrial or avionics deployments | Select MAX355CWE+ only for cost-sensitive, non-extended-temperature applications where full industrial grade is unnecessary |
Compared with MAX355EWE+, ADG509FTRZ offers identical pinout but significantly reduced fault resilience, while MAX355CWE+ provides identical functionality at lower temperature grade-making MAX355EWE+ the sole choice for extended-temperature, high-fault-risk deployments.
Availability
MAX355EWE+ is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and ATE equipment requiring stable component supply across extended temperature and high-reliability fault conditions.
Supply support for MAX355EWE+ 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 where overvoltage events occur with or without power applied.
FAQ
What is the maximum overvoltage tolerance of the MAX355EWE+ when power supplies are disconnected?
The MAX355EWE+ withstands continuous ±40V overvoltage on any analog terminal-even when V+ and V− are at 0V. This is achieved via its series N/P/N FET structure, which blocks conduction using gate-source voltage biasing independent of supply presence. No external protection is needed for this condition, and leakage remains below 5nA at +85°C per the datasheet's 100% tested specification.
Does the MAX355EWE+ support demultiplexer operation with full fault protection?
Yes, the MAX355EWE+ supports demultiplexer mode with complete fault protection. When an analog signal is applied to COMA or COMB and routed to selected NOx terminals, the same series FET structure limits fault current and clamps outputs during overvoltage. This behavior is explicitly confirmed in the "Operation as a Demultiplexer" section of the MAX354/MAX355 datasheet and distinguishes it from earlier fault-protected mux generations.
What is the guaranteed break-before-make interval for the MAX355EWE+?
The MAX355EWE+ guarantees a minimum break-before-make interval of 100ns, measured from the 50% point of the disabling switch's turn-off to the 50% point of the enabling switch's turn-on. This parameter is production-tested and specified in the Electrical Characteristics table under "tOPEN". It prevents momentary shorts between analog inputs during channel transitions, critical for avoiding signal corruption in multi-channel DAQ systems.
Can the MAX355EWE+ operate from an asymmetrical supply, such as +15V and -5V?
Yes, the MAX355EWE+ supports asymmetrical supplies. Its operation depends on the total voltage difference between V+ and V−, not symmetry. With +15V and -5V, the 20V differential yields RON and signal swing consistent with ±10V operation per the Typical Operating Characteristics graphs. Digital thresholds remain referenced to GND, ensuring reliable logic interface regardless of rail imbalance.
Is the MAX355EWE+ pin-compatible with the ADG509F series?
Yes, the MAX355EWE+ is pin-compatible with ADG509F/ADG509FTRZ in the 16-pin SOIC package. Both share identical pin assignments for A0, A1, EN, COMA, COMB, NO1A–NO4A, NO1B–NO4B, V+, V−, and GND. However, functional equivalence is limited: ADG509F lacks the ±40V fault protection with supplies off and has higher on-resistance (400Ω vs. 350Ω), so direct substitution requires validation of fault resilience requirements.
MAX355EWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- 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+ FAQ
1.How can I place an order for MAX355EWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX355EWE+ 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+ reliable?
The price and inventory of MAX355EWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX355EWE+ is usually 5 days.
3.What payment methods are accepted for MAX355EWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX355EWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX355EWE+?
MAX355EWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX355EWE+ 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+?
For technical support, including MAX355EWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX355EWE+ requirements.
6.How does Aetrix verify that MAX355EWE+ is sourced from the original manufacturer or authorized distributors?
All MAX355EWE+ 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+ meets industry standards.
7.What is the process for return or replacement of MAX355EWE+?
All MAX355EWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX355EWE+, 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+ part is unused and in its original packaging.
Return procedure for MAX355EWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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