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Analog Devices Inc./Maxim Integrated MAX350CWN
- Part No.:
- MAX350CWN
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 18-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX350CWN.pdf
- Description:
- IC SWITCH SP4T X 2 100OHM 18SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,576
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Product details
Overview
MAX350CWN 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 rail-to-rail signal handling-used in industrial process control systems for programmable analog signal routing between sensors and ADCs.
For engineers reviewing the MAX350CWN datasheet, MAX350CWN pinout, MAX350CWN application, or MAX350CWN equivalent, key selection criteria include its daisy-chainable SPI/QSPI/MICROWIRE interface, 0.1nA off-leakage at +25°C, 8-bit shift-register control logic, and guaranteed break-before-make timing for channel switching integrity.
Technical Context
The MAX350CWN implements two independent 4-to-1 analog multiplexers (COMA/NO0A–NO3A and COMB/NO0B–NO3B), each controlled by four bits of an 8-bit serial shift register. Switch states update synchronously on the rising edge of CS, independent of SCLK phase-ensuring full SPI/QSPI compliance with CPOL = 0.
Its CMOS transmission-gate architecture supports rail-to-rail analog signals from V− to V+, with matched on-resistance (≤16Ω) and flat on-resistance (≤10Ω) over the full signal range. Power-up default resets all switches OFF and clears the shift register to zero.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-Resistance (RON) | 100Ω max at ±5V supplies - ensures minimal signal attenuation and gain error in precision measurement paths |
| On-Resistance Match | 16Ω max between channels - enables accurate ratiometric measurements across multiple sensor inputs |
| Off-Leakage Current | 0.1nA at +25°C - preserves high-impedance sensor node integrity and reduces offset drift in low-current applications |
| Supply Range | ±2.7V to ±8V dual or +2.7V to +16V single - supports flexible system-level power architecture without level-shifting |
| Serial Interface | SPI/QSPI/MICROWIRE-compatible 3-wire (DIN/SCLK/CS) with DOUT for daisy-chaining - eliminates parallel address decoding and simplifies multi-mux control |
| Turn-On/Off Time | 400ns/300ns typical (dual supply) - enables fast channel scanning in data-acquisition systems up to ~1MHz effective rate |
| ESD Protection | >2kV per Method 3015.7 - enhances robustness in industrial environments with frequent handling or connector mating |
Pinout & Package
MAX350CWN is housed in an 18-pin wide SO (Small Outline) package with 0.3" body width and standard JEDEC MS-013AC footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | DIN, V+, SCLK, GND | Serial data input, positive supply, clock input, digital ground reference for logic interface |
| 5, 10, 15, 16 | COMA, NO0A–NO3A | Common output and four normally-open inputs for first 4-to-1 mux section (A-side) |
| 11–14, 17, 18 | NO0B–NO3B, COMB, RESET, CS | Four B-side inputs, second common output, asynchronous reset, chip-select enable |
| 19, 20 | V−, DOUT | Negative supply (or GND for single supply); serial data output for daisy-chaining |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-Rail® Signal Handling | Analog signals swing fully from V− to V+ - eliminates clipping in ±5V or +12V industrial sensor interfaces |
| Asynchronous RESET Input | Pulls all switches OFF and clears shift register regardless of SCLK/CS state - enables safe recovery after fault or brownout |
| Dual 4-to-1 Mux Architecture | Two independent mux sections share one serial interface - reduces PCB real estate vs. discrete 4-channel solutions |
| TTL/CMOS-Compatible Logic Thresholds | 0.8V/2.4V thresholds at ±5V or +5V supplies - interoperates directly with microcontrollers and FPGAs without level shifters |
| Break-Before-Make Timing | 2ns minimum delay between switch turn-off and next turn-on - prevents momentary short-circuits during channel transitions |
Applications
| Industrial Process Monitoring | Automated Test Equipment (ATE) |
|---|---|
|
Use Scenario: Multiplexing thermocouple, RTD, and 4–20mA current-loop sensor outputs into a shared high-resolution ADC. IC Role / Device Role / Timing Role: Dual 4-to-1 analog mux providing configurable, low-leakage signal routing under microcontroller serial control. Use Value: Enables 8-sensor monitoring with single ADC channel while maintaining ≤0.1nA leakage-induced offset error at 25°C. |
Use Scenario: Routing stimulus signals and response measurements between DUT pins and test instrumentation in modular ATE racks. IC Role / Device Role / Timing Role: Bidirectional analog switch matrix with daisy-chainable interface for synchronized multi-site testing. Use Value: Reduces test head wiring complexity and supports simultaneous channel reconfiguration across 16+ devices via single SPI bus. |
| Avionics Sensor Interface | Audio Signal Routing |
|
Use Scenario: Selecting among redundant pressure, temperature, and inertial sensor feeds in flight control subsystems. IC Role / Device Role / Timing Role: Radiation-tolerant (M-grade variants available), low-power analog switch with deterministic RESET behavior. Use Value: Guarantees fail-safe OFF state on power-up or watchdog timeout-critical for DO-254 safety-critical signal paths. |
Use Scenario: Dynamic routing of line-level audio inputs (mic preamp, DAC, aux) to stereo output amplifiers in pro-audio mixers. IC Role / Device Role / Timing Role: Low-distortion, rail-to-rail analog mux with <−90dB crosstalk and THD <0.01% at 1kHz. Use Value: Preserves audio fidelity across switching events with no audible pop/click due to matched RON and break-before-make timing. |
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, 3V–5.5V single-supply only; 4Ω on-resistance; parallel 8-bit interface | Requires wider PCB layout and separate address decoding; better for high-channel-count, low-RON static routing | Choose ADG732BRUZ when channel count >8 and parallel control is preferred over serial daisy-chaining. |
| TMUX1308PWR | 8-channel SPST, 1.08V–5.5V supply; 5.5Ω on-resistance; I²C interface; no RESET pin | Lacks asynchronous reset and dual-supply capability; optimized for low-voltage battery-powered systems | Choose TMUX1308PWR for portable instrumentation where I²C integration and sub-2V operation outweigh need for ± supplies. |
Compared with ADG732BRUZ and TMUX1308PWR, MAX350CWN uniquely combines dual-supply flexibility, hardware RESET, and daisy-chain SPI-making it optimal for industrial and avionics systems requiring robust, field-upgradable analog routing with minimal control lines.
Availability
MAX350CWN is available at Aetrix Electronics and suitable for industrial process monitoring, automated test equipment (ATE), and avionics sensor interface applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX350CWN 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 belongs to Maxim's serially controlled analog switch/multiplexer product line, engineered for high-reliability signal routing in systems requiring low leakage, rail-to-rail performance, and SPI-compatible configurability.
FAQ
What is the maximum operating temperature range for the MAX350CWN?
The MAX350CWN 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 of the datasheet. The device uses the 'C' suffix to denote this grade, distinct from extended (E) or military (M) versions. For MAX350CWN, thermal derating begins above +70°C, and full parametric performance is guaranteed only within this interval.
Does the MAX350CWN support single-supply operation, and what is the minimum voltage?
Yes, the MAX350CWN supports single-supply operation from +2.7V to +16V, with verified functionality down to +2.7V. Electrical characteristics tables explicitly list performance data for +3V, +5V, and +12V single-supply conditions-including on-resistance, leakage, and timing. At +2.7V, RON rises to 500Ω (typical), but all logic and switching functions remain fully operational.
How does the daisy-chain capability of the MAX350CWN work in practice?
The MAX350CWN's DOUT pin outputs the DIN data delayed by eight clock cycles, enabling direct connection to DIN of the next device. With all CS pins tied together, a single 8×N-bit serial stream configures N devices simultaneously on the rising edge of CS. This eliminates address lines and allows scalable analog routing-e.g., 4× MAX350CWN units manage 32 sensor inputs using only three MCU pins (DIN/SCLK/CS).
Is the MAX350CWN pin-compatible with the MAX349 series?
No, MAX350CWN is not pin-compatible with MAX349 variants. The MAX349 is an 8-channel single-output mux (18-pin DIP/SO), while MAX350CWN implements two independent 4-channel muxes with different pin assignments-e.g., dedicated COMA/COMB and split NOx groups. Pin configurations are mutually exclusive per the "Pin Configurations/Functional Diagrams" section; board redesign is required for substitution.
What is the purpose of the RESET pin on the MAX350CWN, and how should it be used?
The RESET pin on the MAX350CWN asynchronously forces all analog switches OFF and clears the internal 8-bit shift register to zero, overriding ongoing serial communication. It must be driven low for ≥70ns (per timing specs) to guarantee reset. In normal operation, RESET is held high (V+ or logic HIGH). This feature enables deterministic fail-safe behavior during power sequencing, watchdog timeouts, or system initialization-critical in safety-aware applications.
MAX350CWN 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):
- 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 FAQ
1.How can I place an order for MAX350CWN through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX350CWN 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 reliable?
The price and inventory of MAX350CWN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX350CWN is usually 5 days.
3.What payment methods are accepted for MAX350CWN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX350CWN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX350CWN?
MAX350CWN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX350CWN 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?
For technical support, including MAX350CWN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX350CWN requirements.
6.How does Aetrix verify that MAX350CWN is sourced from the original manufacturer or authorized distributors?
All MAX350CWN 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 meets industry standards.
7.What is the process for return or replacement of MAX350CWN?
All MAX350CWN units undergo pre-shipment inspection (PSI). If there is an issue with MAX350CWN, 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 part is unused and in its original packaging.
Return procedure for MAX350CWN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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