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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:4,559
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Product details
Overview
MAX355CWE 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 guarantees break-before-make switching. It protects against ±40V overvoltage with supplies 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 criteria include fault-protection robustness under power-loss conditions, dual 4-channel channel count for redundant signal paths, ±40V absolute input tolerance, TTL/CMOS logic compatibility without pull-ups, and wide temperature range (0°C to +70°C) in 16-pin wide SO package.
Technical Context
The MAX355CWE implements a series N-channel/P-channel/N-channel FET structure that actively limits fault current to sub-microamp levels and prevents polarity reversal during ±40V overvoltage events-whether power supplies are on or off. Its digital interface uses fixed 0.8V/2.4V logic thresholds referenced to GND, ensuring interoperability with TTL and CMOS across full temperature range without external biasing.
Each of its two independent 4:1 mux sections supports bidirectional analog signal flow, demultiplexing capability, and output clamping at (V+ − 1.5V) and (V− + 1.5V). On-resistance matching between channels is ≤15Ω, and transition time is 180ns typical, with guaranteed 100ns break-before-make interval to prevent channel-to-channel shorting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Configuration | Dual 4-channel analog multiplexer (two independent 4:1 switches) |
| Supply Range | ±4.5V to ±18V dual or +4.5V to +36V single - enables operation in harsh industrial rail environments |
| On-Resistance | 350Ω max - ensures minimal signal attenuation and gain error in precision measurement paths |
| Input Leakage | 0.5nA max at +25°C - preserves high-impedance sensor node integrity and reduces offset drift |
| Fault Tolerance | ±40V continuous input with supplies off - eliminates need for external protection diodes or TVS |
| Logic Thresholds | 0.8V low / 2.4V high - direct interface with standard TTL/CMOS without pull-up resistors or level shifters |
| Break-Before-Make | Guaranteed ≥100ns - prevents momentary shorting between analog inputs during channel switching |
Pinout & Package
MAX355CWE is housed in a 16-pin wide SO (SOIC-W) surface-mount package, 7.5mm body width, 1.27mm pitch, RoHS-compliant. Pin 1 is A1 (MSB address), pin 2 is GND, pin 3 is V+, pin 4–7 are NO1A–NO4A (analog inputs for Section A), pin 8 is COMA (common output for Section A), pin 9 is COMB (common output for Section B), pin 10–13 are NO1B–NO4B (analog inputs for Section B), pin 14 is V−, pin 15 is EN (enable), and pin 16 is A0 (LSB address).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0, A1 | Binary address inputs | Select one of four analog channels per section; no internal pull-ups required |
| EN | Active-high enable | Disables both sections simultaneously; all switches open when low |
| COMA, COMB | Common analog I/O terminals | Bidirectional - function as inputs (demux) or outputs (mux); internally protected |
| NO1A–NO4A, NO1B–NO4B | Analog channel inputs/outputs | Fully interchangeable with COM pins; each supports ±40V fault voltage with supplies off |
| V+, V− | Power supply rails | V− may be tied to GND for single-supply operation; total V+–V− differential must be ≥4.5V |
| GND | Signal reference ground | Digital logic thresholds referenced solely to this pin; forms isolation barrier with V− |
Key Features
| Feature | Design Value |
|---|---|
| Fault protection with supplies off | Withstands ±40V continuous input regardless of V+/V− state - eliminates system-level power sequencing constraints |
| Output clamping during fault | Clamps COM outputs to (V+ − 1.5V) and (V− + 1.5V) - prevents downstream component damage without external clamp diodes |
| No power-up sequencing required | Operates correctly even if analog signals are present before power rails stabilize - simplifies system startup design |
| TTL/CMOS logic compatibility | 0.8V/2.4V thresholds referenced to GND - interfaces directly with microcontrollers and FPGAs without level-shifting circuitry |
| Break-before-make guarantee | ≥100ns minimum interval between channel disconnect and next connect - prevents cross-talk or short-circuits in multi-sensor routing |
Applications
| Industrial Process Monitoring | Avionics Sensor Signal Routing |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and strain gauge signals from multiple zones into a single ADC in a PLC cabinet exposed to EMI and transient surges. IC Role / Device Role / Timing Role: Dual 4:1 analog mux providing isolated, fault-protected signal path selection with simultaneous channel independence. Use Value: ±40V fault tolerance eliminates need for discrete protection components; 0.5nA leakage maintains accuracy in high-impedance sensor bridges. |
Use Scenario: Routing redundant air data computer (ADC) outputs and inertial reference unit (IRU) signals to flight control computers in fly-by-wire systems. IC Role / Device Role / Timing Role: Fault-protected signal switch enabling automatic failover between primary and backup sensor chains without interruption. Use Value: Guaranteed break-before-make prevents shorting between dissimilar voltage domains; output clamping ensures safe voltage levels during lightning-induced transients. |
| ATE Channel Selection | Redundant Power System Monitoring |
Use Scenario: Selecting DUT test points across multiple PCBs in automated test equipment where probe contact bounce and floating grounds cause unpredictable overvoltages. IC Role / Device Role / Timing Role: Dual-section mux enabling parallel test path configuration while maintaining galvanic isolation between test fixtures. Use Value: All-switches-off behavior with supplies off prevents back-driving; 350Ω RON ensures minimal loading on precision calibration sources. |
Use Scenario: Monitoring battery bank voltages, bus tie status, and generator outputs in marine or telecom backup power systems subject to load dump and reverse polarity events. IC Role / Device Role / Timing Role: Bidirectional analog switch routing DC voltage and current sense signals to monitoring ICs under fault conditions. Use Value: ±40V tolerance accommodates 24V/48V system transients; V− tied to GND enables single-supply operation with no performance penalty. |
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; max fault rating is ±20V only with power applied | Suitable for lower-risk industrial environments where power sequencing is controlled and external protection is acceptable | Choose ADG509FBRZ only if system guarantees stable V+/V− before analog signal application and accepts higher BOM cost for external TVS diodes |
| MAX355EWE | Identical functionality and pinout; extended temperature range (−40°C to +85°C) vs. MAX355CWE's 0°C to +70°C | Required for automotive under-hood or outdoor base station deployments requiring wider thermal margin | Select MAX355EWE when operating ambient exceeds +70°C or requires industrial-grade reliability qualification |
Compared with ADG509FBRZ, MAX355CWE delivers superior fault resilience without external components; compared with MAX355EWE, it offers cost-optimized performance for commercial-temperature applications where extended range is unnecessary.
Availability
MAX355CWE is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and ATE equipment requiring stable component supply with guaranteed long-term manufacturability and consistent parametric performance.
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 precision analog, mixed-signal, and power management ICs for demanding industrial, medical, and aerospace applications.
The MAX355CWE belongs to Maxim's fault-protected analog switch family, engineered specifically for systems where analog signal integrity must be preserved despite uncontrolled power sequencing, field wiring errors, or lightning-induced transients.
FAQ
What is the maximum continuous overvoltage the MAX355CWE can withstand with power supplies disconnected?
The MAX355CWE withstands ±40V continuous analog input voltage even when V+ and V− are at 0V - a core feature of its series FET protection architecture. This eliminates reliance on external clamping diodes or TVS devices in systems prone to wiring faults or hot-plug events. The MAX355CWE maintains sub-nanoamp leakage and infinite on-resistance under these conditions, preserving downstream circuit safety without any power sequencing requirements.
Can the MAX355CWE operate from a single +12V supply, and how does that affect its analog signal range?
Yes, the MAX355CWE supports single-supply operation from +4.5V to +36V by connecting V− to GND. With +12V on V+ and V− = GND, the analog signal range is limited to approximately 0V to +10.5V (V+ − 1.5V), as output clamping occurs 1.5V below V+. The MAX355CWE retains full 350Ω on-resistance spec and TTL/CMOS logic compatibility - no level-shifting or external biasing is needed for digital control lines.
Is the MAX355CWE pin-compatible with the ADG509F, and what are the critical functional differences?
The MAX355CWE is pin-compatible with ADG509FBRZ in the 16-pin SO package, sharing identical pin assignments for A0/A1, EN, COMA/COMB, NOxA/NOxB, V+, V−, and GND. However, the MAX355CWE provides ±40V fault tolerance with supplies off, whereas ADG509F is rated only for ±20V with power applied. That makes MAX355CWE suitable for uncontrolled environments where power loss and signal presence coexist - a key distinction confirmed in both manufacturers' datasheets.
Does the MAX355CWE support demultiplexing, and how is fault protection maintained in that mode?
Yes, the MAX355CWE fully supports demultiplexing: apply the analog signal to COMA or COMB, and route it to selected NOxA or NOxB outputs. Fault protection remains active - if an overvoltage appears on any NOx pin while the channel is off, the series FET structure isolates it from COM and limits current to nanoamps. When the channel is on and overvoltage occurs, the output clamps to safe levels. This bidirectional protection is explicitly verified in Maxim's detailed description and test circuits.
What is the guaranteed break-before-make interval for the MAX355CWE, and why is it critical in multi-sensor systems?
The MAX355CWE guarantees a minimum 100ns break-before-make interval between channel disconnect and reconnect. This prevents momentary short-circuits when switching between sensors with different common-mode voltages - for example, routing thermocouples at varying ground potentials or bridging isolated power domains. In multi-sensor data acquisition, this eliminates crosstalk-induced measurement corruption and protects sensitive front-end amplifiers from latch-up or damage due to inter-channel transients.
MAX355CWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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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