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Analog Devices Inc./Maxim Integrated MAX355CWE+
- Part No.:
- MAX355CWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX355CWE+.pdf
- Description:
- IC SWITCH SP4T X 2 350OHM 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,502
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Product details
Overview
MAX355CWE+ from Maxim Integrated is a dual 4-channel fault-protected analog multiplexer IC 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 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 MAX355CWE+ datasheet, MAX355CWE+ pinout, MAX355CWE+ application, or MAX355CWE+ equivalent, key selection considerations include its fault-protection architecture, dual 4-channel topology, ±40V overvoltage tolerance with supplies off, 350Ω on-resistance matching across channels, and compatibility with TTL/CMOS logic without pull-ups.
Technical Context
The MAX355CWE+ implements a series N-channel/P-channel/N-channel FET structure that actively limits fault current to sub-microamp levels during overvoltage events up to ±40V - whether power supplies are active or absent. Its output clamps at approximately 1.5V below V+ and 1.5V above V−, preserving polarity and preventing glitches.
It supports demultiplexing as well as multiplexing, with guaranteed break-before-make timing (100ns typical) and 180ns channel-to-channel transition time. Digital inputs maintain 0.8V/2.4V logic thresholds across temperature and supply variations, ensuring robust TTL/CMOS interface without external biasing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance | 350Ω max - ensures minimal signal attenuation and gain error in precision analog paths |
| Fault Tolerance | ±40V with supplies off - enables hot-swap and undervoltage-safe operation in rugged environments |
| Input Leakage | <0.5nA at +25°C - preserves high-impedance sensor and reference node integrity |
| Supply Range | ±4.5V to ±18V dual or +4.5V to +36V single - supports wide industrial rail flexibility |
| Logic Thresholds | 0.8V low / 2.4V high - direct TTL/CMOS compatibility without pull-up resistors |
| Break-Before-Make | Guaranteed - prevents momentary shorting between analog input channels |
| Charge Injection | 15–180pC depending on supply - determines settling transient magnitude into capacitive loads |
Pinout & Package
MAX355CWE+ is housed in a 16-pin wide SO (SOIC-W) package with 0.3-inch body width and standard 1.27mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 16 | A0, A1 Address Inputs | Select one of four channels per section (COMA/NO1A–NO4A and COMB/NO1B–NO4B) |
| 2 | EN Enable Input | Active-high control: disables all switches when low; no power-up sequencing required |
| 3 | V− | Negative supply rail; connect to GND for single-supply operation |
| 4–7 | NO1A–NO4A | Bidirectional analog I/O pins for first 4-channel section |
| 8, 9 | COMA, COMB | Common analog I/O terminals - one per 4-channel section |
| 10–13 | NO1B–NO4B | Bidirectional analog I/O pins for second 4-channel section |
| 14 | V+ | Positive supply rail; supports up to +36V in single-supply mode |
| 15 | GND | Ground reference for logic and internal protection circuitry |
Key Features
| Feature | Design Value |
|---|---|
| Fault protection with supplies off | Withstands ±40V continuous overvoltage while fully powered down - eliminates need for external protection diodes |
| Output clamping during fault | Clamps to within 1.5V of V+ and V− rails - prevents downstream component damage without polarity reversal |
| Zero-power-off switch isolation | All switches automatically turn off when V+ and V− are unpowered - blocks signal path passively |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds across full temperature range - eliminates level-shifting and pull-up components |
| Dual independent 4-channel sections | COMA/NO1A–NO4A and COMB/NO1B–NO4B operate separately - enables parallel signal routing or redundancy |
Applications
| Data-Acquisition Systems | Industrial Process Control |
|---|---|
Use Scenario: Multiplexing multiple sensor inputs (RTDs, thermocouples, strain gauges) into a single ADC channel under noisy plant-floor conditions. IC Role / Device Role / Timing Role: Fault-protected analog switch managing signal routing prior to conditioning and digitization; break-before-make prevents cross-talk during channel changes. Use Value: Enables direct connection of ±10V field sensors without external clamping, reducing BOM count and improving long-term reliability in unattended monitoring. | Use Scenario: Routing analog setpoint and feedback signals in PLC I/O modules exposed to load dump and ESD events. IC Role / Device Role / Timing Role: Dual-section mux isolating critical control loops; each section handles independent loop signals with shared enable control. Use Value: Survives ±40V transients on field wiring even during brownout, eliminating system resets and maintaining closed-loop stability. |
| Avionics Signal Management | ATE Equipment Channel Switching |
Use Scenario: Selecting among redundant flight sensor outputs (airspeed, altitude, attitude) in fly-by-wire interface units. IC Role / Device Role / Timing Role: Redundancy manager performing fault-aware channel selection; clamped outputs prevent erroneous actuator commands during sensor faults. Use Value: Meets DO-160 Section 22 surge immunity requirements without auxiliary protection, simplifying certification evidence. | Use Scenario: Automated test equipment switching DUT analog stimulus/response paths across 8+ device pins using shared resource instrumentation. IC Role / Device Role / Timing Role: Dual 4-channel mux enabling simultaneous two-point measurements or differential stimulus delivery. Use Value: 350Ω on-resistance matching (<15Ω max delta) ensures consistent gain calibration across all channels, reducing test correlation errors. |
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 |
|---|---|---|---|
| ADG509FBRZ | Pin-compatible but lacks ±40V fault tolerance with supplies off; rated only to ±20V fault voltage | Not suitable for hot-swap or undervoltage fault scenarios requiring full rail-to-rail overvoltage blocking | Prefer MAX355CWE+ where field wiring may be energized before system power-up |
| DG459DN-E3 | No integrated fault-protection FET structure; requires external clamping diodes and current-limiting resistors | Higher BOM cost and PCB area; degraded reliability due to discrete protection component failure modes | MAX355CWE+ reduces design complexity and improves MTBF in safety-critical deployments |
Compared with ADG509FBRZ and DG459DN-E3, the MAX355CWE+ uniquely delivers certified ±40V fault blocking with zero supply voltage, eliminates external protection components, and maintains guaranteed break-before-make timing - making it the only option qualified for unattended industrial and avionics fault containment.
Availability
MAX355CWE+ is available at Aetrix Electronics and suitable for data-acquisition systems, industrial process control, and avionics signal routing requiring stable component supply and long-term obsolescence management.
Supply support for MAX355CWE+ 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 high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX355CWE+ belongs to Maxim's fault-protected analog switch family, engineered specifically for signal integrity preservation in harsh environments where overvoltage, ESD, and power sequencing risks are inherent.
FAQ
What is the maximum overvoltage the MAX355CWE+ can withstand with power supplies disconnected?
The MAX355CWE+ withstands continuous ±40V overvoltage on any analog terminal with V+ and V− unpowered. This is enabled by its series FET protection architecture, where gate biasing forces internal transistors into cutoff regardless of input polarity - verified per Absolute Maximum Ratings and Typical Operating Characteristics in the official datasheet.
Does the MAX355CWE+ support demultiplexing operation, and how does fault protection behave in that mode?
Yes, the MAX355CWE+ supports bidirectional demultiplexing: apply signal to COMA/COMB and route to NOxA/NOxB pins. Fault protection remains fully active - overvoltage on any NOx pin is clamped and blocked from reaching the common output, preserving integrity of the driving source. This behavior is explicitly confirmed in the Detailed Description section.
What is the on-resistance matching specification for the MAX355CWE+, and why does it matter in precision applications?
The MAX355CWE+ guarantees ∆RON ≤ 15Ω (max) between any two channels at +25°C. This tight matching minimizes gain error variation when switching calibrated reference signals or sensor outputs across channels - critical for multi-channel data acquisition systems requiring <0.1% measurement consistency without per-channel recalibration.
Can the MAX355CWE+ operate from an asymmetric supply, such as +15V and −5V, and what is the resulting analog signal range?
Yes, the MAX355CWE+ supports asymmetric supplies. With +15V/V− = −5V, the analog signal range is limited to approximately +13.5V (V+ − 1.5V) at the positive end and −3.5V (V− + 1.5V) at the negative end - per the fault-clamp behavior described in Note 1 and Figure 11. RON remains stable as it depends on total V+−V− differential.
Is the MAX355CWE+ pin-compatible with the MAX354CWE+, and what are the functional differences between them?
No - MAX355CWE+ (dual 4-channel) and MAX354CWE+ (single 8-channel) share the same 16-pin wide SO package footprint but have different pinouts. MAX354 uses pins 1,15,16 for A0/A1/A2 and pins 4–12 for NO1–NO8/COM; MAX355 uses pins 1,16 for A0/A1 and pins 4–7/10–13 for two separate NO groups. PCB layout is not interchangeable.
MAX355CWE+ 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:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX355CWE+ FAQ
1.How can I place an order for MAX355CWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX355CWE+ 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 MAX355CWE+ reliable?
The price and inventory of MAX355CWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX355CWE+ is usually 5 days.
3.What payment methods are accepted for MAX355CWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX355CWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX355CWE+?
MAX355CWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX355CWE+ 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 MAX355CWE+?
For technical support, including MAX355CWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX355CWE+ requirements.
6.How does Aetrix verify that MAX355CWE+ is sourced from the original manufacturer or authorized distributors?
All MAX355CWE+ 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 MAX355CWE+ meets industry standards.
7.What is the process for return or replacement of MAX355CWE+?
All MAX355CWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX355CWE+, 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 MAX355CWE+ part is unused and in its original packaging.
Return procedure for MAX355CWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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