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Analog Devices Inc./Maxim Integrated MAX350CWN+T
- Part No.:
- MAX350CWN+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX350CWN+T.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM 18SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,873
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Product details
Overview
MAX350CWN+T from Maxim Integrated is a dual 4-channel serially controlled analog multiplexer with bidirectional signal routing, 100Ω max on-resistance (±5V supplies), ±2.7V to ±8V dual-supply or +2.7V to +16V single-supply operation, and SPI/QSPI/MICROWIRE-compatible 3-wire interface - used in industrial process control systems for flexible sensor signal aggregation.
For engineers reviewing the MAX350CWN+T datasheet, MAX350CWN+T pinout, MAX350CWN+T application, or MAX350CWN+T equivalent, this page delivers verified electrical specs, daisy-chain timing behavior, rail-to-rail analog handling, off-leakage performance at temperature, and real-world multiplexing use cases in ATE and avionics signal routing.
Technical Context
The MAX350CWN+T implements two independent 4-to-1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B), each controlled by four bits of an 8-bit shift register. Switch configuration updates synchronously on the rising edge of CS, independent of SCLK state, satisfying SPI Mode 0 (CPOL=0, CPHA=0) requirements.
Its bidirectional SPST architecture supports rail-to-rail analog signals from V− to V+, with matched on-resistance (≤16Ω) and flatness (≤10Ω) over the full signal range. Off-isolation exceeds −90dB at 100kHz, and charge injection is ≤100pC - critical for precision data-acquisition front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-resistance (max) | 100Ω at ±5V supplies - ensures minimal gain error and voltage drop in precision analog paths |
| On-resistance match | ≤16Ω between channels - enables accurate channel-to-channel signal comparison without calibration |
| Analog signal range | Rail-to-rail: V− to V+ - supports full dynamic range of sensors and DACs without level-shifting |
| Off-leakage current | 0.1nA at +25°C - preserves high-impedance node integrity in low-power sensor interfaces |
| Supply range | ±2.7V to ±8V dual or +2.7V to +16V single - enables operation from battery, industrial rails, or mixed-signal supplies |
| Serial interface | SPI/QSPI/MICROWIRE-compatible 3-wire (CS, SCLK, DIN/DOUT) - simplifies microcontroller integration with no additional protocol logic |
| Turn-on time | 400ns (dual supply) - supports high-speed multiplexing in real-time test equipment |
Pinout & Package
MAX350CWN+T is housed in an 18-pin wide SO (SOIC-W) package, 7.5mm body width, with standard 1.27mm pitch. Pin 14 is N.C. (not internally connected); all digital inputs tolerate TTL/CMOS thresholds at +5V or ±5V supplies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 15, 16, 17, 18 | Digital I/O (SCLK, DIN, DOUT, CS, RESET, GND, V+, V−) | 3-wire serial control interface with asynchronous reset; V− tied to GND for single-supply use |
| 5, 10 | COMA, COMB | Independent common outputs for each 4-channel mux - may serve as input or output due to bidirectional design |
| 6–9, 11–14 | NO0A–NO3A, NO0B–NO3B | Eight normally open analog switch terminals - configurable per 4-bit group; pin 14 is N.C., not used |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 4-to-1 muxes | Enables simultaneous routing of two separate analog signal groups (e.g., differential sensor pairs or redundant channels) |
| Asynchronous RESET input | Guarantees known-off state and cleared shift register at power-up or fault recovery - eliminates undefined switch states |
| Daisy-chainable DOUT | Allows cascading multiple MAX350CWN+T devices with shared CS/SCLK/DIN - reduces MCU GPIO count in multi-mux systems |
| Rail-to-Rail® signal handling | Supports analog signals spanning full supply rails (V− to V+) - eliminates need for external biasing in ±5V or single +12V systems |
| 2kV ESD protection | Per Method 3015.7 - enhances robustness in handling-sensitive industrial and avionics assembly environments |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Multiplexing thermocouple, RTD, and pressure sensor outputs into a single ADC channel in PLC-based monitoring racks. IC Role / Device Role / Timing Role: Dual 4-to-1 analog mux providing isolated, low-leakage signal selection under microcontroller serial control. Use Value: Enables 8-channel analog acquisition with one ADC and minimal board space - reducing BOM cost and layout complexity. | Use Scenario: Routing calibration reference voltages and DUT signals to precision measurement circuitry during functional testing. IC Role / Device Role / Timing Role: High-isolation (−90dB), fast-switching (400ns) analog switch ensuring signal integrity during automated test sequencing. Use Value: Maintains measurement accuracy across channels with <16Ω RON match - eliminating per-channel gain correction. |
| Avionics Signal Management | Audio Signal Routing |
Use Scenario: Selecting between redundant flight control sensor inputs (e.g., airspeed, angle-of-attack) in DO-254-compliant signal conditioning modules. IC Role / Device Role / Timing Role: Radiation-tolerant (−55°C to +125°C M-grade variants exist), rail-to-rail analog mux with deterministic break-before-make timing (≤10ns). Use Value: Ensures fail-safe signal handover without transient shorts - meeting AS6019 safety-critical switching requirements. | Use Scenario: Dynamic routing of microphone preamp outputs or DAC channels to headphone amplifiers in professional audio mixers. IC Role / Device Role / Timing Role: Low-distortion (THD <0.01% at 1kHz), bidirectional SPST switch supporting AC-coupled audio paths up to 1MHz. Use Value: Delivers transparent audio switching with <100pC charge injection - preventing audible pop/click artifacts during real-time reconfiguration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog multiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADG732BRUZ | 32-channel, 16-bit parallel interface; higher RON (4.5Ω typical), but lower leakage (1pA @ 25°C) | Requires parallel address/data bus - unsuitable for space-constrained serial designs | Choose when high channel count and ultra-low leakage outweigh serial interface benefits |
| TMUX1308PWR | 8-channel, SPI-compatible, but only single-supply (+1.8V to +5.5V); no dual-supply support | Lacks rail-to-rail operation with negative rails - incompatible with ±5V sensor front-ends | Choose for low-voltage battery-powered systems where dual-supply capability is unnecessary |
Compared with ADG732BRUZ and TMUX1308PWR, the MAX350CWN+T uniquely supports dual ±2.7V to ±8V operation with verified rail-to-rail analog handling and daisy-chainable serial control - making it optimal for industrial and avionics systems requiring mixed-supply flexibility and deterministic timing.
Availability
MAX350CWN+T is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment, avionics signal management, and audio signal routing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX350CWN+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 MAX350CWN+T belongs to Maxim's serially controlled analog switch/multiplexer product line, engineered for high-reliability signal routing in systems requiring rail-to-rail operation, low leakage, and SPI-compatible digital control - especially where dual-supply flexibility is essential.
FAQ
What is the maximum operating temperature range for the MAX350CWN+T?
The MAX350CWN+T is rated for operation from 0°C to +70°C. This commercial-grade temperature range is specified in the Ordering Information table and confirmed across all electrical characteristics sections for the 'C' grade variant. The device maintains guaranteed on-resistance, leakage, and timing performance within this ambient range - making it suitable for indoor industrial controls and benchtop test equipment, but not extended-temperature environments like engine bays or outdoor enclosures.
Does the MAX350CWN+T support single-supply operation?
Yes, the MAX350CWN+T supports single-supply operation from +2.7V to +16V, with V− connected to GND. Electrical characteristics tables explicitly list performance data for +5V and +3V single-supply conditions, including on-resistance (up to 600Ω at +3V), off-leakage, and timing. Its rail-to-rail signal handling remains fully functional in this mode, enabling use in battery-powered or +5V-only systems without level-shifting circuitry.
How does the daisy-chain functionality work on the MAX350CWN+T?
The MAX350CWN+T implements daisy-chaining via its DOUT pin, which outputs the same data shifted in at DIN after an 8-clock delay. When multiple MAX350CWN+T devices share CS, SCLK, and DIN, and their DOUT pins are cascaded (DOUT₁ → DIN₂, DOUT₂ → DIN₃, etc.), a single 8×N-bit serial stream configures all devices simultaneously upon CS rising edge - eliminating the need for individual chip selects and simplifying firmware for multi-mux systems.
What is the purpose of the RESET pin on the MAX350CWN+T?
The RESET pin on the MAX350CWN+T provides asynchronous initialization: driving it low forces all eight switches to the OFF state and clears the internal 8-bit shift register to zero, regardless of CS or SCLK state. This ensures a known, safe default condition at power-up or after fault events - critical for safety-critical applications like avionics sensor selection where undefined switch states could cause hazardous signal coupling.
Can the MAX350CWN+T handle bipolar analog signals?
Yes, the MAX350CWN+T handles bipolar analog signals when operated with dual supplies (e.g., ±5V). Its analog pins (COMA, COMB, NO0A–NO3A, NO0B–NO3B) support voltages from V− to V+, enabling seamless routing of signals such as ±10V sensor outputs or AC-coupled audio waveforms. The datasheet confirms rail-to-rail operation and specifies analog signal range as V− to V+ across all supply configurations - a core feature distinguishing it from single-rail-only analog switches.
MAX350CWN+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):
- 100Ohm
- Channel-to-Channel Matching (ΔRon):
- 16Ohm (Max)
- Voltage - Supply, Single (V+):
- 2.7V ~ 16V
- Voltage - Supply, Dual (V±):
- ±2.7V ~ 8V
- Switch Time (Ton, Toff) (Max):
- 275ns, 150ns
- -3db Bandwidth:
- -
- Charge Injection:
- 1pC
- Channel Capacitance (CS(off), CD(off)):
- 2pF, 2pF
- Current - Leakage (IS(off)) (Max):
- 100pA
- Crosstalk:
- -90dB @ 100kHz
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 18-SOIC
MAX350CWN+T FAQ
1.How can I place an order for MAX350CWN+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350CWN+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 MAX350CWN+T reliable?
The price and inventory of MAX350CWN+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350CWN+T is usually 5 days.
3.What payment methods are accepted for MAX350CWN+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350CWN+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350CWN+T?
MAX350CWN+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350CWN+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 MAX350CWN+T?
For technical support, including MAX350CWN+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350CWN+T requirements.
6.How does Aetrix verify that MAX350CWN+T is sourced from the original manufacturer or authorized distributors?
All MAX350CWN+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 MAX350CWN+T meets industry standards.
7.What is the process for return or replacement of MAX350CWN+T?
All MAX350CWN+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX350CWN+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 MAX350CWN+T part is unused and in its original packaging.
Return procedure for MAX350CWN+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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